Are Newly Discovered HI High Velocity Clouds Minihalos in the Local Group? (2009)
Giovanelli, Riccardo, Haynes, Martha P., Kent, Brian R., Adams, Elizabeth K.
A set of HI sources extracted from the north Galactic polar region by the ongoing ALFALFA survey has properties that are consistent with the interpretation that they are associated with isolated...
The Void Phenomenon Revisited (2009)
The Void Phenomenon consists in the apparent discrepancy between the number of observed dwarf halos in cosmic voids and that expected from CDM simulations. We approach the problem considering the...
Martin, Ann, Giovanelli, Riccardo, Haynes, Martha P., Saintonge, Amelie, Hoffman, G. Lyle, Kent, Brian R., ...
We present a fourth catalog of HI sources from the Arecibo Legacy Fast ALFA (ALFALFA) Survey. We report 541 detections over 136 deg2, within the region of the sky having 22h < R.A. < 03h and 24 deg <...
ΛCDM Satellites and H I companions—the Arecibo ALFA survey of NGC 2903 (2009)
Irwin, Judith A., Hoffman, G. Lyle, Spekkens, Kristine, Haynes, Martha P., Giovanelli, Riccardo, Linder, Suzanne M., ...
Kent, Brian R., Spekkens, Kristine, Giovanelli, Riccardo, Haynes, Martha P., Momjian, Emmanuel, Cortes, Juan R., ...
We present observations of an HI cloud complex most likely located in the Virgo galaxy cluster, first reported by Kent et al. (2007). The complex consists of five clouds, detected in the data set of...
A Pilot Survey of HI in Field Galaxies at Redshift z~0.2 (2008)
Catinella, Barbara, Haynes, Martha P., Giovanelli, Riccardo, Gardner, Jeffrey P., Connolly, Andrew J.
We present the first results of a targeted survey carried out with the 305 m Arecibo telescope to detect HI-line emission from galaxies at redshift z>0.16. The targets, selected from the Sloan...
The Arecibo Legacy Fast ALFA Survey: VI. Second HI Source Catalog of the Virgo Cluster Region (2008)
Kent, Brian R., Giovanelli, Riccardo, Haynes, Martha P., Martin, Ann M., Saintonge, Amélie, Stierwalt, Sabrina, ...
We present the third installment of HI sources extracted from the Arecibo Legacy Fast ALFA extragalactic survey. This dataset continues the work of the Virgo ALFALFA catalog. The catalogs and spectra...
HI Cosmology at z=0: a Brief Review (2008)
Extragalactic HI astronomy is half a century old. Its maturity dramatically increased in the 1970s, with the commissioning of new powerful facilities. Its contributions to Cosmology are important,...
Extragalactic HI Surveys at Arecibo: the Future (2008)
Starting in the 1970s, the Arecibo 305m telescope has made seminal contributions in the field of extragalactic spectroscopy. With the Gregorian upgrade completed in the late 1990s, the telescope...
ALFALFA: an Exploration of the z=0 HI Universe (2008)
The Arecibo Legacy Fast ALFA (ALFALFA) Survey is a program aimed at obtaining a census of HI-bearing objects over a cosmologically significant volume of the local Universe. It will cover 7074 square...
Gavazzi, Giuseppe, Giovanelli, Riccardo, Haynes, Martha P., Fabello, Silvia, Fumagalli, Michele, Kent, Brian R., ...
We report the results of an HI blind survey of 80deg^2 of the Virgo cluster, based on the 08deg < delta < 16 deg strip of ALFALFA, the Arecibo Legacy Fast ALFA Survey. 187 HI sources of high...
A pilot survey of H I in field galaxies at redshift z ~ 0.2 (2008)
Catinella, Barbara, Haynes, Martha P., Giovanelli, Riccardo, Gardner, Jeffrey P., Connolly, Andrew J.
Large-Scale Power Spectrum and Cosmological Parameters from SFI Peculiar Velocities (2007)
Wolfram Freudling, Idit Zehavi, Avishai Dekel, Amiram Eldar, Riccardo Giovanelli, ...
We estimate the power spectrum of mass density fluctuations from peculiar velocities of galaxies by applying an improved maximum-likelihood technique to the new all-sky SFI catalog. Parametric models...
Gary M. Bernstein, Puragra Guhathakurta, Somak Raychaudhury, Riccardo Giovanelli, Martha P. Haynes, Terry Herter, ...
