Spectral statistics and local luminosity function of a complete hard X-ray sample of the brightest active galactic nuclei

被引:50
作者
Shinozaki, K
Miyaji, T
Ishisaki, Y
Ueda, Y
Ogasaka, Y
机构
[1] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan
[2] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
[3] Kyoto Univ, Dept Astron, Kyoto 6068502, Japan
[4] Nagoya Univ, Dept Astrophys, Nagoya, Aichi 4648602, Japan
关键词
galaxies : active; quasars : general; surveys; X-rays : galaxies;
D O I
10.1086/504155
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have measured the X-ray spectral properties of a complete flux-limited sample of bright active galactic nuclei (AGNs) from the HEAO-1 all-sky catalogs to investigate their statistics and provide greater constraints on the bright end of the hard X-ray luminosity function (HXLF) and the AGN population synthesis model of the X-ray background. Spectral studies using data from ASCA, XMM-Newton, and/or BeppoSAX observations have been made for almost all AGNs in this sample. The spectral measurements enable us to construct the neutral absorbing column density (log N-H) distribution and separate HXLFs for absorbed (log N-H[cm(-2)] > 21.5) and unabsorbed AGNs in the local universe. Our results show evidence of a difference in the shapes of the HXLFs of absorbed and unabsorbed AGNs in that the absorbed AGN HXLF drops more rapidly at higher luminosities than that of unabsorbed AGNs, similar to what has been previously reported. In the L-X-N-H plot we find no AGNs in the high-luminosity, high-intrinsic-absorption regime (log L-X[ergs s(-1)] > 44:5 and log N-H[cm(-2)] > 2.5) in our sample, in which we expect approximately five AGNs if we assume that the absorbed and unabsorbed AGNs have identical HXLF shapes. We also find that the fluxes observed with ASCA or XMM-Newton are smaller than that observed with HEAO-1 by a factor of 0.29 on average, which is expected for reobservation of sources with a factor of similar to 2.5 variability amplitude scale.
引用
收藏
页码:2843 / 2858
页数:16
相关论文
共 48 条
[1]   SIMULTANEOUS ANALYSIS OF SEVERAL COMPLETE SAMPLES - V-VMAX AND VE-VA VARIABLES, WITH APPLICATIONS TO QUASARS [J].
AVNI, Y ;
BAHCALL, JN .
ASTROPHYSICAL JOURNAL, 1980, 235 (03) :694-716
[2]   The cosmic evolution of hard X-ray-selected active galactic nuclei [J].
Barger, AJ ;
Cowie, LL ;
Mushotzky, RF ;
Yang, Y ;
Wang, WH ;
Steffen, AT ;
Capak, P .
ASTRONOMICAL JOURNAL, 2005, 129 (02) :578-609
[3]   Multi-wavelength study of the Seyfert 1 galaxy NGC 3783 with XMM-Newton [J].
Blustin, AJ ;
Branduardi-Raymont, G ;
Behar, E ;
Kaastra, JS ;
Kahn, SM ;
Page, MJ ;
Sako, M ;
Steenbrugge, KC .
ASTRONOMY & ASTROPHYSICS, 2002, 392 (02) :453-467
[4]  
COMASTRI A, 1995, ASTRON ASTROPHYS, V296, P1
[5]   H I IN THE GALAXY [J].
DICKEY, JM ;
LOCKMAN, FJ .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1990, 28 :215-261
[6]   ASCA observations of Seyfert 1 galaxies. III. The evidence for absorption and emission due to photoionized gas [J].
George, IM ;
Turner, TJ ;
Netzer, H ;
Nandra, K ;
Mushotzky, RF ;
Yaqoob, T .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1998, 114 (01) :73-120
[7]   X-ray observations of optically selected, radio-quiet quasars.: I.: The ASCA results [J].
George, IM ;
Turner, TJ ;
Yaqoob, T ;
Netzer, H ;
Laor, A ;
Mushotzky, RF ;
Nandra, K ;
Takahashi, T .
ASTROPHYSICAL JOURNAL, 2000, 531 (01) :52-80
[8]  
Gilli R, 2000, ASTRON ASTROPHYS, V355, P485
[9]   Testing current synthesis models of the X-ray background [J].
Gilli, R ;
Salvati, M ;
Hasinger, G .
ASTRONOMY & ASTROPHYSICS, 2001, 366 (02) :407-417
[10]   XMM-Newton observations of the Seyfert 1 galaxy ESO 141-G55 [J].
Gondoin, P ;
Orr, A ;
Lumb, D .
ASTRONOMY & ASTROPHYSICS, 2003, 398 (03) :967-973