Brightest Cluster Galaxies and Core Gas Density in REXCESS Clusters (2009)
Haarsma, D. B., Leisman, L., Donahue, M., Bruch, S., Boehringer, H., Croston, J. H., ...
We investigate the relationship between brightest cluster galaxies (BCGs) and their host clusters using a sample of nearby galaxy clusters from the Representative XMM-Newton Cluster Structure Survey...
Arnaud, M., Pratt, G. W., Piffaretti, R., Boehringer, H., Croston, J. H., Pointecouteau, E.
(abridged) We investigate the regularity of cluster pressure profiles with REXCESS, a representative sample of 33 local clusters observed with XMM-Newton. The sample spans a mass range of 10^14 M_sun
Pratt, G. W., Arnaud, M., Piffaretti, R., Boehringer, H., Ponman, T. J., Croston, J. H., ...
(Abridged) We examine the radial entropy distribution and its scaling using 31 nearby galaxy clusters from the Representative XMM-Newton Cluster Structure Survey (REXCESS). The entropy profiles are...
Stellar and Total Baryon Mass Fractions in Groups and Clusters Since Redshift 1 (2009)
Giodini, S., Pierini, D., Finoguenov, A., Pratt, G. W., Boehringer, H., Leauthaud, A., ...
We investigate if the discrepancy between estimates of the total baryon mass fraction obtained from observations of the cosmic microwave background (CMB) and of galaxy groups/clusters persists when a...
The dynamical intracluster medium: a combined approach of observations and simulations (2009)
Roediger, E., Brueggen, M., Simionescu, A., Boehringer, H., Heinz, S.
Current high resolution observations of galaxy clusters reveal a dynamical intracluster medium (ICM). The wealth of structures includes signatures of interactions between active galactic nuclei (AGN)...
The REFLEX galaxy cluster survey. VIII. Spectroscopic observations and optical atlas (2009)
Guzzo, L., Schuecker, P., Boehringer, H., Collins, C. A., Ortiz-Gil, A., De Grandi, S., ...
We present the final data from the spectroscopic survey of the ROSAT-ESO Flux-Limited X-ray (REFLEX) catalog of galaxy clusters. The REFLEX survey covers 4.24 steradians (34% of the entire sky) below...
Stellar and total baryon mass fractions in groups and clusters since redshift 1 (2009)
Giodini, S., Pierini, D., Finoguenov, A., Pratt, G. W., Boehringer, H., Leauthaud, A., ...
We investigate if the discrepancy between estimates of the total baryon mass fraction obtained from observations of the cosmic microwave background (CMB) and of galaxy groups/clusters persists when a...
Weak lensing observations of potentially X-ray underluminous galaxy clusters (2009)
Dietrich, J. P., Biviano, A., Popesso, P., Lombardi, M., Boehringer, H.
Optically selected clusters of galaxies display a relation between their optical mass estimates and their X-ray luminosities Lx that has a large scatter. A substantial fraction of optically selected...
Cosmological Studies With A Large-Area X-ray Telescope (2009)
Vikhlinin, A., Allen, S. W., Arnaud, M., Bautz, M., Boehringer, H., Bonamente, M., ...
A moderate investment of observing time with the International X-ray Observatory to study high-redshift galaxy clusters detected in future large-scale surveys, will provide cosmological measurements...
Braglia, F. G., Pierini, D., Biviano, A., Boehringer, H.
The current paradigm of cosmic formation and evolution of galaxy clusters foresees growth mostly through merging. Galaxies in the infall region or in the core of a cluster undergo transformations...
The XMM-Newton wide-field survey in the COSMOS field. The point-like X-ray source catalogue (2009)
Cappelluti, N., Brusa, M., Hasinger, G., Comastri, A., Zamorani, G., Finoguenov, A., ...
The COSMOS survey is a multiwavelength survey aimed to study the evolution of galaxies, AGN and the large scale structure. The XMM-COSMOS is a deep X-ray survey over the full 2 deg2 of the COSMOS...
Pratt, G.W., Croston, J.H., Arnaud, M., Boehringer, H.
Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory (ESO) DOI: 10.1051/0004-6361/200810994
Stellar and Total Baryon Mass Fractions in Groups and Clusters since Redshift 1 (2009)
Giodini, S., Pierini, D., Finoguenov, A., Pratt, G. W., Boehringer, H., Leauthaud, A., ...
Pratt, G. W., Croston, J. H., Arnaud, M., Boehringer, H.
(Abridged) We examine the X-ray luminosity scaling relations of 31 nearby galaxy clusters from the Representative XMM-Newton Cluster Structure Survey (REXCESS). The objects are selected in X-ray...
Galaxy Clusters in the Swift/BAT era: Hard X-rays in the ICM (2008)
Ajello, M., Rebusco, P., Cappelluti, N., Reimer, O., Boehringer, H., Greiner, J., ...
