東京大学
東京大学
東京大学
Institute of Research into the Fundamental Laws of the Universe (IRFU), French Alternative Energies and Atomic Energy Commission (CEA), Universite Paris Saclay : Universite Paris Diderot, AIM, Sorbonne Paris Cite, CEA, National Center for Scientific Research (CNRS)
LERMA : Observatoire de Paris : PSL Research University : CNRS : Sorbonne Univrsite : UPMC Paris 06
著者所属（英）
The University of Tokyo
The University of Tokyo
The University of Tokyo
Institute of Research into the Fundamental Laws of the Universe (IRFU) : French Alternative Energies and Atomic Energy Commission (CEA) : Universite Paris Saclay : Universite Paris Diderot : AIM : Sorbonne Paris Cite : National Center for Scientific Research (CNRS)
LERMA : Observatoire de Paris : PSL Research University : CNRS : Sorbonne Univrsite : UPMC Paris 06
出版者
宇宙航空研究開発機構(JAXA)
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料
雑誌名(英)
JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life
巻
JAXA-SP-17-009E
ページ
333 - 336
発行年
2018-03-09
会議概要（会議名, 開催地, 会期, 主催者等）
第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京
会議概要（会議名, 開催地, 会期, 主催者等）（英）
The 4th AKARI International Conference: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (October 17-20, 2017. The University of Tokyo), Bunkyo-ku, Tokyo, Japan
抄録（英）
Based on near- to far-infrared spectral energy distribution (SED) analyses, we have investigated star-formation activities of galaxies in Hickson Compact Groups (HCGs) that indicate clear signs of interactions. The study provides us information on the effects of interactions on the galactic environments of member galaxies and their evolution. We combined AKARI slit-less 2-14 micrometers spectra and 3-24 micrometers medium-band image datasets of HCG 56 and 92, both of which show ongoing interactions, and made a comparison of the observed near- to far-infrared SEDs with the latest SED models of star-forming galaxies and AGNs. We estimated the star-formation rates (SFRs) of the member galaxies via two different methods; i) using the mid-infrared UIR band strength and ii) using the far-infrared luminosity originating from star-formation estimated from the SED model. We found a discrepancy between the SFRs derived from the two methods, in particular for the galaxies that harbor AGNs. We interpreted that this discrepancy could be due to the possible destruction of the carriers of the Unidentified InfraRed (UIR) bands in galaxies with AGNs. In the star formation rate versus stellar mass diagram, all galaxies in HCG 56 and 92 galaxies are distributed below the main sequence of the star-forming SDSS field galaxies. We conclude that the enhanced star-formation due to galaxy interactions is not seen in HCG 56 and 92, or that the star-formation seems to be rather suppressed in these groups.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
AKARI slit-less spectroscopy and broadband infrared photometry observations of Hickson Compact Groups 56 and 92
AA1730026065.pdf
(852.51KB)
