JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
titleThe AKARI Spectra of Luminous Infrared Galaxies in the Local Universe
Author(jpn)稲見, 華恵; 松原, 英雄; Armus, Lee; Charmandaris, Vassilis; DiazSantos, Tanio; Surace, Jason; Stierwalt, Sabrina; GOALS Team
Author(eng)Inami, Hanae; Matsuhara, Hideo; Armus, Lee; Charmandaris, Vassilis; DiazSantos, Tanio; Surace, Jason; Stierwalt, Sabrina; GOALS Team
Author Affiliation(jpn)Universite de Lyon : Universite de Lyon 1 : Ens de Lyon : CNRS : Centre de Recherche Astrophysique de Lyon (CRAL); 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); Infrared Processing and Analysis Center, California Institute of Technology (Caltech) (IPAC); Institute for Astronomy, Astrophysics, Space Applications & Remote Sensing, National Observatory of Athens : University of Crete; Universidad Diego Portales; Infrared Processing and Analysis Center, California Institute of Technology (Caltech) (IPAC); University of Virginia : National Radio Astronomy Observatory, USA; Infrared Processing and Analysis Center, California Institute of Technology (Caltech) (IPAC)
Author Affiliation(eng)Universite de Lyon : Universite de Lyon 1 : Ens de Lyon : CNRS : Centre de Recherche Astrophysique de Lyon (CRAL); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Infrared Processing and Analysis Center, California Institute of Technology (Caltech) (IPAC); Institute for Astronomy, Astrophysics, Space Applications & Remote Sensing, National Observatory of Athens : University of Crete; Universidad Diego Portales; Infrared Processing and Analysis Center, California Institute of Technology (Caltech) (IPAC); University of Virginia : National Radio Astronomy Observatory, USA; Infrared Processing and Analysis Center, California Institute of Technology (Caltech) (IPAC)
Issue Date2018-03-09
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構(JAXA)
Publication titleJAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life
宇宙航空研究開発機構特別資料
VolumeJAXA-SP-17-009E
Start page221
End page224
Publication date2018-03-09
Languageeng
AbstractWe have combined AKARI 2.5-5 micrometers and Spitzer 5.2-38 micrometers spectra of 145 local luminous infrared galaxies (LIRGs) drawn from the Great Observatories All-sky LIRG Survey (GOALS). The equivalent widths (EQWs) of the polycyclic aromatic hydrocarbon (PAH) emission features detected at 3.3 micrometers and 6.2 micrometers, the two most commonly used indicators for classifying the central energy sources (starburst or active galactic nucleus, AGN), do not appear to be linearly correlated. Moreover, about 30% of the AGN-dominated galaxies classified by the 3.3 micrometers PAH EQW are, on the contrary, suggested to be starburst-dominated galaxies by the 6.2 micrometers PAH EQW. We find that the Spitzer spectra of the sources with low 3.3 micrometers PAH EQW but high 6.2 micrometers PAH EQW are remarkably similar to the spectra of pure starburst sources. However, their 2-5 micrometers continua in AKARI spectra are much bluer, suggesting that the continuum is dominated by stellar emission rather than hot dust emission. Based on these results, we suggest a revised diagnostic using the 3.3 micrometers PAH EQW and the continuum color. We also report on a possible diagnostic with the capabilities of the James Webb Space Telescope (JWST) based on the results from the AKARI and Spitzer data.
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: active; galaxies: starburst; infrared: galaxies
Document TypeConference Paper
JAXA Category特別資料
NASA Subject CategoryAstronomy
ISSN(online)2433-2232
SHI-NOAA1730026037
Report NoJAXA-SP-17-009E
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/879204


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