We report about the detection of 10 clusters of galaxies in the ongoing Swift/BAT all-sky survey. This sample, which comprises mostly merging clusters, was serendipitously detected in the 15--55 keV...
XMM-Newton studies of a massive cluster of galaxies: RXCJ2228.6+2036 (2008)
Jia, S. M., Boehringer, H., Pointecouteau, E., Chen, Y., Zhang, Y. Y.
We present the X-ray properties of a massive cluster of galaxies (RXCJ2228.6+2036 at $z=0.421$) using {\it XMM-Newton} data. The X-ray mass modeling is based on the temperature and density...
Pierini, D., Zibetti, S., Braglia, F., Boehringer, H., Finoguenov, A., Lynam, P. D., ...
[Abridged] We searched for diffuse stellar emission around BCGs in three of the most X-ray luminous clusters found at z~0.3 in the REFLEX cluster survey and observed with XMM-Newton. These systems...
Werner, N., Finoguenov, A., Kaastra, J. S., Simionescu, A., Dietrich, J. P., Vink, J., ...
About half of the baryons in the local Universe are invisible and - according to simulations - their dominant fraction resides in filaments connecting clusters of galaxies in the form of low density...
Fassbender, R., Boehringer, H., Lamer, G., Mullis, C. R., Rosati, P., Schwope, A., ...
X-ray luminous clusters of galaxies at z~1 are emerging as major cosmological probes and are fundamental tools to study the cosmic large-scale structure and environmental effects of galaxy evolution...
Finoguenov, A., Boehringer, H., Smith, G. P., Kneissl, R., ...
The Local Cluster Substructure Survey (LoCuSS, Smith et al.) is a systematic multi-wavelength survey of >100 X-ray luminous galaxy clusters (0.14
Croston, J. H., Pratt, G. W., Boehringer, H., Arnaud, M., Pointecouteau, E., Ponman, T. J., ...
We present a study of the structural and scaling properties of the gas distributions in the intracluster medium (ICM) of 31 nearby (z < 0.2) clusters observed with XMM-Newton, which together comprise...
Croston, J.H., Pratt, G.W., Boehringer, H., Arnaud, M., Pointecouteau, E., Ponman, T.J., ...
Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory (ESO). DOI: 10.1051/0004-6361:20079154
Width of X-ray lines in cooling flows (2007)
Rebusco, P., Churazov, E., Sunyaev, R. A., Boehringer, H., Forman, W.
The dissipation of turbulent gas motions is one of the likely mechanisms that has been proposed to heat the intracluster medium (ICM) in the cores of clusters and groups of galaxies. We consider the...
Simionescu, A., Werner, N., Finoguenov, A., Boehringer, H., Brueggen, M.
We use deep (~120 ks) XMM-Newton data of the M87 halo to analyze its spatially resolved temperature structure and chemical composition. We focus particularly on the regions of enhanced X-ray...
Complex X-ray morphology of Abell 3128: A distant cluster behind a disturbed cluster (2007)
Werner, N., Churazov, E., Finoguenov, A., Markevitch, M., Burenin, R., Kaastra, J. S., ...
We present here the results of a detailed study of the X-ray properties of the cluster of galaxies Abell 3128 (z=0.06), based on the analysis of deep (100 ks) XMM-Newton data. The most obvious...
The 3D soft X-ray cluster-AGN cross-correlation function in the ROSAT NEP survey (2007)
Cappelluti, N., Boehringer, H., Schuecker, P., Pierpaoli, E., Mullis, C. R., Gioia, I. M., ...
X-ray surveys facilitate investigations of the environment of AGNs. Deep Chandra observations revealed that the AGNs source surface density rises near clusters of galaxies. The natural extension of...
X-ray source counts in the COSMOS field (2007)
Cappelluti, N., Hasinger, G., Brusa, M., Comastri, A., Zamorani, G., Boehringer, H., ...
We present the analysis of the source counts in the XMM-COSMOS survey using data of the first year of XMM-Newton observations. The survey covers ~2 deg^2 within the region of sky bounded by 9^h57.5^m
Boehringer, H., Schuecker, P., Pratt, G. W., Arnaud, M., Ponman, T. J., Croston, J. H., ...
The largest uncertainty for cosmological studies using clusters of galaxies is introduced by our limited knowledge of the statistics of galaxy cluster structure, and of the scaling relations between...
Finoguenov, A., Boehringer, H., Smith, G. P., Czoske, O., ...
We present the X-ray properties and scaling relations of a flux-limited morphology-unbiased sample of 12 X-ray luminous galaxy clusters at redshift around 0.2 based on XMM-Newton observations. The...
Guzzo, L., Cassata, P., Finoguenov, A., Massey, R., Scoville, N. Z., Capak, P., ...
We have identified a large-scale structure at z~0.73 in the COSMOS field, coherently described by the distribution of galaxy photometric redshifts, an ACS weak-lensing convergence map and the...
Finoguenov, A., Guzzo, L., Hasinger, G., Scoville, N. Z., Aussel, H., Boehringer, H., ...
