Buried AGNs in Nearby Ultraluminous Infrared Galaxies: The Origin of Galaxy Downsizing

被引：0
|
作者：
Imanishi, Masatoshi [1 ]
Nakagawa, Takao [1 ]
Ohyama, Yoichi [1 ]
Shirahata, Mai [1 ]
Wada, Takehiko [1 ]
Onaka, Takashi [1 ]
机构：
[1] Natl Inst Nat Sci, Natl Astron Observ Japan, Div Opt & Infrared Astron, Mitaka, Tokyo 1818588, Japan
来源：
AKARI, A LIGHT TO ILLUMINATE THE MISTY UNIVERSE | 2009年 / 418卷
关键词：
ACTIVE GALACTIC NUCLEI; ENERGY-SOURCES; SPECTROSCOPY; COLORS; SAMPLE; MASS;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the results of our systematic infrared 2.5-35 mu m low-resolution spectroscopy of ultraluminous infrared galaxies (ULIRGs), using Subaru, AKARI and Spitzer. We detected the signatures of optically-elusive, but intrinsically luminous, buried AGNs in a significant fraction of ULIRGs classified optically as non-Seyferts. The energetic importance of buried AGN increases with increasing galaxy infrared luminosity, which may support the widely-proposed AGN feedback scenario as the origin of the galaxy downsizing phenomenon.
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页码：217 / 226
页数：10
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