We examine the precision of the Tully-Fisher relation (TFR) using a sample of galaxies in the Coma region of the sky, and find that it is good to 5 % or better in measuring relative distances. Total...
Saintonge, Amelie, Giovanelli, Riccardo, Haynes, Martha P., Hoffman, G. Lyle, Kent, Brian R., Martin, Ann M., ...
We present a second catalog of HI sources detected in the Arecibo Legacy Fast ALFA Survey. We report 488 detections over 135 square degrees, within the region of the sky having 22h
ALFALFA: HI Cosmology in the Local Universe (2007)
For the last 25 years, the 21 cm line has been used productively to investigate the large-scale structure of the Universe, its peculiar velocity field and the measurement of cosmic parameters. In...
Kent, Brian R., Giovanelli, Riccardo, Haynes, Martha P., Saintonge, Amelie, Stierwalt, Sabrina, Balonek, Thomas, ...
We report the discovery by the Arecibo Legacy Fast ALFA (ALFALFA) survey of eight HI features not coincident with stellar counterparts in the Virgo Cluster region. All of the HI clouds have cz < 3000...
NGC 4254: An Act of Harassment Uncovered by the Arecibo Legacy Fast ALFA Survey (2007)
Haynes, Martha P., Giovanelli, Riccardo, Kent, Brian R.
We present an HI map constructed from the Arecibo Legacy Fast ALFA (ALFALFA) survey of the surroundings of the strongly asymmetric Virgo cluster Sc galaxy NGC 4254. Noted previously for its lopsided...
Springob, Christopher M., Masters, Karen L., Haynes, Martha P., Giovanelli, Riccardo, Marinoni, Christian
We present the SFI++ dataset, a homogeneously derived catalog of photometric and rotational properties and the Tully-Fisher distances and peculiar velocities derived from them. We make use of digital...
The Cornell Caltech Atacama Telescope (2007)
Radford, Simon J. E., Giovanelli, Riccardo, Sebring, Thomas A., Zmuidzinas, Jonas
Cornell University, the California Institute for Technology, and the Jet Propulsion Laboratory are jointly studying the construction of a 25 m diameter telescope for submillimeter astronomy on a high...
Rotational Widths for Use in the Tully-Fisher Relation. II. The Impact of Surface Brightness (2007)
Catinella, Barbara, Haynes, Martha P., Giovanelli, Riccardo
Using a large sample of spiral galaxies for which 21 cm single-dish and/or long-slit optical spectra are available, we make a detailed comparison between various estimates of rotational widths....
Cornell Caltech Atacama Telescope (CCAT): a 25 m aperture telescope above 5000 m altitude (2006)
Sebring, Thomas A., Giovanelli, Riccardo, Radford, Simon, Zmuidzinas, Jonas
Cornell, California Institute of Technology (Caltech), and Jet Propulsion Lab (JPL) have joined together to study development of a 25 meter sub-millimeter telescope (CCAT) on a high peak in the...
SFI++ I: A New I-band Tully-Fisher Template, the Cluster Peculiar Velocity Dispersion and H0 (2006)
Masters, Karen L., Springob, Christopher M., Haynes, Martha P., Giovanelli, Riccardo
The SFI++ consists of ~5000 spiral galaxies which have measurements suitable for the application of the I-band Tully-Fisher (TF) relation. This sample builds on the SCI and SFI samples published in...
Multi-wavelength Study of Galaxy Rotation Curves and its Application to Cosmology (2006)
Saintonge, Amelie, Marinoni, Christian, Masters, Karen L., Haynes, Martha P., Giovanelli, Riccardo, Contini, Thierry
Rotation information for spiral galaxies can be obtained through the observation of different spectral lines. While the Halpha(6563 A) line is often used for galaxies with low to moderate redshifts,...
Template Rotation Curves for Disk Galaxies (2005)
Catinella, Barbara, Giovanelli, Riccardo, Haynes, Martha P.
A homogeneous sample of ~2200 low redshift disk galaxies with both high sensitivity long-slit optical spectroscopy and detailed I-band photometry is used to construct average, or template, rotation...
Multi-wavelength Study of Galaxy Rotation Curves and its Application to Cosmology (2005)
Saintonge, Amelie, Marinoni, Christian, Masters, Karen L., Haynes, Martha P., Giovanelli, Riccardo, Contini, Thierry
Rotation information for spiral galaxies can be obtained through the observation of different spectral lines. While the Halpha(6563 A) line is often used for galaxies with low to moderate redshifts,...