We present the results of a search for galaxy clusters in the first 36 XMM-Newton pointings on the COSMOS field. We reach a depth for a total cluster flux in the 0.5-2 keV band of 3x10-15 ergs cm-2...
Guzzo, L., Cassata, P., Finoguenov, A., Massey, R., Scoville, N. Z., Capak, P., ...
We have identified a large-scale structure at z~0.73 in the COSMOS field, coherently described by the distribution of galaxy photometric redshifts, an ACS weak-lensing convergence map and the...
The XMM-Newton wide-field survey in the COSMOS field II: X-ray data and the logN-logS (2007)
Cappelluti, N., Hasinger, G., Brusa, M., Comastri, A., Zamorani, G., Boehringer, H., ...
We present the data analysis and the X-ray source counts for the first season of XMM-Newton observations in the COSMOS field. The survey covers ~2 deg^2 within the region of sky bounded by 9^h57.5^m
X-ray morphology of clusters of galaxies and its application (2007)
Hashimoto, Y., Boehringer, H., Henry, J. P., Hasinger, G., Szokoly, G.
Comparison between X-ray morphology and optical characteristics of clusters of galaxies (2007)
Hashimoto, Yasuhiro, Henry, J. P., Boehringer, H., Hasinger, G.
Temperature profiles of a representative sample of nearby x-ray galaxy clusters. (2007)
Pratt, G.W., Boehringer, H., Croston, J.H., Arnaud, M., Borgani, S., Finoguenov, A., ...
Finoguenov, A., Guzzo, L., Hasinger, G., Scoville, N. Z., Aussel, H., Boehringer, H., ...
We present the results of a search for galaxy clusters in the first 36 XMM-Newton pointings on the COSMOS field. We reach a depth for a total cluster flux in the 0.5-2 keV band of 3x10-15 ergs cm-2...
The soft X-ray Cluster-AGN spatial cross-correlation function in the ROSAT-NEP survey (2006)
Cappelluti, N., Boehringer, H., Schuecker, P., Pierpaoli, E., Mullis, C. R., Gioia, I. M., ...
X-ray surveys facilitate investigations of the environment of AGNs. Deep Chandra observations revealed that the AGNs source surface density rises near clusters of galaxies. The natural extension of...
Metal mixing by buoyant bubbles in galaxy clusters (2006)
Roediger, E., Brueggen, M., Rebusco, P., Boehringer, H., Churazov, E.
Using a series of three-dimensional, hydrodynamic simulations on an adaptive grid, we have performed a systematic study on the effect of bubble-induced motions on metallicity profiles in clusters of...
Temperature profiles of a representative sample of nearby X-ray galaxy clusters (2006)
Pratt, G. W., Boehringer, H., Croston, J. H., Arnaud, M., Borgani, S., Finoguenov, A., ...
A study of the structural and scaling properties of the temperature distribution of the hot, X-ray emitting intra-cluster medium of galaxy clusters, and its dependence on dynamical state, can give...
Effect of turbulent diffusion on iron abundance profiles (2006)
Rebusco, P., Churazov, E., Boehringer, H., Forman, W.
We compare the observed peaked iron abundance profiles for a small sample of groups and clusters with the predictions of a simple model involving the metal ejection from the brightest galaxy and the...
XMM-Newton high-resolution spectroscopy reveals the chemical evolution of M 87 (2006)
Werner, N., Boehringer, H., Kaastra, J. S., De Plaa, J., Simionescu, A., Vink, Jacco
We present here a study of chemical abundances in the giant elliptical galaxy M 87 using high-resolution spectra obtained with the Reflection Grating Spectrometers during two deep XMM-Newton...
X-ray properties in massive galaxy clusters: XMM-Newton observations of the REFLEX-DXL sample (2006)
Boehringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
We selected an unbiased, flux-limited and almost volume-complete sample of 13 distant, X-ray luminous (DXL, $z\sim 0.3$) clusters and one supplementary cluster at $z=0.2578$ from the REFLEX Survey...
Temperature profiles of a representative sample of nearby X-ray galaxy clusters. (2006)
Pratt, G.W., Boehringer, H., Croston, J.H., Arnaud, M., Borgani, S.
The C4 clustering algorithm: clusters of galaxies in the Sloan Digital Sky Survey (2005)
Miller, CJ, Nichol, RC, Reichart, D, Wechsler, RH, Evrard, AE, Annis, J, ...
We present the C4 Cluster Catalog, a new sample of 748 clusters of galaxies identified in the spectroscopic sample of the Second Data Release (DR2) of the Sloan Digital Sky Survey (SDSS). The C4...
Diffuse radio emission in a REFLEX cluster (2005)
Feretti, L., Schuecker, P., Boehringer, H., Govoni, F., Giovannini, G.
Deep Very Large Array radio observations are presented for the REFLEX clusters RXCJ0437.1+0043 and RXCJ1314.4-2515. They are at similar distance and show similar X-ray luminosity, but they are quite...
