University of California, Los Angeles
University of California, Los Angeles
東京理科大学
Aix-Marseille Universite
Aix-Marseille Universite
宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)
宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)
著者所属（英）
University of California, Los Angeles
University of California, Los Angeles
Tokyo University of Science
Aix-Marseille Universite
Aix-Marseille Universite
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
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
371 - 374
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）
We present follow-up optical DEIMOS/Keck-II spectra of in the order of 180 galaxies (median z in the order of 0.7) in the AKARI NEP-Deep field. The spectroscopic redshifts (z(sub spec)) agree well with photometric redshifts (z(sub phot)) at z less than 1, with mean absolute value of z approximately equal to 0.07, but the photometric redshifts are systematically too high at z greater than 1. One Seyfert 1.9 and one Seyfert 2 were identified from their emission lines, but no LINERs were found, in contrast to Kartaltepe et al. (2015), 84% of our objects are classified to be along the star-forming, HII sequence. At a given stellar mass, gas phase metallicities were found to be 0.1-0.2 dex lower than the local SDSS relation, but consistent with the relation found by Zahid et al. (2011) at z in the order of 0.8. Gas reddenings were derived from Balmer emission line ratios. In the majority of cases, the corresponding extinction at H alpha is in the order of 1 mag, typical of normal spiral galaxies. Star formation rates (SFRs) were estimated from the luminosities of either brackets O II brackets lambda 3727 or H alpha, and agreed reasonably (50% scatter). In galaxies with equivalent width EW(H alpha) of 10 angstroms or less, the broadband spectral energy distribution (SED) fitting significantly overestimates the SFR.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
DEIMOS Spectroscopy of Star-Forming Galaxies in the AKARI North Ecliptic Pole-Deep Field
AA1730026075.pdf
(364.34KB)
