The case for AGN feedback in galaxy groups (2009)
McCarthy, Ian G., Schaye, Joop, Ponman, Trevor J., Bower, Richard G., Booth, Craig M., Vecchia, Claudio Dalla, ...
[Abridged] The relatively recent insight that energy input from supermassive black holes (BHs) can have a substantial effect on the star formation rates (SFRs) of galaxies motivates us to examine its...
The accretion of galaxies into groups and clusters (2009)
McGee, Sean L., Balogh, Michael L., Bower, Richard G., Font, Andreea S., McCarthy, Ian G.
We use the galaxy stellar mass and halo merger tree information from the semi-analytic model galaxy catalogue of Font et al. (2009) to examine the accretion of galaxies into a large sample of groups...
The colour of galaxies in distant groups (2009)
Balogh, Michael L., McGee, Sean L., Wilman, Dave, Bower, Richard G., Hau, George, Morris, Simon L., ...
(Abridged) We present new optical and near-infrared imaging for a sample of 98 spectroscopically-selected galaxy groups at 0.25
Hot gas halos around disk galaxies: Confronting cosmological simulations with observations (2009)
Rasmussen, Jesper, Sommer-Larsen, Jesper, Pedersen, Kristian, Toft, Sune, Benson, Andrew, Bower, Richard G., ...
Models of disk galaxy formation commonly predict the existence of an extended reservoir of accreted hot gas surrounding massive spirals at low redshift. As a test of these models, we use X-ray and...
Davies, G. T., Gilbank, David, Glazebrook, K., Bower, Richard G., Baldry, I. K., Balogh, Michael L., ...
We use a K-selected (22.5 < K-AB < 24.0) sample of dwarf galaxies (8.4 < log(M-*/M-circle dot) < 10) at 0.89 < z < 1.15 in the Chandra Deep Field-South to measure their contribution...
A spectroscopic measure of the star formation rate density in dwarf galaxies at z∼ 1 (2009)
Davies, G. T., Gilbank, David G., Glazebrook, Karl, Bower, Richard G., Baldry, I. K., Balogh, Michael L., ...
Davies, G. T., Gilbank, David, Glazebrook, K., Bower, Richard G., Baldry, I. K., Balogh, Michael L., ...
We use a K-selected (22.5 < K-AB < 24.0) sample of dwarf galaxies (8.4 < log(M-*/M-circle dot) < 10) at 0.89 < z < 1.15 in the Chandra Deep Field-South to measure their contribution...
The colour of galaxies in distant groups (2009)
Balogh, Michael L., McGee, Sean L., Wilman, Dave, Bower, Richard G., Hau, George, Morris, Simon L., ...
We present newoptical and near-infrared imaging for a sample of 98 spectroscopically selected galaxy groups at 0.25 < z < 0.55, most of which have velocity dispersions σ < 500 km...
The colour of galaxies in distant groups (2009)
Balogh, Michael L., McGee, Sean L., Wilman, Dave, Bower, Richard G., Hau, George, Morris, Simon L., ...
The flip-side of galaxy formation: A combined model of Galaxy Formation and Cluster Heating (2008)
Bower, Richard G., McCarthy, Ian G., Benson, Andrew J.
Only ~10% of baryons in the universe are in the form of stars, yet most models of luminous structure formation have concentrated on the properties of the luminous stellar matter. In this paper we...
The Colours of Satellite Galaxies in Groups and Clusters (2008)
Font, Andreea S., Bower, Richard G., McCarthy, Ian G., Benson, Andrew J., Frenk, Carlos S., Helly, John C., ...
Current models of galaxy formation predict satellite galaxies in groups and clusters that are redder than observed. We investigate the effect on the colours of satellite galaxies produced by the ram...
Evolution in the Disks and Bulges of Group Galaxies since z=0.4 (2008)
McGee, Sean L., Balogh, Michael L., Henderson, Robert D. E., Wilman, David J., Bower, Richard G., Mulchaey, John S., ...