CHANDRA reveals galaxy cluster with the most massive nearby cooling core, RXCJ1504.1-0248 (2005)
Boehringer, H., Burwitz, V., Schuecker, P., Nowak, N.
A CHANDRA follow-up observation of an X-ray luminous galaxy cluster with a compact appearance, RXCJ1504.1-0248 discovered in our REFLEX Cluster Survey, reveals an object with one of the most...
XMM-Newton study of the two-dimensional structure of the REFLEX-DXL galaxy clusters (2005)
Finoguenov, A., Boehringer, H., Zhang, Y.
We carry out a two-dimensional study of temperature, entropy and pressure distributions in a nearly volume-limited subsample of REFLEX clusters at redshift 0.3, the REFLEX-DXL. We use the...
Supermassive Black Holes in Elliptical Galaxies: Switching from Very Bright to Very Dim (2005)
Churazov, E., Sazonov, S., Sunyaev, R., Forman, W., Jones, C., Boehringer, H.
Relativistic outflows (mainly observed in the radio) are a characteristic feature of both Galactic stellar mass black holes and supermassive black holes (SMBHs). Simultaneous radio and X-ray...
An X-ray Galaxy Cluster Survey for Investigations of Dark Energy (2005)
Haiman, Z., Allen, S., Bahcall, N., Bautz, M., Boehringer, H., Borgani, S., ...
The amount and nature of dark energy (DE) can be tightly constrained by measuring the spatial correlation features and evolution of a sample of ~ 100,000 galaxy clusters over the redshift range 0
Cluster scaling and its redshift evolution from XMM-Newton (2005)
Finoguenov, A., Boehringer, H., Osmond, J. P. F., Ponman, T. J., Sanderson, A. J. R., ...
We put together the results of XMM-Newton observations of a number of representative group and cluster samples at low and high redshifts. These results confirm the entropy ramp as an explanation of...
Discovery of an X-ray-Luminous Galaxy Cluster at z=1.4 (2005)
Mullis, C. R., Rosati, P., Lamer, G., Boehringer, H., Schwope, A., Schuecker, P., ...
We report the discovery of a massive, X-ray-luminous cluster of galaxies at z=1.393, the most distant X-ray-selected cluster found to date. XMMU J2235.3-2557 was serendipitously detected as an...
XMM-Newton and Gemini Observations of Eight RASSCALS Galaxy Groups (2005)
Mahdavi, A., Finoguenov, A., Boehringer, H., Geller, M. J., Henry, J. P.
We study the distribution of gas pressure and entropy in eight groups of galaxies belonging to the ROSAT All-Sky Survey / Center for Astrophysics Loose Systems (RASSCALS). We use archival and...
Further evidence for a merger in Abell 2218 from an XMM-Newton observation (2005)
Pratt, G. W., Boehringer, H., Finoguenov, A.
(Abridged) The galaxy cluster Abell 2218, at z=0.171, is well-known for the discrepancy between mass estimates derived from X-ray and strong lensing analyses. With the present XMM observation, we...
Boehringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
The precise determination of global properties of galaxy clusters, and their scaling relations, is a task of prime importance for the use of clusters as cosmological probes. We performed a detailed...
Impact of stochastic gas motions on galaxy cluster abundance profiles (2005)
Rebusco, P., Churazov, E., Boehringer, H., Forman, W.
The impact of stochastic gas motions on the metal distribution in cluster core is evaluated. Peaked abundance profiles are a characteristic feature of clusters with cool cores and abundance peaks are...
XMM-Newton study of the lensing cluster of galaxies CL0024+17 (2004)
Boehringer, H., Mellier, Y., Soucail, G., Forman, W.
We present a detailed gravitational mass measurement based on the XMM-Newton imaging spectroscopy analysis of the lensing cluster of galaxies CL0024+17 at z=0.395. The emission appears approximately...
Spatial Correlation Function of X-ray Selected AGN (2004)
Mullis, C. R., Henry, J. P., Gioia, I. M., Boehringer, H., Briel, U. G., Voges, W., ...
We present a detailed description of the first direct measurement of the spatial correlation function of X-ray selected AGN. This result is based on an X-ray flux-limited sample of 219 AGN discovered...
RXJ 1821.6+6827: a Cool Cluster at z=0.81 from the ROSAT NEP Survey (2004)
Gioia, I. M., Wolter, A., Mullis, C. R., Henry, J. P., Boehringer, H., Briel, U. G.
We present an analysis of the properties of the cluster of galaxies RXJ 1821.6+6827, or NEP 5281, at a redshift z=0.816+/-0.001. RXJ 1821.6+6827 was discovered during the optical identification of...
The ROSAT-ESO Flux Limited X-ray (REFLEX) Galaxy Cluster Survey. V. The cluster catalogue (2004)
Boehringer, H., Schuecker, P., Guzzo, L., Collins, C. A., Voges, W., Cruddace, R. G., ...
