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The cambridge-cambridge x-ray serendipity survey: i x-ray luminous galaxies
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Elvis, M. Wilkes, B. J. Boyle, B. J. McMahon, R. G. |
| Copyright Year | 1994 |
| Description | We report on the first results obtained from a new optical identification program of 123 faint X-ray sources with S(0.5-2 keV) greater than 2 x 10(exp -14) erg/s/sq cm serendipitously detected in ROSAT PSPC pointed observations. We have spectroscopically identified the optical counterparts to more than 100 sources in this survey. Although the majority of the sample (68 objects) are QSO's, we have also identified 12 narrow emission line galaxies which have extreme X-ray luminosities (10(exp 42) less than L(sub X) less than 10(exp 43.5) erg/s). Subsequent spectroscopy reveals them to be a mixture of star-burst galaxies and Seyfert 2 galaxies in approximately equal numbers. Combined with potentially similar objects identified in the Einstein Extended Medium Sensitivity Survey, these X-ray luminous galaxies exhibit a rate of cosmological evolution, L(sub X) varies as (1 + z)(exp 2.5 +/- 1.0), consistent with that derived for X-ray QSO's. This evolution, coupled with the steep slope determined for the faint end of the X-ray luminosity function (Phi(L(sub X)) varies as L(sub X)(exp -1.9)), implies that such objects could comprise 15-35% of the soft (1-2 keV) X-ray background. |
| File Size | 649809 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960008150 |
| Archival Resource Key | ark:/13960/t3vt6kb7t |
| Language | English |
| Publisher Date | 1994-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Galactic Evolution Starburst Galaxies X Ray Spectroscopy Luminosity Spectroscopic Analysis Galactic Radiation Galactic Structure Optical Measurement Seyfert Galaxies Faint Objects Cosmology X Ray Spectra Sky Surveys Astronomy X Ray Astronomy Line Spectra Background Radiation X Ray Sources Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
