The X-ray Emission in Low Luminosity AGNs
We find a significant anti-correlation between the hard X-ray photon in dex T and the Eddington ratio LBol/LEdd for a sample of Low-Ionization Nuclear Emission-1ine Regions (LINERs) and local Seyfert galaxies, compiled from literatures with high resolution Chandra or XMM-Newton observations. This result is contrast with the positive correlation found in luminous active galactic nuclei (AGNs), while it is similar to that of X-ray binaries (XRBs) in low/hard state. Our result is qual itatively consistent with the spectra produced from advection dominated accretion flows (ADAFs). It implies that the X-ray emission of low-luminosity active galactic nuclei (LLAGNs) may originate from the Comptonization process in ADAF, and the accretion process in LLAGNs may be similar to that of XRBs in the low/hard state, which is different from that in luminous AGNs.
accretion accretion disks galaxies active galaxies nuclei X-rays galaxies
Minfeng Gu Xinwu Cao
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China Joint Institute for Galaxy and Cosmology (JOINGC) of SHAO and USTC
国际会议
The 10th Asian-Pacific Regional International Astronomical Union Meeting(第十届亚洲及太平洋地区天文学大会 APRIM)
昆明
英文
220-222
2008-08-03（万方平台首次上网日期，不代表论文的发表时间）