We present the catalogue of the REFLEX Cluster Survey providing information on the X-ray properties, redshifts, and some identification details of the clusters in the REFLEX sample. The catalogue...
Probing Turbulence in the Coma Galaxy Cluster (2004)
Schuecker, P., Finoguenov, A., Miniati, F., Boehringer, H., Briel, U. G.
Spatially-resolved gas pressure maps of the Coma galaxy cluster are obtained from a mosaic of XMM-Newton observations in the scale range between a resolution of 20 kpc and an extent of 2.8 Mpc. A...
Popesso, P., Boehringer, H., Brinkmann, J., Voges, W., York, D. G.
For a detailed comparison of the appearance of cluster of galaxies in X-rays and in the optical, we have compiled a comprehensive database of X-ray and optical properties of a sample of clusters...
ROSAT-SDSS Galaxy Clusters Survey. Correlating X-ray and optical properties (2004)
Popesso, P., Boehringer, H., Voges, W.
For a detailed comparison of the appearance of cluster of galaxies in X-rays and in the optical, we have compiled a comprehensive database of X-ray and optical properties of a sample of clusters...
The RASS-SDSS galaxy cluster survey (2004)
Popesso, P., Boehringer, H., Voges, W.
Solid observational evidences indicate a strong dependence of the galaxy formation and evolution on the environment. In order to study in particular the interaction between the intracluster medium...
An XMM-Newton study of the RGH 80 galaxy group (2004)
Boehringer, H., Matsushita, K.
We present an X-ray study of the galaxy group RGH 80, observed by XMM-Newton. The X-ray emission of the gas is detected out to ~ 462h^{-1}_{50} kpc, corresponding to ~ 0.45 r_{200}. The group is...
Spatial distributions of the REFLEX-DXL galaxy clusters at z~0.3 observed by XMM-Newton (2004)
Finoguenov, A., Boehringer, H., Ikebe, Y., Matsushita, K., Schuecker, P., ...
We present XMM-Newton results on the spatially resolved temperature profiles of eight massive galaxy clusters of a volume-limited sample at redshifts $z\sim0.3$ (REFLEX-DXL sample) and an additional...
Implications of the central metal abundance peak in cooling core clusters of galaxies (2004)
Boehringer, H., Matsushita, K., Churazov, E., Finoguenov, A., Ikebe, Y.
Recent XMM-Newton observations of clusters of galaxies have provided detailed information on the distribution of heavy elements in the central regions of clusters with cooling cores providing strong...
A Catalog of Compact Groups of Galaxies in the SDSS Commissioning Data (2003)
Lee, B. C., Allam, S. S., Tucker, D. L., Annis, J., Blanton, M. R., Johnston, D. E., ...
Compact groups (CGs) of galaxies -- relatively poor groups of galaxies in which the typical separations between members is of the order of a galaxy diameter -- offer an exceptional laboratory for the...
The X-ray Luminosity - Velocity Dispersion relation in the REFLEX Cluster Survey (2003)
Ortiz-Gil, A., Guzzo, L., Schuecker, P., Boehringer, H., Collins, C. A.
We present an estimate of the bolometric X-ray luminosity - velocity dispersion L_x - sigma_v relation measured from a new, large and homogeneous sample of 171 low redshift, X-ray selected galaxy...
Spatially resolved X-ray spectroscopy of cooling clusters of galaxies (2003)
Kaastra, J. S., Tamura, T., Peterson, J. R., Bleeker, J. A. M., Ferrigno, C., Kahn, S. M., ...
We present spatially resolved X-ray spectra taken with the EPIC cameras of XMM-Newton of a sample of 17 cooling clusters and three non-cooling clusters for comparison. The deprojected spectra are...
Temperature gradients in XMM-Newton observed REFLEX-DXL galaxy clusters at z~0.3 (2003)
Finoguenov, A., Boehringer, H., Ikebe, Y., Matsushita, K., Schuecker, P.
We present XMM-Newton results on the temperature profiles of a volume-limited sample of galaxy clusters at redshifts z~0.3, selected from the REFLEX survey (REFLEX-DXL sample). In the spectral...
Role of clusters of galaxies in the evolution of the metal budget in the Universe (2003)
Finoguenov, A., Burkert, A., Boehringer, H.
Using the guidelines on SN element production provided by XMM-Newton, we summarize the results of ASCA observations on the element abundance in groups and clusters of galaxies. We show that while the...
XEUS: the x-ray evolving universe spectroscopy mission (2003)
Parmar, A.N., Hasinger, G., Arnaud, M., Barcons, X., Barret, D., Blanchard, A., ...
Reproducing the entropy structure in galaxy groups (2002)
Finoguenov, A., Borgani, S., Tornatore, L., Boehringer, H.
We carry out a comparison between observations and hydrodynamic simulations of entropy profiles of groups and clusters of galaxies. We use the Tree+SPH GADGET code to simulate four halos of sizes in...