We present quantitative morphology measurements of a sample of optically selected group galaxies at 0.3 < z < 0.55 using the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) and the...
Testing Cold Dark Matter with the hierarchical buildup of stellar light (2008)
Balogh, Michael L., McCarthy, Ian G., Bower, Richard G., Eke, Vincent R.
(Abridged) We demonstrate that the tenet of hierarchical structure growth leads directly to a robust, falsifiable prediction for the correlation between stellar fraction (fstar) and total system mass...
Evolution in the discs and bulges of group galaxies since z= 0.4 (2008)
McGee, Sean L., Balogh, Michael L., Henderson, Robert D. E., Wilman, David J., Bower, Richard G., Mulchaey, John S., ...
Hau, George K. T., Bower, Richard G., Kilborn, Virginia, Forbes, Duncan A., Balogh, Michael L., Oosterloo, Tom
A common feature of hierarchical galaxy formation models is the process of 'inverse' morphological transformation: a bulge dominated galaxy accretes a gas disc, dramatically reducing the system's...
Hau, George K. T., Bower, Richard G., Kilborn, Virginia, Forbes, Duncan A., Balogh, Michael L., Oosterloo, Tom
A common feature of hierarchical galaxy formation models is the process of 'inverse' morphological transformation: a bulge dominated galaxy accretes a gas disc, dramatically reducing the system's...
Hau, George K. T., Bower, Richard G., Kilborn, Virginia, Forbes, Duncan A., Balogh, Michael L., Oosterloo, Tom
A common feature of hierarchical galaxy formation models is the process of 'inverse' morphological transformation: a bulge dominated galaxy accretes a gas disc, dramatically reducing the system's...
Hau, George K. T., Bower, Richard G., Kilborn, Virginia, Forbes, Duncan A., Balogh, Michael L., Oosterloo, Tom
A common feature of hierarchical galaxy formation models is the process of 'inverse' morphological transformation: a bulge dominated galaxy accretes a gas disc, dramatically reducing the system's...
The baryonic and dark matter properties of high-redshift gravitationally lensed disc galaxies (2007)
Salucci, Paolo, Swinbank, A.M., Lapi, Andrea, Yegorova, Irina A., Bower, Richard G., Smail, Ian, ...
We present a detailed study of the structural properties of four gravitationally lensed disk galaxies at z=1. Modelling the rotation curves on sub-kpc scales we derive the values for the disk mass,...
Ram pressure stripping the hot gaseous halos of galaxies in groups and clusters (2007)
McCarthy, Ian G., Frenk, Carlos S., Font, Andreea S., Lacey, Cedric G., Bower, Richard G., Mitchell, Nigel L., ...
We use a large suite of carefully controlled full hydrodynamic simulations to study the ram pressure stripping of the hot gaseous halos of galaxies as they fall into massive groups and clusters. The...
Towards a Holistic View of the Heating and Cooling of the Intracluster Medium (2007)
McCarthy, Ian G., Babul, Arif, Bower, Richard G., Balogh, Michael L.
(Abridged) X-ray clusters are conventionally divided into two classes: "cool core" (CC) clusters and "non-cool core" (NCC) clusters. Yet relatively little attention has been given to the origins of...
Okamoto, Takashi, Nemmen, Rodrigo S., Bower, Richard G.
In this paper, we present a new implementation of feedback due to active galactic nuclei (AGN) in cosmological simulations of galaxy formation. We assume that a fraction of jet energy, which is...
Modelling Shock Heating in Cluster Mergers: I. Moving Beyond the Spherical Accretion Model (2007)
McCarthy, Ian G., Bower, Richard G., Balogh, Michael L., Voit, G. Mark, Pearce, Frazer R., Theuns, Tom, ...
(Abridged) The thermal history of the intracluster medium (ICM) is complex. Heat input from cluster mergers, AGN, and galaxy winds offsets and may even halt the cooling of the ICM. Consequently, the...