The Arecibo Legacy Fast ALFA Survey: II. Results of Precursor Observations (2005)
Giovanelli, Riccardo, Haynes, Martha P., Kent, Brian R., Perillat, Philip, Catinella, Barbara, Hoffman, G. Lyle, ...
In preparation for the full Arecibo Legacy Fast ALFA extragalactic HI survey, precursor observations were carried out in Aug--Sep 2004 with the 7-beam Arecibo L-band feed array (ALFA) receiver system...
The Arecibo Legacy Fast ALFA Survey: I. Science Goals, Survey Design and Strategy (2005)
Giovanelli, Riccardo, Haynes, Martha P., Kent, Brian R.
The recently initiated Arecibo Legacy Fast ALFA (ALFALFA) survey aims to map 7000 square degrees of the high galactic latitude sky visible from Arecibo, providing a HI line spectral database covering...
Rotational Widths for Use in the Tully-Fisher Relation. I. Long-slit Spectroscopic Data (2005)
Catinella, Barbara, Haynes, Martha P., Giovanelli, Riccardo
We present new long-slit Halpha spectroscopy for 403 non-interacting spiral galaxies, obtained at the Palomar Observatory 5 m Hale telescope, which is used to derive well-sampled optical rotation...
A Digital Archive of HI 21 cm Line Spectra of Optically-targeted Galaxies (2005)
Springob, Christopher M., Haynes, Martha P., Giovanelli, Riccardo, Kent, Brian R.
We present a homogeneous compilation of HI spectral parameters extracted from global 21 cm line spectra for some 9000 galaxies in the local universe (heliocentric velocity -200 < V_Sun < 28,000 km/s)...
The Cusp/Core Problem in Galactic Halos: Long-Slit Spectra for a Large Dwarf Galaxy Sample (2005)
Spekkens, Kristine, Giovanelli, Riccardo, Haynes, Martha P.
We derive inner dark matter halo density profiles for a sample of 165 low-mass galaxies using rotation curves obtained from high-quality, long-slit optical spectra assuming minimal disks and...
Multi-wavelength Study of Galaxy Rotation Curves and its Application to Cosmology (2005)
Saintonge, Amelie, Marinoni, Christian, Masters, Karen L., Haynes, Martha P., Giovanelli, Riccardo, Contini, Thierry
Rotation information for spiral galaxies can be obtained through the observation of different spectral lines. While the Halpha(6563 A) line is often used for galaxies with low to moderate redshifts,...
Multi-wavelength Study of Galaxy Rotation Curves and its Application to Cosmology (2005)
Saintonge, Amelie, Marinoni, Christian, Masters, Karen L., Haynes, Martha P., Giovanelli, Riccardo, Contini, Thierry
Rotation information for spiral galaxies can be obtained through the observation of different spectral lines. While the Halpha(6563 A) line is often used for galaxies with low to moderate redshifts,...
Morphology, Environment, and the HI Mass Function (2004)
Springob, Christopher M., Haynes, Martha P., Giovanelli, Riccardo
We exploit a large, complete optical diameter and HI flux limited sample of spiral galaxies with types later than S0a to derive a robust measurement of the HI mass function (HIMF) for masses...
Detection of 21 Centimeter HI Absorption at z = 0.78 in a Survey of Radio Continuum Sources (2004)
Darling, Jeremy, Giovanelli, Riccardo, Haynes, Martha P., Bolatto, Alberto D., Bower, Geoffrey C.
We report the detection of a deep broad HI 21 cm absorption system at z = 0.78 toward the radio source [HB89] 2351+456 (4C+45.51) at z = 1.992. The HI absorption was identified in a blind spectral...
The Impact of Distance Uncertainties on Local Luminosity and Mass Functions (2004)
Masters, Karen L., Haynes, Martha P., Giovanelli, Riccardo
In order to investigate discrepancies between recent published estimates of the the HI mass function (HIMF), we explore the impact of distance uncertainties on the derivation of the faint end slope...
Extinction Effects in Spiral Galaxy Rotation Curves (2004)
Valotto, Carlos, Giovanelli, Riccardo
Observations show that the slope of the inner part of the H$\alpha$/[NII] rotation curves of disk galaxies is depressed by extinction: at fixed luminosity, the observed slope is in fact seen to...
Vogt, Nicole P., Haynes, Martha P., Herter, Terry, Giovanelli, Riccardo
A survey of 329 nearby galaxies (redshift z < 0.045) has been conducted to study the distribution of mass and light within spiral galaxies over a range of environments. The 18 observed clusters and...
