期刊
ASTRONOMY & ASTROPHYSICS
卷 423, 期 2, 页码 469-480出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20047150
关键词
galaxies : Seyfert; X-rays : general; galaxies : quasars : general
We compiled a sample of 95 AGNs serendipitously detected in the 3-20 keV band at Galactic latitude \b\ > 10degrees during the RXTE slew survey (XSS, Revnivtsev et al. 2004), and utilize it to study the statistical properties of the local population of AGNs, including the X-ray luminosity function and absorption distribution. We find that among low X-ray luminosity (L3-20 < 10(43.5) erg s(-1)) AGNs, the ratio of absorbed (characterized by intrinsic absorption in the range 10(22) cm(-2) < N-H < 10(24) cm(-2)) and unabsorbed (N-H < 10(22) cm(-2)) objects is 2: 1, while this ratio drops to less than 1:5 for higher luminosity AGNs. The summed X-ray output of AGNs with L3-20 > 10(41) erg s(-1) estimated here is smaller than the earlier estimated total X-ray volume emissivity in the local Universe, suggesting that a comparable X-ray flux may be produced together by lower luminosity AGNs, non-active galaxies and clusters of galaxies. Finally, we present a sample of 35 AGN candidates, composed of unidentified XSS sources.
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