The stellar mass content of distant galaxy groups (2007)
Balogh, Michael L., Wilman, Dave, Henderson, Robert D. E., Bower, Richard G., Gilbank, David, Whitaker, Richard, ...
The stellar mass content of distant galaxy groups (2007)
Balogh, Michael L., Wilman, Dave, Henderson, Robert D. E., Bower, Richard G., Gilbank, David, Whitaker, Richard, ...
We have obtained near-infrared (NIR) imaging of 58 galaxy groups, in the redshift range 0.1 < z < 0.6, from the William Herschel Telescope and from the Spitzer telescope Infrared Array Camera...
The stellar mass content of distant galaxy groups (2007)
Balogh, Michael L., Wilman, Dave, Henderson, Robert D. E., Bower, Richard G., Gilbank, David, Whitaker, Richard, ...
We have obtained near-infrared (NIR) imaging of 58 galaxy groups, in the redshift range 0.1 < z < 0.6, from the William Herschel Telescope and from the Spitzer telescope Infrared Array Camera...
Modelling the jet power in elliptical galaxies: support for rapidly spinning black holes (2006)
Nemmen, Rodrigo S., Bower, Richard G., Babul, Arif, Storchi-Bergmann, Thaisa
Recently, Allen et al. measured a tight correlation between the Bondi accretion rates and jet powers of the nuclei of nearby X-ray luminous elliptical galaxies. We employ two models of jet powering...
Models for jet power in elliptical galaxies: A case for rapidly spinning black holes (2006)
Nemmen, Rodrigo S., Bower, Richard G., Babul, Arif, Storchi-Bergmann, Thaisa
The power of jets from black holes are expected to depend on both the spin of the black hole and the structure of the accretion disk in the region of the last stable orbit. We investigate these...
Rasmussen, Jesper, Sommer-Larsen, Jesper, Pedersen, Kristian, Toft, Sune, Benson, Andrew, Bower, Richard G., ...
Models of disk galaxy formation commonly predict the existence of an extended reservoir of hot gas surrounding massive spirals at low redshift. As a test of these models, we have obtained X-ray and...
The stellar mass content of distant galaxy groups (2006)
Balogh, Michael L., Wilman, Dave, Henderson, Robert D. E., Bower, Richard G., Gilbank, David, Whitaker, Richard, ...
We have obtained near-infrared imaging of 58 galaxy groups, in the redshift range 0.1
Revisiting the Baryon Fractions of Galaxy Clusters: A Comparison with WMAP 3-year Results (2006)
McCarthy, Ian G., Bower, Richard G., Balogh, Michael L.
The universal baryonic mass fraction (Omega_b/Omega_m) can be sensitively constrained using X-ray observations of galaxy clusters. In this paper, we compare the baryonic mass fraction inferred from...
Galaxy bimodality versus stellar mass and environment (2006)
Baldry, Ivan K., Balogh, Michael L., Bower, Richard G., Glazebrook, Karl, Nichol, Robert C., Bamford, S. P., ...
Abstract not available.
Galaxy bimodality versus stellar mass and environment (2006)
Baldry, Ivan K., Balogh, Michael L., Bower, Richard G., Glazebrook, Karl, Nichol, Robert C., Bamford, S. P., ...
Abstract not available.
Galaxy bimodality versus stellar mass and environment (2006)
Baldry, Ivan K., Balogh, Michael L., Bower, Richard G., Glazebrook, Karl, Nichol, Robert C., Bamford, S. P., ...
Abstract not available.
Pedersen, Kristian, Rasmussen, Jesper, Sommer-Larsen, Jesper, Toft, Sune, Benson, Andrew J., Bower, Richard G.
Hot gaseous haloes surrounding galaxies and extending well beyond the distribution of stars are a ubiquitous prediction of galaxy formation scenarios. The haloes are believed to consist of...