Finoguenov, A., Jones, C., Boehringer, H., Ponman, T. J.
Through a 3d-modeling of ASCA observations, we performed a spatially resolved X-ray spectroscopic study, extending to radii exceeding 150 kpc, for a sample of 9 groups of galaxies. Combined with...
Sakelliou, I., Peterson, J. R., Tamura, T., Paerels, F. B. S., Kaastra, J. S., Belsole, E., ...
We present high-resolution X-ray spectroscopic observations of M87 with the Reflection Grating Spectrometers on XMM-Newton. We detect strong K-shell line emission from N, O, Ne, Mg, some emission...
Cooling Flows as a Calorimeter of AGN Mechanical Power (2002)
Churazov, E., Sunyaev, R., Forman, W., Boehringer, H.
The assumption that radiative cooling of gas in the centers of galaxy clusters is approximately balanced by energy input from a central supermassive black hole implies that the observed X-ray...
Cruddace, R., Voges, W., Boehringer, H., Collins, C. A., Romer, A. K., MacGillivray, H., ...
A field of 1.013 ster in the ROSAT all-sky survey (RASS), centered on the south galactic pole (SGP), has been searched in a systematic, objective manner for clusters of galaxies. The procedure relied...
The REFLEX Cluster Survey: Probing the Mass Distribution in the Universe (2001)
Guzzo, L., Boehringer, H., Collins, C. A., Schuecker, P., Team, The REFLEX
We summarize some of the major results obtained so far from the REFLEX survey of X-ray clusters of galaxies, concentrating on the latest measurements of the cluster X-ray luminosity function and...
The New Emerging Model for the Structure of Cooling Cores in Clusters of Galaxies (2001)
Boehringer, H., Matsushita, K., Churazov, E., Ikebe, Y., Chen, Y.
New X-ray observations with XMM-Newton show a lack of spectral evidence for large amounts of cooling and condensing gas in the centers of galaxy clusters believed to harbour strong cooling flows. The...
The New Emerging Model for the Structure of Cooling Cores in Clusters of Galaxies (2001)
Boehringer, H., Matsushita, K., Ikebe, Y., Churazov, E.
New X-ray observations with XMM-Newton show a lack of spectral evidence for large amounts of cooling and condensing gas in the centers of galaxy clusters believed to harbour strong cooling flows....
Finoguenov, A., Matsushita, K., Boehringer, H., Ikebe, Y., Arnaud, M.
We present the results of a detailed element abundance study of hot gas in M87, observed by XMM-Newton. We choose two radial bins, 1'-3' and 8'-16' (8'-14' for EMOS; hereafter the central and the...
Schuecker, P., Boehringer, H., Reiprich, T. H., Feretti, L.
Results of a systematic study of substructure in X-ray surface brightness distributions of a combined sample of 470 REFLEX+BCS clusters of galaxies are presented. The fully automized morphology...
The REFLEX Galaxy Cluster Survey IV: The X-ray Luminosity Function (2001)
Boehringer, H., Collins, C. A., Guzzo, L., Schuecker, P., Voges, W., Neumann, D. M., ...
The X-ray galaxy cluster sample from the REFLEX Cluster Survey, which covers the X-ray brightest galaxy clusters detected in the ROSAT All-Sky Survey in the southern sky, is used to construct the...
The North Ecliptic Pole Supercluster (2001)
Mullis, C. R., Henry, J. P., Gioia, I. M., Boehringer, H., Briel, U. G., Voges, W., ...
We have used the ROSAT All-Sky Survey to detect a known supercluster at z=0.087 in the North Ecliptic Pole region. The X-ray data greatly improve our understanding of this supercluster's...
Cosmic Mass Functions from Gaussian Stochastic Diffusion Processes (2001)
Schuecker, P., Boehringer, H., Arzner, K., Reiprich, T. H.
Gaussian stochastic diffusion processes are used to derive cosmic mass functions. To get analytic relations previous studies exploited the sharp $k$-space filter assumption yielding zero drift terms...
Cluster Evolution in the ROSAT North Ecliptic Pole Survey (2001)
Gioia, I. M., Henry, J. P., Mullis, C. R., Voges, W., Briel, U. G., Boehringer, H., ...
The deepest region of the ROSAT All-Sky Survey, at the North Ecliptic Pole, has been studied to produce a complete and unbiased X-ray selected sample of clusters of galaxies. This sample is used to...
Boehringer, H., Schuecker, P., Guzzo, L., Collins, C. A., Voges, W., Schindler, S., ...
We describe the construction of an X-ray flux-limited sample of galaxy clusters, the REFLEX survey catalogue, to be used for cosmological studies. The survey is based on the ROSAT All-Sky Survey and...
XMM-Newton observations of M87 and Its X-Ray Halo (2000)
Boehringer, H., Belsole, E., Kennea, J., Matsushita, K., Molendi, S., Worrall, D. M., ...
