[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5303/PKAS.2017.32.1.185

INFRARED - X-RAY CONNECTION IN NEARBY ACTIVE GALACTIC NUCLEI; AKARI AND MAXI RESULTS

Isobe, Naoki (Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA))
Nakagawa, Takao (Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA))
Yano, Kenichi (Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA))
Baba, Shunsuke (Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA))
Oyabu, Shinki (Graduate School of Science, Nagoya University)
Toba, Yoshiki (Research Center for Space and Cosmic Evolution, Ehime University)
Ueda, Yoshihiro (Department of Astronomy, Kyoto University)
Kawamuro, Taiki (Department of Astronomy, Kyoto University)

Publication Information

Publications of The Korean Astronomical Society / v.32, no.1, 2017 , pp. 185-187 More about this Journal

Abstract

Combining the AKARI Point Source Catalog and the 37-month Monitor of All-sky X-ray Image (MAXI) catalog, the infrared and X-ray properties of nearby active galactic nuclei were investigated. The 37-month MAXI catalog tabulates 100 nearby Seyfert galaxies, 73 of which are categorized into Seyfert I galaxies. Among these Seyfert galaxies, 69 ones were found to have an AKARI infrared counterpart. For the Seyfert I galaxies in this sample, a well-known correlation was found between the infrared and X-ray luminosities. However, the observed X-ray luminosity of the Seyfert II galaxies tends to be lower for the infrared luminosity than the Seyfert I galaxies. This suggests that the X-ray absorption is significant in the Seyfert II galaxies. The Seyfert II galaxies seem to have a bimodal distribution of the IR color between $18{\mu}m$ and $90{\mu}m$ . Especially, a large fraction of the Seyfert II galaxies exhibits a redder IR color than the Seyfert I galaxies. A possible origin of the redder IR color is briefly discussed, in relation to the star formation activity in the host galaxy, and to the X-ray absorption.

Keywords

galaxies: active; infrared: galaxies; X-ray: galaxies;

Citations & Related Records

Times Cited By KSCI : 1 (Citation Analysis)

Reference
Cited By KSCI

1	Antonucci, R., 1993 Unified models for active galactic nuclei and quasars ARA&A, 31, 473 DOI
2	Gandhi, P., et al., 2009, Resolving the mid-infrared cores of local Seyferts, A&A, 502, 457 DOI
3	Hiroi, K., et al., 2013, The 37 Month MAXI/GSC Source Catalog of the High Galactic-Latitude Sky, ApJS, 207, 36 DOI
4	Ishihara, D., et al., 2010, The AKARI/IRC mid-infrared all-sky survey, A&A, 514, A1 DOI
5	Isobe, T., et al., 1990, Linear regression in astronomy, ApJ, 364, 104 DOI
6	Krolik, J. H. & Begelman, M. C., 1998, Molecular tori in Seyfert galaxies - Feeding the monster and hiding it, ApJ, 329, 702
7	Matsuta, K., et al., 2012, Infrared and Hard X-Ray Diagnostics of Active Galactic Nucleus Identication from the Swift/BAT and AKARI All-sky Surveys, 753, 104 DOI
8	Yamamura, I., et al., 2012, AKARI-FIS Point Source Catalogue: Current Status and Future Plan, PKAS, 27, 105