Fritz, Alexander, Ziegler, Bodo L., Bower, Richard G., Smail, Ian, Davies, Roger L.
We investigate a spectroscopic sample of 48 early-type (E+S0) galaxies in the rich cluster Abell 2390 (z=0.23) and 48 E+S0 galaxies from a previously published survey of Abell 2218 (z=0.18). The...
The evolution of [O II] emission from cluster galaxies (2005)
Nakata, Fumiaki, Bower, Richard G., Balogh, Michael L., Wilman, David J.
The Evolution of [OII] Emission from Cluster Galaxies (2004)
Nakata, Fumiaki, Bower, Richard G., Balogh, Michael L., Wilman, David J.
We investigate the evolution of the star formation rate in cluster galaxies. We complement data from the CNOC1 cluster survey (0.15
Galaxy ecology : groups and low-density environments in the SDSS and 2dFGRS (2004)
Balogh, Michael L., Eke, Vince, Miller, Christopher J., Lewis, Ian, Bower, Richard G., Couch, Warrick J., ...
We analyse the observed correlation between galaxy environment and Hα emission-line strength, using volume-limited samples and group catalogues of 24 968 galaxies at 0.05 < z < 0.095,...
The bimodal galaxy color distribution: dependence on luminosity and environment (2004)
Balogh, Michael L., Baldry, Ivan K., Nichol, Robert C., Miller, Christopher J., Bower, Richard G., Glazebrook, Karl
We analyze the u - r color distribution of 24,346 galaxies with M r ≤ -18 and z < 0.08, drawn from the Sloan Digital Sky Survey first data release, as a function of luminosity and...
Galaxy ecology: groups and low-density environments in the SDSS and 2dFGRS (2004)
Balogh, Michael L., Eke, Vince, Miller, Christopher J., Lewis, Ian, Bower, Richard G., Couch, Warrick J., ...
We analyse the observed correlation between galaxy environment and Hα emission-line strength, using volume-limited samples and group catalogues of 24 968 galaxies at 0.05 < z < 0.095, drawn from the...
The bimodal galaxy color distribution: dependence on luminosity and environment (2004)
Balogh, Michael L., Baldry, Ivan K., Nichol, Robert C., Miller, Christopher J., Bower, Richard G., Glazebrook, Karl
We analyze the u - r color distribution of 24,346 galaxies with M r ≤ -18 and z < 0.08, drawn from the Sloan Digital Sky Survey first data release, as a function of luminosity and...
Gilbank, David G., Bower, Richard G., Castander, F. J., Ziegler, B. L.
Data from a new, wide field, coincident optical and X-ray survey, the X-ray Dark Cluster Survey (XDCS) are presented. This survey comprises simultaneous and independent searches for clusters of...
Bower, Richard G., Balogh, Michael L.
In this review, we take the reader on a journey. We start by looking at the properties of galaxies in the cores of rich clusters. We have focused on the overall picture: star formation in clusters is...
On the Origin of Intracluster Entropy (2003)
Voit, G. Mark, Balogh, Michael L., Bower, Richard G., Lacey, Cedric G., Bryan, Greg L.
The entropy distribution of the intracluster medium and the shape of its confining potential well completely determine the X-ray properties of a relaxed cluster of galaxies, motivating us to explore...
The Evolutionary Status of Early-type Galaxies in Abell 2390 (2003)
Fritz, Alexander, Ziegler, Bodo L., Bower, Richard G., Smail, Ian, Davies, Roger L.
We explore the evolution of the early-type galaxy population in the rich cluster Abell 2390 at z=0.23. For this purpose, we have obtained spectroscopic data of 51 elliptical and lenticular galaxies...
Modified-Entropy Models for the Intracluster Medium (2002)
Voit, G. Mark, Bryan, Greg L., Balogh, Michael L., Bower, Richard G.
We present a set of cluster models that link the present-day properties of clusters to the processes that govern galaxy formation. These models treat the entropy distribution of the intracluster...
