Astronomical Observatory of the Jagiellonian University
Astronomical Observatory of the Jagiellonian University : National Centre for Nuclear Research, Poland
National Centre for Nuclear Research, Poland
名古屋大学
Aix-Marseille Universite
Aix-Marseille Universite
University of California, Los Angeles
著者所属（英）
Astronomical Observatory of the Jagiellonian University
Astronomical Observatory of the Jagiellonian University : National Centre for Nuclear Research, Poland
National Centre for Nuclear Research, Poland
Nagoya University
Laboratoire d'Astrophysique de Marseille : OAMP : Universite Aix-Marseille : The National Center for Scientific Research (CNRS)
Laboratoire d'Astrophysique de Marseille : OAMP : Universite Aix-Marseille : The National Center for Scientific Research (CNRS)
University of California, Los Angeles
Astronomical Observatory of the Jagiellonian University
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
347 - 350
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）
Brackets Ultra brackets Luminous Infrared Galaxies (brackets U brackets LIRGs) are a rare class of galaxies whose exact mechanisms of activity and very high dust luminosity are still under debate, with the mixed role of galaxy mergers, starburst and Active Galactic Nucleus (AGN) to be clarified. For 39 brackets U brackets LIRGs discovered in the AKARI Deep Field-South (Malek et al. 2017) we analyzed their properties and found that ULIRGs are more commonly associated with edge-on (Type 2) AGNs than LIRGs which may point out to the geometric factor in whether we detect an object as a ULIRG or LIRG. Next, we attempted to evaluate galactic density in their vicinity based on the Digital Sky Survey (DSS) data and dedicated follow-up observations by the South African Astronomical Observatory (SAAO) telescopes. We concluded that ULIRGs prefer environments with high but not extreme density while LIRGs are more often found also in denser environments. It may imply that ULIRGs appear most often in the environment of the cluster outskirts, where galaxy mergers are the most probable, and it supports the hypothesis that mergers play the crucial role in their activation.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
What makes Ultra Luminous Infrared Galaxies shine? Properties and environments of ULIRGs from the AKARI Deep Field-South
AA1730026069.pdf
(323.11KB)
