output
19932026
Showing 1996 · astro-phShow all

35 papers · 2 filters

astro-ph1996★ 195 cited

CFRS XIV: Spectral Properties Of Field Galaxies Up To z = 1

F. Hammer, H. Flores, S. J. Lilly +6

The spectral properties of more than 400 CFRS galaxies and their changes over the redshift interval 0 - 1.3 are investigated. Emission line intensities and equivalent widths for ac…

astro-ph1996★ 112 cited

The Dynamical Equilibrium of Galaxy Clusters

Carlberg, Yee, Ellingson +9

If a galaxy cluster is effectively in dynamical equilibrium then all galaxy populations within the cluster must have distributions in velocity and position that individually reflec…

astro-ph1996★ 79 cited

A High Deuterium Abundance in the Early Universe

Antoinette Songaila, E. Joseph Wampler, Lennox L. Cowie

The amount of deuterium relative to hydrogen (D/H) in clouds with close to primordial abundance seen at high redshift in the spectra of distant quasars currently provides the best…

astro-ph1996★ 42 cited

The luminosity function of dwarf galaxies in four spiral-rich groups

Neil Trentham

We measure luminosity functions in the cores of four spiral-rich, poor clusters of galaxies at median redshift . In the red magnitude range -14 < M_R < -10, our data imp…

astro-ph1996

Detailed lensing properties of the MS2137-2353 core and reconstruction of sources

F. Hammer, P. Teyssandier, E. J. Shaya +3

A deep HST image of the MS 2137-2353 core has revealed detailed morphological structures in two arc systems, which are modelled and well reproduced after a complete analysis of the…

astro-ph1996★ 35 cited

X-ray QSO evolution from a very deep ROSAT survey

L. R. Jones, I. M. McHardy, M. R. Merrifield +8

In the deepest optically identified X-ray survey yet performed, we have identified 32 X-ray selected QSOs to a flux limit of 2x10^{-15} erg cm^{-2} s^{-1} (0.5-2 keV). The survey,…

astro-ph1996★ 370 cited

Weak Lensing and Cosmology

Nick Kaiser

We explore the dependence of weak lensing phenomena on the background cosmology. We first generalise the relation between , the angular power spectrum of the distortion, an…

astro-ph1996★ 116 cited

The Hawaii K-Band Galaxy Survey. II. Bright K-band Imaging

J. -S. Huang, L. L. Cowie, J. P. Gardner +3

We present the results of a wide-field K-selected galaxy survey with complementary optical I- and B-band imaging in six fields with a total coverage of 9.8 square degrees. This sur…

astro-ph1996

Galaxies at z>4.5

Esther M. Hu, Richard G. McMahon, Eiichi Egami

We present the results of ground-based and HST imaging studies targeted on z>4.5 quasar fields. High-redshift galaxies identified in deep narrow-band Lyman alpha images of the fiel…

astro-ph1996

Constraints on Galaxy Formation from Deep Galaxy Redshift Surveys and Quasar Absorption Line Studies

Lennox L. Cowie

Magnitude-limited galaxy redshift surveys are now providing large samples of galaxies to beyond z=2, while color-selected and emission-line-selected samples are finding galaxies to…

astro-ph1996★ 12 cited

Wide-field CCD imaging at CFHT: the MOCAM example

J. -C. Cuillandre, Y. Mellier, J. -P. Dupin +5

We describe a new 4096x4096 pixel CCD mosaic camera (MOCAM) available at the prime focus of the Canada-France-Hawaii Telescope (CFHT). The camera is a mosaic of four 2048x2048$ Lor…

astro-ph1996★ 79 cited

Clustering around the radio-galaxy MRC0316-257 at z=3.14

O. Le Fevre, J. M. Deltorn, D. Crampton +1

We report here the spectroscopic identification of galaxies in the neighborhood of the radio-galaxy MRC0316-257, at a redshift . Candidate cluster galaxies were selected…

astro-ph1996★ 33 cited

The Rise Times and Bolometric Light Curve of SN 1994D: Constraints on Models of Type Ia Supernovae