An H-alpha survey of the rich cluster A1689 (2002)
Balogh, Michael, Couch, Warrick J., Smail, Ian, Bower, Richard G., Glazebrook, Karl
(Abridged) We present results of an H-alpha survey in the rich cluster A1689 at z=0.18, using the LDSS++ spectrograph on the AAT. We obtained spectra covering redshifted H-alpha for 522 galaxies...
Lewis, Ian, Balogh, Michael L., De Propris, Roberto, Couch, Warrick J., Bower, Richard G., Offer, Alison R., ...
We have measured the equivalent width of the Ha emission line for 11 006 galaxies brighter than Mb, = -19 (ΩΛ = 0.7, Ωm = 0.3, H0 = 70 km s-1 Mpc-1) at 0.05 < z < 0.1 in the 2dF Galaxy Redshift...
An H alpha survey of the rich cluster A 1689 (2002)
Balogh, Michael L., Couch, Warrick J., Smail, Ian R., Bower, Richard G., Glazebrook, Karl
We present results of an Hα survey in the rich cluster A 1689 at z = 0.18, using the LDSS++ spectrograph on the Anglo-Australian Telescope (AAT). We obtained spectra covering redshifted...
Lewis, Ian, Balogh, Michael L., De Propris, Roberto, Couch, Warrick J., Bower, Richard G., Offer, Alison R., ...
We have measured the equivalent width of the Ha emission line for 11 006 galaxies brighter than Mb, = -19 (ΩΛ = 0.7, Ωm = 0.3, H0 = 70 km s-1 Mpc-1) at 0.05 < z < 0.1 in the 2dF Galaxy Redshift...
An H alpha survey of the rich cluster A 1689 (2002)
Balogh, Michael L., Couch, Warrick J., Smail, Ian R., Bower, Richard G., Glazebrook, Karl
We present results of an Hα survey in the rich cluster A 1689 at z = 0.18, using the LDSS++ spectrograph on the Anglo-Australian Telescope (AAT). We obtained spectra covering redshifted Hα at z =...
Bubbles, feedback and the intra-cluster medium: three-dimensional hydrodynamic simulations (2001)
Quilis, Vicent, Bower, Richard G., Balogh, Michael L.
We use a three dimensional hydrodynamical code to simulate the effect of energy injection on cooling flows in the intracluster medium. Specifically, we compare a simulation of a 10$^{15}$ $M_\odot$...
A low global star formation rate in the rich galaxy cluster AC 114 at z=0.32 (2001)
Couch, Warrick J., Balogh, Michael L., Bower, Richard G., Smail, Ian R., Glazebrook, Karl, Taylor, Melinda
We present the results of a wide-field survey for Hα-emitting galaxies in the cluster AC 114 at z = 0.32. Spectra centered on Hα at the cluster redshift have been obtained for 586 galaxies to Itot...
A low global star formation rate in the rich galaxy cluster AC 114 at z=0.32 (2001)
Couch, Warrick J., Balogh, Michael L., Bower, Richard G., Smail, Ian R., Glazebrook, Karl, Taylor, Melinda
We present the results of a wide-field survey for Hα-emitting galaxies in the cluster AC 114 at z = 0.32. Spectra centered on Hα at the cluster redshift have been obtained for 586 galaxies to Itot...
A low global star formation rate in the rich galaxy cluster AC114 at z=0.32 (2000)
Couch, Warrick J., Balogh, Michael L., Bower, Richard G., Smail, Ian, Glazebrook, Karl, Taylor, Melinda
We present the results of a wide-field survey for H-alpha emitting galaxies in the cluster AC114 at z=0.32. Spectra centred on H-alpha at the cluster redshift have been obtained for 586 galaxies to...
Exploring the evolution of spiral galaxies (2000)
Bell, Eric F., Bower, Richard G.
We have constructed a family of simple models for spiral galaxy evolution to allow us to investigate observational trends in star formation history with galaxy parameters. The models are used to...
