474 citations · 11.4k across the 166 of their papers we have counts for
8 papers · 1 filter
The RASSCALS: An X-ray and Optical Study of 260 Galaxy Groups
A. Mahdavi, H. Boehringer, M. J. Geller +1
We describe the ROSAT All-Sky Survey-Center for Astrophysics Loose Systems (RASSCALS), the largest X-ray and optical survey of low mass galaxy groups to date. We draw 260 groups fr…
An Imaging and Spectroscopic Survey of Galaxies within Prominent Nearby Voids. II. Morphologies, Star Formation and Faint Companions
N. A. Grogin, M. J. Geller
We assess the morphology-density relation, H-alpha linewidth-density relation, and the effects of nearby companions for 300 galaxies selected from low-density environments of the C…
An Imaging and Spectroscopic Survey of Galaxies Within Prominent Nearby Voids. I. The Sample and Luminosity Distribution
N. A. Grogin, M. J. Geller
We study the optical properties of a large sample of galaxies in low-density regions of the nearby universe. We make a 5/h Mpc-smoothed map of the galaxy density throughout the Cen…
Kinematics and Mass Profile of AWM 7
D. M. Koranyi, M. J. Geller
We have measured 492 redshifts (311 new) in the direction of the poor cluster AWM~7 and have identified 179 cluster members (73 new). We use two independent methods to derive a sel…
Tidally-Triggered Star Formation in Close Pairs of Galaxies
Elizabeth J. Barton, Margaret J. Geller, Scott J. Kenyon
We analyze new optical spectra of a sample of 502 galaxies in close pairs and n-tuples, separated by <= 50/h kpc. We extracted the sample objectively from the CfA2 redshift survey,…
The Updated Zwicky Catalog (UZC)
Emilio E. Falco, Michael J. Kurtz, Margaret J. Geller +6
The Zwicky Catalog of galaxies (ZC), with m_Zw<=15.5mag, has been the basis for the Center for Astrophysics (CfA) redshift surveys. To date, analyses of the ZC and redshift surveys…