Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR3k papers
- California Institute of TechnologyUS2.8k papers
- Massachusetts Institute of TechnologyUS2.5k papers
- Princeton UniversityUS2.5k papers
- The Ohio State UniversityUS2.4k papers
- University of Wisconsin–MadisonUS2.4k papers
- Space Telescope Science InstituteUS2.4k papers
- University of California, Los AngelesUS2.2k papers
- University of Maryland, College ParkUS2.2k papers
- Fermi National Accelerator LaboratoryUS2k papers
- University of California, Santa BarbaraUS2k papers
- Rutgers, The State University of New JerseyUS2k papers
43 papers · 2 filters
Dynamical Stability and Environmental Influences in Low Surface Brightness Disk Galaxies
Chris Mihos, Stacy McGaugh, Erwin de Blok
Using analytic stability criteria, we demonstrate that, due to their low surface mass density and large dark matter content, LSB disks are quite stable against the growth of global…
Dynamical Stability and Galaxy Evolution in LSB Disk Galaxies
Chris Mihos, Stacy McGaugh, Erwin de Blok
We demonstrate that, due to their low surface mass density and large dark matter content, LSB disks are quite stable against the growth of global bar modes. However, they may be on…
Molecules at high Redshift: The Evolution of the Cool Phase of Protogalactic Disks
Colin A. Norman, Marco Spaans
We study the formation of molecular hydrogen, after the epoch of re-ionization, in the context of canonical galaxy formation theory due to hierarchical clustering. There is an init…
A Measurement of the Cosmological Constant Using Elliptical Galaxies as Strong Gravitational Lenses
Myungshin Im, Richard E. Griffiths, Kavan U. Ratnatunga
We have identified seven (field) elliptical galaxies acting as strong gravitational lenses and have used them to measure cosmological parameters. To find the most likely value for…
Evolution of Structure in the Intergalactic Medium and the Nature of the Ly-alpha Forest
HongGuang Bi, Arthur F. Davidsen
We have performed a detailed statistical study of the evolution of structure in a photoionized intergalactic medium (IGM) using analytical simulations to extend the calculation int…
Perspectives for Detection of a Higgsino-like Relic Neutralino
A. Bottino, N. Fornengo, G. Mignola +2
It has been conjectured by Ambrosanio, Kane, Kribs, Martin and Mrenna (AKM) that the CDF event is due to a decay chain involving two neutrali…
QSO Absorbing Galaxies at z<~1: Deep Imaging and Spectroscopy in the Field of 3C 336
C. Steidel, M. Dickinson, D. Meyer +2
We present very deep WFPC2 images and FOS spectroscopy from the Hubble Space Telescope (HST) together with numerous supporting ground-based observations of the field of the quasar…
Superclustering at Redshift Z=0.54
A. J. Connolly, A. S. Szalay, D. C. Koo +4
We present strong evidence for the existence of a supercluster at a redshift of z=0.54 in the direction of Selected Area 68. From the distribution of galaxies with spectroscopic re…
Resolving the C IV and Mg II Absorption in NGC 4151
Gerard A. Kriss
Observations of the C IV and Mg II absorption lines in the Seyfert 1 galaxy NGC 4151 obtained with the GHRS in October 1994 are presented. The data from the STScI archive show mult…
Autofib Redshift Survey: II -- The Evolution of the Galaxy Luminosity Function by Spectral Type
Jeremy Heyl, Matthew Colless, Richard S. Ellis +1
We determine the evolution of the galaxy luminosity function (LF) as a function of spectral type using the Autofib redshift survey, a compendium of over 1700 galaxy redshifts in va…
The Spectacular Ionized Interstellar Medium of NGC55
Annette M. N. Ferguson, Rosemary F. G. Wyse, J. S. Gallagher
We present deep Halpha+[NII], [SII] (6716,6731A) and [OII] (3726,3729A) images of the highly inclined, actively star--forming SBm galaxy NGC 55, located in the nearby Sculptor Grou…
Evolution of the Ionizing Background at High Redshifts
Andrew Cooke, Brian Espey, Bob Carswell
We use a Maximum-Likelihood analysis to constrain the value and evolution of the ionizing background for 2<z<4.5, taking account of possible systematic errors. (The paper has a mor…
The Vertical Structure and Ultraviolet Spectrum of X-Ray Irradiated Accretion Disks in Active Galactic Nuclei
Mark W. Sincell, Julian H. Krolik
Motivated by recent work indicating that the UV continuum in AGN may be produced by reradiation of energy absorbed from X-rays irradiating an accretion disk, we present a calculati…
Quantitative Morphology of Moderate Redshift Galaxies : How Many Peculiars are There ?