We report performance verification observations of the giant elliptical galaxy M87 in the Virgo Cluster with the MOS, pn, and optical monitor instruments on board of XMM-Newton. With the energy...
Searching for X-ray Galaxy Clusters in the Zone of Avoidance (2000)
Boehringer, H., Schuecker, P., Komossa, S., Retzlaff, J., Reiprich, T. H., Voges, W.
Based on the ROSAT All-Sky Survey we are constructing a sample of the X-ray brightest galaxy clusters for cosmological studies. We have already completed the compilation of a sample of about 1000...
A New Radio - X-Ray Probe of Galaxy Cluster Magnetic Fields (2000)
Clarke, T. E., Kronberg, P. P., Boehringer, H.
Results are presented of a new VLA-ROSAT study that probes the magnetic field strength and distribution over a sample of 16 ``normal'' low redshift (z < 0.1) galaxy clusters. The clusters span two...
Temperature Map of the Virgo Cluster of Galaxies Observed with ASCA (2000)
Shibata, R., Matsushita, K., Yamasaki, N. Y., Ohashi, T., Ishida, M., Kikuchi, K., ...
The temperature distribution of the intracluster medium (ICM) in the Virgo cluster of galaxies has been derived from extensive mapping observations with ASCA covering an area of 19 deg^2. In the...
Details of the mass--temperature relation for clusters of galaxies (2000)
Finoguenov, A., Reiprich, T. H., Boehringer, H.
We present results on the total mass and temperature determination using two samples of clusters of galaxies. One sample is constructed with emphasis on the completeness of the sample, while the...
Optical follow-up of the REFLEX survey: a new perspective in cluster studies (2000)
Barone, L. T., Molinari, E., Boehringer, H., Chinarini, G., Collins, C. A., Guzzo, L., ...
After the completion of the catalogue built with ESO key program (REFLEX), we are beginning to explore the multiband optical characteristics of a subsample of those clusters selected in a...
Collins, C. A., Guzzo, L., Boehringer, H., Schuecker, P., Chincarini, G., Cruddace, R., ...
We report the results of the spatial two-point correlation function xi(r) for the new X-ray galaxy cluster survey REFLEX, which comprises of 452 X-ray selected clusters (449 with redshifts) detected...
Boehringer, H., Voges, W., Huchra, J. P., McLean, B., Giacconi, R., Rosati, P., ...
In the construction of an X-ray selected sample of galaxy clusters for cosmological studies, we have assembled a sample of 495 X-ray sources found to show extended X-ray emission in the first...
Detection of an X-Ray Hot Region in the Virgo Cluster of Galaxies with ASCA (2000)
Kikuchi, K., Itoh, C., Kushino, A., Furusho, T., Matsushita, K., Yamasaki, N. Y., ...
Based on mapping observations with ASCA, an unusual hot region with a spatial extent of 1 square degree was discovered between M87 and M49 at a center coordinate of R. A. = 12h 27m 36s and Dec. =...
The RASSCALS: An X-ray and Optical Study of 260 Galaxy Groups (1999)
Mahdavi, A., Boehringer, H., Geller, M. J., Ramella, M.
We describe the ROSAT All-Sky Survey-Center for Astrophysics Loose Systems (RASSCALS), the largest X-ray and optical survey of low mass galaxy groups to date. We draw 260 groups from the combined...
X-ray Clusters and the Search for Cosmic Flows (1999)
Lynam, P. D., Collins, C. A., James, P. A., Boehringer, H., Neumann, D. M.
We are engaged in an investigation of the relationship between the properties of BCG candidates and X-ray characteristics of their host clusters for a flux-limited sample of ~250 ACO clusters from...
The REFLEX Cluster Survey: Observing Strategy and First Results on Large-Scale Structure (1999)
Guzzo, L., Boehringer, H., Schuecker, P., Collins, C. A., Schindler, S., Neumann, D. M., ...
We give a general description of the optical observing strategy of the ROSAT-ESO Flux-Limited X-ray (REFLEX) cluster survey. This presently includes 460 clusters of galaxies selected from the ROSAT...
The Dynamics of Poor Systems of Galaxies (1999)
Mahdavi, A., Geller, M. J., Boehringer, H., Kurtz, M. J., Ramella, M.
We assemble and observe a sample of poor galaxy systems that is suitable for testing N-body simulations of hierarchical clustering (Navarro, Frenk, & White 1997; NFW) and other dynamical halo models...
Detection of Filamentary X-Ray Structure in the Core of the Shapley Supercluster (1998)
We report on X-ray observations of the core of the Shapley Supercluster. Combining data from pointed observations of the ROSAT PSPC detector and data from the ROSAT All-Sky Survey, the observed...
Morphology of the Virgo Cluster: Gas versus Galaxies (1998)
Schindler, S., Binggeli, B., Boehringer, H.
We draw a quantitative comparison of the distribution of the galaxies and the intra-cluster gas in the Virgo cluster by extending the morphological analysis by Binggeli et al. (1987) to the...
