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ASCA Observations of Luminous Infrared Galaxies: Evolution from Starburst to AGN?

Published online by Cambridge University Press:  25 May 2016

Takao Nakagawa ,
Tsuneo Kii ,
Ryuich Fujimoto ,
Toshiyuki Miyazaki ,
Hajime Inoue ,
Yasushi Ogasaka ,
Keith Arnaud  and
Ryohei Kawabe
Takao Nakagawa
Affiliation:
Institute of Space & Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
Tsuneo Kii
Affiliation:
Institute of Space & Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
Ryuich Fujimoto
Affiliation:
Institute of Space & Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
Toshiyuki Miyazaki
Affiliation:
Institute of Space & Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
Hajime Inoue
Affiliation:
Institute of Space & Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
Yasushi Ogasaka
Affiliation:
NASA/GSFC, Laboratory for High Energy Astrophysics, Greenbelt, MD 20771, USA
Keith Arnaud
Affiliation:
NASA/GSFC, Laboratory for High Energy Astrophysics, Greenbelt, MD 20771, USA
Ryohei Kawabe
Affiliation:
Nobeyama Radio Observatory, Nobeyama, Minamimaki, Minamisaku, Nagano 384-13, Japan

Extract

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One of the most important results of the IRAS survey is the discovery of a class of “Luminous Infrared Galaxies” (LIGs), which emit most of the energy in the infrared and are the dominant population in the local universe at luminosities above 1011L⊙ (e.g., Sanders & Mirabel 1996). All LIGs appear to be extremely rich in molecular gas, and many of them show evidence of recent interacting/merging activities. Hence it is now accepted that strong interactions of gas-rich galaxies triggers large central concentration of molecular gas, and makes optimal conditions for both enormous nuclear starbursts and building and/or fueling AGN. Actually, various observations show evidence of starburst activity as well as that of AGN in many LIGs (Sanders & Mirabel 1996).

Type
Nuclear Activity
Information
Symposium - International Astronomical Union , Volume 186: Galaxy Interactions at High and Low Redshift , 1999 , pp. 341 - 344
Copyright
Copyright © Kluwer 1999 

References

Kii, T., Nakagawa, T., Fujimoto, R., Ogasaka, Y, Miyazaki, T., Kawabe, R. & Terashima, Y. 1997, in X-Ray Imaging and Spectroscopy of Cosmic Hot Plasmas, ed. Makino, F. & Mitsuda, K. (Tokyo: Universal Academy Press), 161 Google Scholar
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