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titleA multiwavelength study of the ISM and star formation in early-type galaxies
Author(jpn)國生, 拓摩; 金田, 英宏; Bureau, Martin; 鈴木, 仁研; 村田, 勝寛; 近藤, 晶乃; 山岸, 光義
Author(eng)Kokusho, Takuma; Kaneda, Hidehiro; Bureau, Martin; Suzuki, Toyoaki; Murata, Katsuhiro; Kondo, Akino; Yamagishi, Mitsuyoshi
Author Affiliation(jpn)名古屋大学; 名古屋大学; University of Oxford; 名古屋大学; 東京工業大学; 名古屋大学; 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)
Author Affiliation(eng)Nagoya University; Nagoya University; University of Oxford; Nagoya University; Tokyo Institute of Technology; Nagoya University; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Issue Date2018-03-09
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication titleJAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life
Start page127
End page130
Publication date2018-03-09
AbstractWe perform a systematic study of the interstellar medium (ISM) and star formation for a large sample of local early-type galaxies (ETGs) based on the AKARI all-sky maps. Our sample galaxies are the 260 ETGs from the ATLAS(sup 3D) survey, for which cold gas measurements (CO and HI) are available. Combining the AKARI measurements with the 2MASS and WISE archival data, we modeled spectral energy distributions of the ETGs to derive the total dust and polycyclic aromatic hydrocarbon luminosities, and thus total dust masses and star formation rates (SFRs). We find that the dust-to-stellar mass ratios and the current SFRs of the ETGs are smaller than those of late-type galaxies (LTGs), showing that local ETGs are quiescent galaxies. We also find that the current star formation efficiencies of the ETGs are similar to those of LTGs. Our result suggests that low SFRs of local ETGs are likely caused by their smaller amounts of the cold ISM rather than a suppression of star formation.
DescriptionMeeting Information: 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
Physical characteristics: Original contains color illustrations
会議情報: 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
形態: カラー図版あり
Keywordsgalaxies: elliptical and lenticular; galaxies: cD; galaxies: ISM; galaxies: photometry; dust; extinction; infrared: galaxies; galaxies: star formation
Document TypeConference Paper
JAXA Category特別資料
NASA Subject CategoryAstronomy
Report NoJAXA-SP-17-009E

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