Vogt, Nicole P., Haynes, Martha P., Giovanelli, Riccardo, Herter, Terry
We have conducted a study of optical and HI properties of spiral galaxies (size, luminosity, H-alpha flux distribution, circular velocity, HI gas mass) to explore the role of gas stripping as a...
Vogt, Nicole P., Haynes, Martha P., Giovanelli, Riccardo, Herter, Terry
We have conducted a study of optical and HI properties of spiral galaxies (size, luminosity, H-alpha flux distribution, circular velocity, HI gas mass) to investigate causes (e.g., nature versus...
An estimate of \Omega_m without priors (2003)
Feldman, Hume A., Juszkiewicz, Roman, Ferreira, Pedro, Davis, Marc, Gaztanaga, Enrique, Fry, James N., ...
Using mean relative peculiar velocity measurements for pairs of galaxies, we estimate the cosmological density parameter $\Omega_m$ and the amplitude of density fluctuations $\sigma_8$. Our results...
Internal Extinction in Spiral Galaxies in the Near Infrared (2003)
Masters, Karen L., Giovanelli, Riccardo, Haynes, Martha P.
In order to study the effects of internal extinction in spiral galaxies we search for correlations of near infrared (NIR) photometric parameters with inclination. We use data from the 2 Micron...
A Search for 6.7 GHz Methanol Masers in OH Megamaser Galaxies at 0.11 (2003)
Darling, Jeremy, Goldsmith, Paul, Li, Di, Giovanelli, Riccardo
We report the results of a search for 6.7 GHz methanol (CH3OH) maser emission in OH megamaser galaxies at 0.11
A Search for OH Megamasers at z > 0.1. III. The Complete Survey (2002)
Darling, Jeremy, Giovanelli, Riccardo
We present the final results from the Arecibo Observatory OH megamaser survey. We discuss in detail the properties of the remaining 18 OH megamasers detected in the survey, including 3 redetections....
The Inner Scale Length of Spiral Galaxy Rotation Curves (2002)
Giovanelli, Riccardo, Haynes, Martha P.
We use the tapering effect of Halpha/[NII] rotation curves of spiral galaxies first noted by Goad & Roberts (1981) to investigate the internal extinction in disks. The scale length of exponential...
The OH Megamaser Luminosity Function (2002)
Darling, Jeremy, Giovanelli, Riccardo
We present the 1667 MHz OH megamaser luminosity function derived from a single flux-limited survey. The Arecibo Observatory OH megamaser (OHM) survey has doubled the number of known OH megamasers,...
The Discovery of Time Variability in OH Megamasers (2002)
Darling, Jeremy, Giovanelli, Riccardo
We report the discovery of variability in the OH megamaser in IRAS 21272+2514 at z=0.15. This is the first OH megamaser (OHM) observed to vary in time. The variation is broadband, spanning 0.5-1.5...
Giovanelli, Riccardo, Darling, Jeremy, Sarazin, Marc, Yu, Jennifer, Harvey, Paul, Henderson, Charles, ...
The region surrounding the Llano de Chajnantor, a high altitude plateau in the Atacama Desert in northern Chile, has caught the attention of the astronomical community for its potential as an...
The Optical/Infrared Astronomical Quality of High Atacama Sites. II. Infrared Characteristics (2001)
Giovanelli, Riccardo, Darling, Jeremy, Henderson, Charles, Hoffman, William, Barry, Don, Cordes, James, ...
We discuss properties of the atmospheric water vapor above the high Andean plateau region known as the Llano de Chajnantor, in the Atacama Desert of northern Chile. A combination of radiometric and...
A Search for OH Megamasers at z > 0.1. II. Further Results (2001)
Darling, Jeremy, Giovanelli, Riccardo
We present current results of an ongoing survey for OH megamasers in luminous infrared galaxies at the Arecibo Observatory. The survey is now two-thirds complete, and has resulted in the discovery of...
Optical Seeing and Infrared Atmospheric Transparency in the Upper Atacama Desert (2000)
With plans to build a large IR/optical telescope in the Atacama Desert, a site survey campaign has been underway since 1998 to characterize the optical seeing and the IR transparency in the...
Dale, Daniel A., Giovanelli, Riccardo, Haynes, Martha P., Hardy, Eduardo, Campusano, Luis E.
The environmental dependencies of the characteristics of spiral galaxy rotation curves are studied in this work. We use our large, homogeneously collected sample of 510 cluster spiral galaxy rotation...