William D. Vacca, Bruno Leibundgut

Using the published photometry and an empirical model of the temporal evolution of the apparent magnitudes in the UBVRI passbands, we have constructed a continuous optical bolometr…

astro-ph1996

Statistics of Gravitational Microlensing Magnification. II. Three-Dimensional Lens Distribution

Man Hoi Lee, Arif Babul, Lev Kofman +1

In Paper I we studied the theory of gravitational microlensing for a planar distribution of point masses. In this second paper, we extend the analysis to a three-dimensional lens d…

astro-ph1996★ 23 cited

Statistics of Gravitational Microlensing Magnification. I. Two-Dimensional Lens Distribution

Lev Kofman, Nick Kaiser, Man Hoi Lee +1

(Abridged) In this paper we refine the theory of microlensing for a planar distribution of point masses. We derive the macroimage magnification distribution P(A) at high magnificat…

astro-ph1996★ 157 cited

Redshift clustering in the Hubble Deep Field

Judith G. Cohen, Lennox L. Cowie, David W. Hogg +4

We present initial results from a redshift survey carried out with the Low Resolution Imaging Spectrograph on the 10~m W. M. Keck Telescope in the Hubble Deep Field. In the redshif…

astro-ph1996★ 5 cited

Spectroscopy of Ultra--Steep Spectrum Radio Sources: A Sample of z>2 Radio Galaxies

H. J. A. Röttgering, R. van Ojik, G. K. Miley +3

We present spectroscopic observations for 64 radio galaxies having ultra steep radio spectra. Twenty-nine objects have redshifts , the largest redshifts being almost 4. Our ul…

astro-ph1996★ 43 cited

The Luminosity Function of Field Galaxies in the CNOC1 Redshift Survey

H. Lin, H. K. C. Yee, R. G. Carlberg +1

We have computed the luminosity function for 389 field galaxies from the Canadian Network for Observational Cosmology cluster redshift survey (CNOC1), over redshifts z = 0.2-0.6. W…

astro-ph1996★ 137 cited

Detection of Lyman-alpha Emitting Galaxies at Redshift z=4.55

Esther M. Hu, Richard G. McMahon

Studies of the formation and early history of galaxies have been hampered by the difficulties inherent in detecting faint galaxy populations at high redshift. As a consequence, obs…

astro-ph1996★ 1.6k cited

New Insight on Galaxy Formation and Evolution from Keck Spectroscopy of the Hawaii Deep Fields

Lennox L. Cowie, Antoinette Songaila, Esther M. Hu +1

We present the results of spectroscopic studies with the LRIS spectrograph on Keck of two of the Hawaii deep survey fields. The 393 objects observed cover an area of 26.2 square ar…

astro-ph1996★ 80 cited

Internal Kinematics of Galaxies at z=0.25-0.45

Luc Simard, Christopher J. Pritchet

Low-mass starbursting galaxies have been proposed as the explanation of the excess of faint galaxies observed at intermediate redshifts. If this hypothesis is correct, then interme…

astro-ph1996★ 56 cited

Optical-IR Spectral Energy Distribution of the Proto-Galaxy Candidate MS1512-cB58

E. Ellingson, H. K. C. Yee, J. Bechtold +1

The spectral energy distribution of the proto-galaxy candidate MS1512-cB58 at discovered by Yee et al. (1996) is presented. Photometry in seven bands ranging from to…

astro-ph1996★ 26 cited

The Origin of Matter in the Universe: Reheating after Inflation

Lev Kofman

In the inflationary scenario all the matter constituting the universe was created from the process of reheating after inflation. Recent development of the theory of reheating is br…

astro-ph1996★ 210 cited

Galaxy Evolution in Abell 2390

R. G. Abraham, T. A. Smecker-Hane, J. B. Hutchings +6

The galaxy population in the intermediate-redshift () rich cluster Abell 2390 is investigated. We present velocities, colors, and morphological information for an exceptio…