109 citations · 283 across the 10 of their papers we have counts for
Showing 2004 · astro-phShow all
3 papers · 2 filters
astro-ph2004
Chandra-SDSS Normal and Star-Forming Galaxies I: X-ray Source Properties of Galaxies Detected by Chandra in SDSS DR2
A. E. Hornschemeier, T. M. Heckman, A. F. Ptak +2
We have cross-correlated X-ray catalogs derived from archival Chandra ACIS observations with a Sloan Digital Sky Survey (SDSS) Data Release 2 (DR2) galaxy catalog to form a sample…
astro-ph2004
The Statistical Properties of Galaxies Containing ULXs
A. Ptak, E. Colbert
We present a statistical analysis of the properties of galaxies containing ultraluminous X-ray objects (ULXs). Our primary goal is to establish the fraction of galaxies containing…
astro-ph2004
Testing Radiatively-Inefficient Accretion Flow Theory: an XMM-Newton Observation of NGC 3998
A. Ptak, Y. Terashima, L. C. Ho +1
We present the results of a 10 ks XMM-Newton observation of NGC 3998, a ``type-I'' LINER galaxy. Our goal is to test the extent to which radiatively-inefficient accretion flow (RIA…