A. Naim, K. U. Ratnatunga, R. E. Griffiths
The advent of the Hubble Space Telescope (HST) has provided images of galaxies at moderate and high redshifts and changed the scope of galaxy morphologies considerably. It is evide…
A Composite HST Spectrum of Quasars
W. Zheng, G. A. Kriss, R. C. Telfer +2
We construct a composite quasar spectrum from 284 HST FOS spectra of 101 quasars with redshifts z > 0.33. The spectrum covers the wavelengths between 350 and 3000 A in the rest fra…
Compact Nuclei in Moderately Redshifted Galaxies
Vicki L. Sarajedini, Richard F. Green, Richard E. Griffiths +1
The Hubble Space Telescope WFPC2 is being used to obtain high-resolution images in the V and I bands for several thousand distant galaxies as part of the Medium Deep Survey (MDS).…
A Study into the Feasibility of Obtaining Finite Source Sizes From MACHO-type Microlensing Light Curves
Eric Peng
Recent discussion of the effects of finite source size on high magnification microlensing events due to MACHOs motivates a study into the feasibility of observing such effects and…
A Unified View of How the Study of Emission Lines Furthers our Knowledge of AGN
Julian H. Krolik
A global view is given of how emission lines have been, and may in the future, be used to enhance our understanding of AGN. Lines from the microwave to the X-ray bands all contribu…
Helical Strands in the Jet-like Narrow Line Region of ESO 428-G14
Heino Falcke, Andrew S. Wilson, Chris Simpson +1
We present HST/WFPC2 images of the narrow line region (NLR) of the Seyfert 2 galaxy ESO 428-G14 (0714-2914, M4-1). The NLR consists of many individual, thin strands, which are very…
HUT Observations of the Lyman Limit in AGN: Implications for Unified Models
G. Kriss, J. Krolik, J. Grimes +4
We observed a total of 13 low-redshift AGN with the Hopkins Ultraviolet Telescope (HUT) during the course of the Astro-1 and Astro-2 missions. Of these, 4 show intrinsic Lyman limi…
WFPC2 Observations of the Cooling Flow Elliptical in Abell 1795
Jason Pinkney, Jon Holtzman, Chris Garasi +3
We present WFPC2 images of the core of the cooling flow cD galaxy in Abell 1795. An irregular, asymmetric dust lane extends 7 \h75 kpc in projection to the north-northwest. The dus…
A Medium-Deep Survey of a Mini-Slice at the North Galactic Pole. II. The Data
C. N. A. Willmer, D. C. Koo, N. ELlman +2
We report 328 redshifts, b magnitudes and b--r colors of galaxies measured in a redshift survey of a 4 0.67 slice close to the north Galactic p…
Luminosity Functions from Photometric Redshifts I: Techniques
M. U. SubbaRao, A. J. Connolly, A. S. Szalay +1
The determination of the galaxy luminosity function is an active and fundamental field in observational cosmology. In this paper we propose a cost effective way of measuring galaxy…
Cylotron line models for the X-ray pulsar A0535+26
R. A. Araya, A. K. Harding
The spectrum of the transient X-ray binary pulsar A0535+26 obtained by OSSE in February 1994 shows an absorption feature at 110 keV but does not confirm a feature at around 55 keV,…