The Arecibo OH Megamaser Survey and the Galaxy Merger Rate (2000)
Darling, Jeremy, Giovanelli, Riccardo
We present the current results of a survey for OH megamasers (OHMs) underway at the Arecibo Observatory. The survey is 2/3 complete and has produced a high OHM detection rate (1 in 6) from a...
The HI Content of Spirals. II. Gas Deficiency in Cluster Galaxies (2000)
Solanes, Jose M., Manrique, Alberto, Garcia-Gomez, Carlos, Gonzalez-Casado, Guillermo, Giovanelli, Riccardo, Haynes, Martha P.
We derive the atomic hydrogen content for a total of 1900 spirals in the fields of eighteen nearby clusters. By comparing the HI deficiency distributions of the galaxies inside of and outside of one...
Gravitational Lensing by Nearby Clusters of Galaxies (2000)
Cypriano, Eduardo S., Sodre' Jr., Laerte, Campusano, Luis E., Kneib, Jean-Paul, Giovanelli, Riccardo, Haynes, Martha P., ...
We present an estimation of the expected number of arcs and arclets in a sample of nearby (z
A Search for OH Megamasers at z > 0.1. I. Preliminary Results (2000)
Darling, Jeremy, Giovanelli, Riccardo
We present the preliminary results of a survey for OH megamasers underway at the Arecibo Observatory. The goals of the survey are to calibrate the luminosity function of OH megamasers to the...
The Convergence Depth of the Local Peculiar Velocity Field (1999)
Dale, Daniel A., Giovanelli, Riccardo
We have obtained Tully-Fisher (TF) measurements for some 3000 late-type galaxies in the field and in 76 clusters distributed throughout the sky between 10 and 200\h Mpc. The cluster data are applied...
Dale, Daniel A., Giovanelli, Riccardo, Haynes, Martha P., Campusano, Luis E., Hardy, Eduardo
We have obtained I band Tully-Fisher (TF) measurements for 522 late-type galaxies in the fields of 52 rich Abell clusters distributed throughout the sky between 50 and 200\h Mpc. Here we estimate...
Seeking the Local Convergence Depth. IV. Tully-Fisher Observations of 35 Abell Clusters (1999)
Dale, Daniel A., Giovanelli, Riccardo, Haynes, Martha P., Hardy, Eduardo, Campusano, Luis E.
We present Tully-Fisher observations for 35 rich Abell clusters of galaxies. Results from I band photometry and optical rotation curve work comprise the bulk of this paper. This is the third such...
Large-Scale Power Spectrum and Cosmological Parameters from SFI Peculiar Velocities (1999)
Freudling, Wolfram, Zehavi, Idit, Da Costa, Luiz N., Dekel, Avishai, Eldar, Amiram, Giovanelli, Riccardo, ...
We estimate the power spectrum of mass density fluctuations from peculiar velocities of galaxies by applying an improved maximum-likelihood technique to the new all-sky SFI catalog. Parametric models...
Seeking the Local Convergence Depth. The Abell Cluster Dipole Flow to 200 Mpc/h (1998)
Dale, Daniel A., Giovanelli, Riccardo, Haynes, Martha P., Campusano, Luis E., Hardy, Eduardo, Borgani, Stefano
We have obtained new Tully-Fisher (TF) peculiar velocity measurements for 52 Abell galaxy clusters distributed throughout the sky between ~ 50 and 200 Mpc/h.The measurements are based on I band...
Dale, Daniel A., Giovanelli, Riccardo, Haynes, Martha P., Scodeggio, Marco, Hardy, Eduardo, Campusano, Luis E.
We present Tully-Fisher (TF) observations for nine rich Abell clusters of galaxies. This is the second such data installment of an all-sky survey of 50 clusters in the redshift range 0.02 < z < 0.06....
Comparison of the SFI Peculiar Velocities with the IRAS 1.2 Jy Gravity Field (1997)
Da Costa, Luiz N., Nusser, Adi, Freudling, Wolfram, Giovanelli, Riccardo, Haynes, Martha P., Salzer, John J., ...
We present a comparison between the peculiar velocity fields measured from the SFI all-sky Sbc-Sc Tully-Fisher catalog and that derived from the \iras 1.2 Jy redshift survey galaxy distribution. The...
Redshift-Space Distortions and the Real-Space Clustering of Different Galaxy Types (1997)
Guzzo, Luigi, Strauss, Michael A., Fisher, Karl B., Giovanelli, Riccardo, Haynes, Martha P.
