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QUANTIFYING THE HEATING SOURCES FOR MID-INFRARED DUST EMISSIONS IN GALAXIES: THE CASE OF M 81
Lu, N.1; Bendo, G. J.2; Boselli, A.3,4; Baes, M.5; Wu, H.6; Madden, S. C.7; De Looze, I.5; Remy-Ruyer, A.7,8; Boquien, M.9; Wilson, C. D.10; Galametz, M.11; Lam, M. I.6; Cooray, A.12; Spinoglio, L.13; Zhao, Y.1,14,15
2014-12-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume797Issue:2Pages:129
AbstractWith the newly available photometric images at 250 and 500 mu m from the Herschel Space Observatory, we study quantitative correlations over a sub-kiloparsec scale among three distinct emission components in the interstellar medium of the nearby spiral galaxy M81 (NGC 3031): (1) I-8 or I-24, the surface brightness of the mid-infrared emission observed in the Spitzer Space Telescope 8 or 24 mu m band, with I-8 and I-24 being dominated by the emissions from polycyclic aromatic hydrocarbons (PAHs) and very small grains (VSGs) of dust, respectively; (2) I-500, that of the cold dust continuum emission in the Herschel Space Observatory 500 mu m band, dominated by the emission from large dust grains heated by evolved stars; and (3) I-H alpha, a nominal surface brightness of the H alpha line emission, from gas ionized by newly formed massive stars. The results from our correlation study, free from any assumption on or modeling of dust emissivity law or dust temperatures, present solid evidence for significant heating of PAHs and VSGs by evolved stars. In the case of M81, about 67% (48%) of the 8 mu m (24 mu m) emission derives its heating from evolved stars, with the remainder attributed to radiation heating associated with ionizing stars.
KeywordGalaxies: Individual (m 81) Galaxies: Ism Galaxies: Star Formation Infrared: Galaxies Infrared: Ism Ism: Lines And bAnds
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/797/2/129
WOS KeywordDIFFUSE IONIZED-GAS ; AROMATIC-HYDROCARBON EMISSION ; STAR-FORMATION RATES ; NEAR-INFRARED CONTINUUM ; H-ALPHA ; SPIRAL GALAXIES ; INTERSTELLAR DUST ; VIRGO CLUSTER ; SMALL GRAINS ; M81
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000346291600057
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/11560
Collection分子云与恒星形成研究团组
Affiliation1.CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA
2.Univ Manchester, Sch Phys & Astron, Jordrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England
3.Univ Aix Marseille, LAM, F-13388 Marseille, France
4.CNRS, UMR7326, F-13388 Marseille, France
5.Univ Ghent, Sterrenkundig Observat, B-9000 Ghent, Belgium
6.Chinese Acad Sci, Natl Astron Observat, Key Lab Opt Astron, Beijing 100012, Peoples R China
7.Univ Paris 07, CEA, Lab AIM, IRFU Serv Astrophys, F-91191 Gif Sur Yvette, France
8.CNRS, Inst Astrophys Spatiale, UMR8617, F-91405 Orsay, France
9.Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
10.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
11.European So Observ, D-85748 Garching, Germany
12.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
13.INAF, Ist Astrofis & Planetol Spaziali, I-00133 Rome, Italy
14.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
15.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Lu, N.,Bendo, G. J.,Boselli, A.,et al. QUANTIFYING THE HEATING SOURCES FOR MID-INFRARED DUST EMISSIONS IN GALAXIES: THE CASE OF M 81[J]. ASTROPHYSICAL JOURNAL,2014,797(2):129.
APA Lu, N..,Bendo, G. J..,Boselli, A..,Baes, M..,Wu, H..,...&Zhao, Y..(2014).QUANTIFYING THE HEATING SOURCES FOR MID-INFRARED DUST EMISSIONS IN GALAXIES: THE CASE OF M 81.ASTROPHYSICAL JOURNAL,797(2),129.
MLA Lu, N.,et al."QUANTIFYING THE HEATING SOURCES FOR MID-INFRARED DUST EMISSIONS IN GALAXIES: THE CASE OF M 81".ASTROPHYSICAL JOURNAL 797.2(2014):129.
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