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19952026
most citedThe Demography of Massive Dark Objects in Galaxy Centres

4k citations

Showing 1997Show all

20 papers · 1 filter

astro-ph1997★ 66 cited

Optical Spectroscopy of Galactic Cirrus Clouds: Extended Red Emission in the Diffuse Interstellar Medium

Arpad Szomoru, Puragra Guhathakurta

We present initial results from the first optical spectroscopic survey of high latitude Galactic cirrus clouds. The observed shape of the cirrus spectrum does not agree with that o…

astro-ph1997★ 21 cited

Relative Sizes of X-ray and Optical Images of Elliptical Galaxies; Correlation with X-ray Luminosity

William G. Mathews, Fabrizio Brighenti

Optical parameters of elliptical galaxies are tightly correlated, but their x-ray parameters vary widely. The x-ray luminosity L_x ranges over more than an order of magnitude for e…

astro-ph1997★ 44 cited

Recent X-ray Observations and the Evolution of Hot Gas in Elliptical Galaxies: Evidence for Circumgalactic Gas

Fabrizio Brighenti, William G. Mathews

X-ray emitting gaseous halos, such as that in elliptical galaxies like NGC 4472, cannot have been produced solely from gas expelled from galactic stars. In traditional models for t…

astro-ph1997★ 28 cited

On the global warping of a thin self-gravitating near Keplerian gaseous disk with application to the disk in NGC 4258

John C. B. Papaloizou, Caroline Terquem, Doug N. C. Lin

On the global warping of a thin self-gravitating near Keplerian gaseous disk with application to the disk in NGC 4258

astro-ph1997★ 5 cited

The Luminosity Function for L>L* Galaxies at z > 3

Matthew A. Bershady, Steven R. Majewski, David C. Koo +2

Through use of multiband (U, B, R, I) photometry we have isolated high redshift (3.0<z<3.5) galaxy candidates in a survey of 1.27 deg^2 to R = 21.25 and a survey of 0.02 deg^2 to R…

astro-ph1997★ 4k cited

The Demography of Massive Dark Objects in Galaxy Centres

John Magorrian, Scott Tremaine, Douglas Richstone +9

We construct dynamical models for a sample of 36 nearby galaxies with Hubble Space Telescope photometry and ground-based kinematics. The models assume that each galaxy is axisymmet…

astro-ph1997★ 49 cited

X-Ray Observations and the Structure of Elliptical Galaxies

Fabrizio Brighenti, William G. Mathews

We compare optical and high quality x-ray data for three bright ellipticals in the Virgo cluster, NGC 4472, 4649, and 4636. The distribution of total mass in NGC 4472 and 4649 dete…

astro-ph1997★ 35 cited

Evolution of Interstellar Gas in Rapidly Rotating Elliptical Galaxies: Formation of Disks

Fabrizio Brighenti, William G. Mathews

We describe the evolution of hot interstellar gas in a family of low luminosity elliptical galaxies all having but with different degrees of flattening (E0, E2, and E6)…

astro-ph1997★ 99 cited

Rapid Bursts From GRS 1915+105 with RXTE

Ronald E. Taam, Xingming Chen, Jean H. Swank

The light curves of GRS 1915+105 observed with RXTE on October 15, 1996 reveal a wide range of transient activity including regular bursts with a recurrence time of about 1 minute,…

astro-ph1997★ 122 cited

Protostellar fragmentation in a power-law density distribution

A. Burkert, M. Bate, P. Bodenheimer

Hydrodynamical calculations in three space dimensions of the collapse of an isothermal, rotating 1 M\sol protostellar cloud are presented. The initial density stratification is a p…

astro-ph1997★ 29 cited

Self-Generated Magnetic Fields in Galactic Cooling Flows

William G. Mathews, Fabrizio Brighenti

Interstellar magnetic fields in elliptical galaxies are assumed to have their origin in stellar fields that accompany normal mass loss from an evolving population of old stars. The…

astro-ph1997★ 127 cited

Double Neutron Star Systems and Natal Neutron Star Kicks

Chris Fryer, Vassiliki Kalogera

We study the four double neutron star systems found in the Galactic disk in terms of the orbital characteristics of their immediate progenitors and the natal kicks imparted to neut…

astro-ph1997★ 20 cited

Malmquist Bias and the Distance to the Virgo Cluster

Anthony H. Gonzalez, S. M. Faber

This paper investigates the impact of Malmquist bias on the distance to the Virgo cluster determined by the H_0 Key Project using M100, and consequently on the derived value of H_0…

astro-ph1997★ 231 cited

A Pair of Lensed Galaxies at z=4.92 in the Field of CL1358+62

Marijn Franx, Garth D. Illingworth, Daniel D. Kelson +2

The cluster CL1358+62 displays a prominent red arc in WFPC2 images obtained with the Hubble Space Telescope. Keck spectra of the arc show Ly alpha emission at 7204 Angstrom, a cont…

astro-ph1997★ 244 cited

The Nature of Compact Galaxies in the Hubble Deep Field (II): Spectroscopic Properties and Implications for the Evolution of the Star Formation Rate Density of the Universe

R. Guzmán, J. Gallego, D. C. Koo +5

We present a spectroscopic study of 51 compact field galaxies with redshifts z < 1.4 and apparent magnitudes I < 23.74 in the flanking fields of the Hubble Deep Field. These galaxi…

astro-ph1997★ 117 cited

Spectroscopic Evidence for a Supermassive Black Hole in NGC 4486B

John Kormendy, Ralf Bender, John Magorrian +7

The stellar kinematics of the dwarf elliptical galaxy NGC 4486B have been measured in seeing sigma_* = .22 arcsec with the Canada-France-Hawaii Telescope. Lauer et al. 1996, ApJ, 4…

astro-ph1997★ 53 cited

Line-Strength Indices in Bright Spheroidals: Evidence for a Stellar Population Dichotomy between Spheroidal and Elliptical Galaxies

J. Gorgas, S. Pedraz, R. Guzman +2

We present new measurements of central line-strength indices (namely Mg2, <Fe>, and Hbeta and gradients for a sample of 6 bright spheroidal galaxies (Sph's) in the Virgo cluster. C…

astro-ph1997★ 141 cited

Optical Rotation Curves of Distant Field Galaxies: Sub-L* Systems

Nicole P. Vogt, Andrew C. Phillips, S. M. Faber +6

Moderate-resolution spectroscopic observations from the Keck 10m telescope are used to derive internal kinematics for eight faint disk galaxies in the fields flanking the Hubble De…

astro-ph1997★ 154 cited

Evolution of Early-Type Galaxies in Distant Clusters: The Fundamental Plane using HST Imaging and Keck Spectroscopy

Daniel D. Kelson, Pieter G. van Dokkum, Marijn Franx +2

We present new results on the Fundamental Plane of galaxies in two rich clusters, Cl1358+62 at and MS2053--04 at , based on Keck and HST observations. Our new data…

astro-ph1997★ 192 cited

A Lower Bound on the Cosmic Baryon Density

David H. Weinberg, Jordi Miralda-Escude, Lars Hernquist +1

We derive analytic lower bounds on the cosmic baryon density by requiring that the high-redshift IGM contain enough neutral hydrogen to produce the observed \lya absorption in quas…