We study the distortions induced by peculiar velocities on the redshift-space correlation function of galaxies of different morphological types in the Pisces-Perseus redshift survey. Redshift-space...
Dale, Daniel A., Giovanelli, Riccardo, Haynes, Martha P., Scodeggio, Marco, Hardy, Eduardo, Campusano, Luis E.
We present first results of an all-sky observing program designed to improve the quality of the I band Tully-Fisher (TF) template and to obtain the reflex motion of the Local Group with respect to...
Spectroscopy of Edge-on Spirals (1997)
Giovanelli, Riccardo, Avera, Eric, Karachentsev, Igor
We present HI line observations of 744 edge-on spiral galaxies, extracted from the Flat Galaxy Catalog of Karachentsev et al. (1993). Fluxes, systemic velocities and line widths are given for 587...
Scodeggio, Marco, Giovanelli, Riccardo, Haynes, Martha
We show that it is possible to define a purely Photometric Fundamental Plane (PFP) for early-type galaxies. This relation is similar to the standard Fundamental Plane (FP), and is obtained by...
Redshift--Space Distortions and the Real--Space Clustering of Different Galaxy Types (1997)
Luigi Guzzo, Michael A. Strauss, Karl B. Fisher, Riccardo Giovanelli, Martha P. Haynes
We study the distortions induced by peculiar velocities on the redshift--space correlation function of galaxies of different morphological types in the Pisces--Perseus redshift survey....
Deviations from Hubble Flow in the Local Universe (1996)
Reviews observational situation in the measurement of peculiar velocities in the local universe. Emphasis is placed on such topics as: Do spirals and ellipticals yield the same peculiar velocity...
A Test of the Lauer--Postman Bulk Flow (1996)
Giovanelli, Riccardo, Haynes, Martha P., Wegner, Gary, Da Costa, Luiz N., Freudling, Wolfram, Salzer, John J.
We use Tully--Fisher distances for a sample of field late spiral galaxies to test the Lauer and Postman (1994; hereinafter LP) result suggestive of a bulk flow with respect to the Cosmic Microwave...
The I-Band Tully-Fisher Relation and the Hubble Constant (1996)
The application of the I band Tully--Fisher relation towards determining the Hubble constant is reviewed, with particular attention to the impact of scatter and bias corrections in the relation. A...
The Relative Distance between the Clusters of Galaxies A2634 and Coma (1996)
Scodeggio, Marco, Giovanelli, Riccardo, Haynes, Martha P.
The Tully-Fisher and Fundamental Plane relations are used to obtain two independent estimates of the relative distance between the clusters A2634 and Coma. Previously published studies of A2634...
The Mass Distribution in the Nearby Universe (1996)
Da Costa, Luiz N., Freudling, Wolfram, Wegner, Gary, Giovanelli, Riccardo, Haynes, Martha P., Salzer, John J.
We present a new reconstruction of the mass density and the peculiar velocity fields in the nearby universe using recent measurements of Tully-Fisher distances for a sample of late spirals. We find...
Solanes, José M., Giovanelli, Riccardo, Haynes, Martha P.
A standard parametric maximum-likelihood technique is used to determine both the probability distribution over total HI mass $M_{\rm HI}$ and the regression of this quantity on the linear optical...
Determination of Malmquist Bias and Selection Effects from Monte-Carlo Simulations (1995)
Freudling, Wolfram, Da Costa, Luiz N., Wegner, Gary, Giovanelli, Riccardo, Haynes, Martha P., Salzer, John J.
Maps of the peculiar velocity field derived from distance relations are affected by Malmquist type bias and selection effects. Because of the large number of interdependent effects, they are in most...
HI 2334+26: An Extended HI Cloud near Abell 2634 (1994)
Giovanelli, Riccardo, Scodeggio, Marco, Solanes, Jose` M., Haynes, Martha P., Arce, Hector, Sakai, Shoko
We report the serendipitous discovery of a large HI cloud with an associated HI mass of $6(\pm1.5)\times 10^9 h^{-2}$ M$_\odot$ and a heliocentric velocity 8800 \kms, located near the periphery of...
Scodeggio, Marco, Solanes, José M., Giovanelli, Riccardo, Haynes, Martha P.
A total of 663 galaxies with known redshifts in a $6\deg\!\times 6\deg$ field centered on A2634, including 211 new measurements, are used to study the structure of this cluster and its surroundings....