Dust spectral energy distributions of nearby galaxies: an insight from the Herschel Reference Survey

被引：144

作者：

Ciesla, L. ^{[1
,2
]}

Boquien, M. ^{[2
,3
]}

Boselli, A. ^{[2
]}

Buat, V. ^{[2
]}

Cortese, L. ^{[4
]}

Bendo, G. J. ^{[5
]}

Heinis, S. ^{[6
]}

Galametz, M. ^{[7
]}

Eales, S. ^{[8
]}

Smith, M. W. L. ^{[8
]}

Baes, M. ^{[9
]}

Bianchi, S. ^{[10
]}

de Looze, I. ^{[9
]}

Alighieri, S. di Serego ^{[10
]}

Galliano, F. ^{[11
]}

Hughes, T. M. ^{[9
]}

Madden, S. C. ^{[11
]}

Pierini, D. ^{[12
]}

Remy-Ruyer, A. ^{[11
]}

Spinoglio, L. ^{[13
]}

Vaccari, M. ^{[14
]}

Viaene, S. ^{[9
]}

Vlahakis, C. ^{[15
]}

机构：

[1] Univ Crete, Dept Phys, Iraklion 71003, Greece

[2] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[3] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[4] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[5] Univ Manchester, Sch Phys & Astron, UK ALMA Reg Ctr Node, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England

[6] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[7] European So Observ, D-85748 Garching, Germany

[8] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[9] Univ Ghent, Sterrenkundig Observ, B-9000 Ghent, Belgium

[10] INAF Osservatorio Astrofis Arcetri, I-50125 Florence, Italy

[11] CEA, CEA DSM IRFU Serv Astrophys, F-91191 Gif Sur Yvette, France

[12] Max Planck Inst Extraterr Phys MPE, D-85748 Garching, Germany

[13] INAF, Ist Fis Spazio Interplanetario, I-00133 Rome, Italy

[14] Univ Western Cape, Dept Phys, Astrophys Grp, ZA-7535 Cape Town, South Africa

[15] European So Observ, Joint ALMA Observ, Santiago 19, Chile

来源：

ASTRONOMY & ASTROPHYSICS | 2014年 / 565卷

基金：

美国国家航空航天局;

关键词：

galaxies: ISM; infrared: galaxies; dust; extinction; STAR-FORMING GALAXIES; POLYCYCLIC AROMATIC-HYDROCARBONS; MID-IR EMISSION; LOW-METALLICITY ENVIRONMENTS; FAR-INFRARED PROPERTIES; VIRGO CLUSTER; PHYSICAL-PROPERTIES; INTERSTELLAR DUST; SPIRAL GALAXIES; FORMATION RATES;

D O I：

10.1051/0004-6361/201323248

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Although it accounts only for a small fraction of the baryonic mass, dust has a profound impact on the physical processes at play in galaxies. Thus, to understand the evolution of galaxies, it is essential not only to characterize dust properties per se, but also in relation to global galaxy properties. To do so, we derive the dust properties of galaxies in a volume limited, K-band selected sample, the Herschel Reference Survey (HRS). We gather infrared photometric data from 8 mu m to 500 mu m from Spitzer, WISE, IRAS, and Herschel for all of the HRS galaxies. Draine & Li (2007, ApJ, 663, 866) models are fit to the data from which the stellar contribution has been carefully removed. We find that our photometric coverage is sufficient to constrain all of the parameters of the Draine & Li models and that a strong constraint on the 20 60 mu m range is mandatory to estimate the relative contribution of the photo-dissociation regions to the infrared spectral energy distribution (SED). The SED models tend to systematically underestimate the observed 500 mu m flux densities, especially for low-mass systems. We provide the output parameters for all of the galaxies, i.e., the minimum intensity of the interstellar radiation field, the fraction of polycyclic aromatic hydrocarbon (PAH), the relative contribution of PDR and evolved stellar population to the dust heating, the dust mass, and the infrared luminosity. For a subsample of gas-rich galaxies, we analyze the relations between these parameters and the main integrated properties of galaxies, such as stellar mass, star formation rate, infrared luminosity, metallicity, H alpha and H-band surface brightness, and the far-ultraviolet attenuation. A good correlation between the fraction of PAH and the metallicity is found, implying a weakening of the PAH emission in galaxies with low metallicities and, thus, low stellar masses. The intensity of the diffuse interstellar radiation field and the H-band and H alpha surface brightnesses are correlated, suggesting that the diffuse dust component is heated by both the young stars in star-forming regions and the diffuse evolved population. We use these results to provide a new set of infrared templates calibrated with Herschel observations on nearby galaxies and a mean SED template to provide the z = 0 reference for cosmological studies. For the same purpose, we place our sample on the SFR-M-* diagram. The templates are compared to the most popular infrared SED libraries, enlightening a large discrepancy between all of them in the 20 100 mu m range.

引用

页数：33

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