Andreani, P., Boehringer, H., Dall'Oglio, G., Martinis, L., Shaver, P., Lemke, R., ...
We report simultaneous observations at 1.2 and 2 mm, with a double channel photometer on the SEST Telescope, of the X-ray cluster RXJ0658-5557 in search for the Sunyaev-Zel'dovich (S-Z). The S-Z data...
An ASCA-ROSAT Study of the Distant, Lensing Cluster A2390 (1998)
Boehringer, H., Tanaka, Y., Mushotzky, R. F., Ikebe, Y., Hattori, M.
We present the results of a combined study of ASCA and ROSAT observations of the distant cluster Abell 2390.We determine the surface brightness profile and the gas density distribution of the cluster...
Hydrodynamics and stability of galactic cooling flows (1998)
Kritsuk, A., Boehringer, H., Mueller, E.
Using numerical techniques we studied the global stability of cooling flows in giant elliptical galaxies. As an initial equilibrium state we choose the hydrostatic gas recycling model (Kritsuk 1996)....
A Dynamical Study of Optically Selected Distant Clusters (1997)
Bower, Richard G., Castander, F. J., Couch, Warrick J., Ellis, R. S., Boehringer, H.
We present a programme of spectroscopic observations of galaxies in a sample of optically-selected clusters taken from the catalogue of Couch et al (1991). Previous ROSAT observations of these...
The ROSAT Brightest Cluster Sample (BCS): The cluster X-ray luminosity function within z=0.3 (1997)
Ebeling, H., Edge, A. C., Fabian, A. C., Allen, S. W., Crawford, C. S., Boehringer, H.
We present and discuss the X-ray luminosity function (XLF) of the ROSAT Brightest Cluster sample (BCS), an X-ray flux limited sample of clusters of galaxies in the northern hemisphere compiled from...
The Sunyaev-Zeldovich Effect at 1 and 2 mm towards ROSAT Clusters (1996)
Andreani, P., Dall'Oglio, G., Pizzo, L., Martinis, L., Shaver, P., Boehringer, H., ...
An observing campaign was devoted to the search for the Sunyaev-Zeldovich (S-Z) effect towards X-ray ROSAT Clusters in the millimetric spectral domain. A double channel (1.2 and 2 {\it mm})...
The radio and X-ray properties of Abell 2255 (1996)
Feretti, L., Boehringer, H., Giovannini, G., Neumann, D.
New radio and X-ray data are reported for the rich cluster Abell 2255. The cluster radio emission is characterized by the presence of a diffuse halo source, located at the cluster center, and a more...
Ebeling, H., Voges, W., Boehringer, H., Edge, A. C., Huchra, J. P., Briel, U. G.
We present an essentially complete, all-sky, X-ray flux limited sample of 242 Abell clusters of galaxies (six of which are double) compiled from ROSAT All-Sky Survey data. Our sample is...
Looking for the S-Z Effect towards Distant ROSAT Clusters of Galaxies (1996)
Andreani, P., Pizzo, L., Dall'Oglio, G., Whyborn, N., Boehringer, H., Shaver, P., ...
We report on observations of the Sunyaev-Zeldovich effect towards X-ray ROSAT clusters taken with a double channel (1.2 and 2 mm) photometer installed at the focus of the 15m SEST antenna in Chile....
Discovery of a Large Gravitational Arc in the X-ray Cluster A2280 (1995)
Gioia, I. M., Henry, J. P., Luppino, G. A., Clowe, D. I., Boehringer, H., Briel, U. G., ...
This Letter presents the serendipitous discovery of a large arc in an X-ray selected cluster detected in the Rosat North Ecliptic Pole (NEP) survey. The cluster, associated with Abell 2280, is...
A Giant Arc in a ROSAT Detected Cluster of Galaxies (1994)
Edge, A. C., Boehringer, H., Guzzo, L.
We report the serendipitous discovery of a giant grvitational arc in the Abell Supplementary cluster S295 during optical follow-up observations of clusters detected in the ROSAT All-Sky Survey. The...
Baumeister, K., Boehringer, H.
Beschrieben wird ein stapelbares Flachmagazin zum Magazinieren von wechselnden Kleinteilen. Dieses Magazin zeichnet sich durch die Kombination folgender Merkmale aus: (a) das Magazin weist einen...
Suppression of fibroblast proliferation by oral spirochetes.
Boehringer, H, Taichman, N S, Shenker, B J
Soluble sonic extracts of several strains of Treponema denticola and Treponema vincentii were examined for their abilities to alter proliferation of both murine and human fibroblasts. We found that...
Suppression of fibroblast proliferation by oral spirochetes.
Boehringer, H, Taichman, N S, Shenker, B J
Soluble sonic extracts of several strains of Treponema denticola and Treponema vincentii were examined for their abilities to alter proliferation of both murine and human fibroblasts. We found that...