Discovery of the optical counterpart and early optical observations of GRB 990712 (2000)
Sahu, Kailash C., Vreeswijk, P. M., Bakos, Gaspar A., Menzies, John W., Bragaglia, Angela, Frontera, Filippo, ...
We present the discovery observations of the optical counterpart of the gamma-ray burst GRB 990712 taken 4.16 hr after the outburst and discuss its light curve observed in the V, R, and I bands...
Discovery of the optical counterpart and early optical observations of GRB 990712 (2000)
Sahu, Kailash C., Vreeswijk, P. M., Bakos, Gaspar A., Menzies, John W., Bragaglia, Angela, Frontera, Filippo, ...
We present the discovery observations of the optical counterpart of the gamma-ray burst GRB 990712 taken 4.16 hr after the outburst and discuss its light curve observed in the V, R, and I bands...
The star formation histories of low surface brightness galaxies (1999)
Bell, Eric F., Barnaby, David, Bower, Richard G., De Jong, Roelof S., Harper, Doyal A., Hereld, Mark, ...
We have performed deep imaging of a diverse sample of 26 low surface brightness galaxies (LSBGs) in the optical and the near-infrared. Using stellar population synthesis models, we find that it is...
Ram Pressure Stripping of Spiral Galaxies in Clusters (1999)
Abadi, Mario G., Moore, Ben, Bower, Richard G.
We use 3-dimensional SPH/N-BODY simulations to study ram pressure stripping of gas from spiral galaxies orbiting in clusters. We find that the analytic expectation of Gunn & Gott (1972) relating the...
The Colour-Magnitude Relation of Early-Type Galaxies in the Hubble Deep Field (1998)
Kodama, Tadayuki, Bower, Richard G., Bell, Eric F.
We present the rest-frame colour-magnitude diagram for 35 early-type galaxies in the Hubble Deep Field with median redshift 0.9. Although with considerable scatter, a red sequence well-described by...
The Formation History of Early-Type Galaxies: An Observational Perspective (1998)
Bower, Richard G., Terlevich, Ale, Kodama, Tadayuki, Caldwell, Nelson
This talk investigates the formation of early-type galaxies from a deliberately observational view point. I begin by reviewing the conclusions that can be reached by comparing the detailed properties...
Measuring \Omega_0 from the Entropy Evolution of Clusters (1998)
Kay, Scott T., Bower, Richard G.
In this paper, we have extended the entropy-driven model of cluster evolution developed by Bower (1997) in order to be able to predict the evolution of galaxy clusters for a range of cosmological...
A Bayesian Classifier for Photometric Redshifts: Identification of high redshift clusters (1998)
Kodama, Tadayuki, Bell, Eric F., Bower, Richard G.
Photometric redshift classifiers provide a means of estimating galaxy redshifts from observations using a small number of broad-band filters. However, the accuracy with which redshifts can be...
The Colour-Magnitude Relation as a Constraint on the Formation of Rich Cluster Galaxies (1998)
Bower, Richard G., Kodama, Tadayuki, Terlevich, Ale
In this paper, we examine the role that the colour-magnitude relation (CMR) can play in constraining the formation history of rich cluster galaxies. Firstly, we consider the colour evolution of...
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 Entropy-Driven X-ray Evolution of Galaxy Clusters (1997)
Observations of the evolution of the galaxy cluster X-ray luminosity function suggest that the entropy of the intra-cluster medium plays a significant role in determining the development of cluster...
A Weak Lensing Survey in the Fields of z~1 Luminous Radio Sources (1996)
In this paper we present weak lensing observations of the fields around 8 z~1 luminous radio sources. These data are searched for the lensing signatures of clusters that are either physically...
The Influence of Environmental Effects on Galaxy Formation (1995)
These notes collect together current work on the effect of the environment on galaxy formation and evolution. They are broken into four distinct parts. The first deals with the observational debate...