Dissecting the IRX-β dust attenuation relation: exploring the physical origin of observed variations in galaxies

被引：75

作者：

Popping, Gergoe ^{[1
]}

Puglisi, Annagrazia ^{[1
,2
]}

Norman, Colin A. ^{[3
,4
]}

机构：

[1] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

[2] Univ Padua, Dipartimento Fis & Astron, Vicolo Osservatorio 2, I-35122 Padua, Italy

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[4] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 472卷 / 02期

关键词：

dust; extinction; galaxies: high redshift; galaxies: ISM; infrared: galaxies; ultraviolet: galaxies; STAR-FORMING GALAXIES; LARGE-MAGELLANIC-CLOUD; ALMA SPECTROSCOPIC SURVEY; GIANT MOLECULAR CLOUDS; INITIAL MASS FUNCTION; ULTRA DEEP FIELD; STARBURST GALAXIES; NEARBY GALAXIES; HIGH-REDSHIFT; LUMINOSITY DENSITY;

D O I：

10.1093/mnras/stx2202

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The use of ultraviolet (UV) emission as a tracer of galaxy star formation rate (SFR) is hampered by dust obscuration. The empirical relationship between UV-slope, beta, and the ratio between far-infrared and UV luminosity, IRX, is commonly employed to account for obscured UV emission. We present a simple model that explores the physical origin of variations in the IRX-beta dust attenuation relation. A relative increase in FUV compared to NUV attenuation and an increasing stellar population age cause variations towards red UV-slopes for a fixed IRX. Dust geometry effects (turbulence, dust screen with holes, mixing of stars within the dust screen, two-component dust model) cause variations towards blue UV-slopes. Poor photometric sampling of the UV spectrum causes additional observational variations. We provide an analytic approximation for the IRX-beta relation invoking a subset of the explored physical processes (dust type, stellar population age, turbulence). We discuss observed variations in the IRX-beta relation for local (sub-galactic scales) and high-redshift (normal and dusty star-forming galaxies, galaxies during the epoch of reionization) galaxies in the context of the physical processes explored in our model. High spatial resolution imaging of the UV and sub-mm emission of galaxies can constrain the IRX-beta dust attenuation relation for different galaxy types at different epochs, where different processes causing variations may dominate. These constraints will allow the use of the IRX-beta relation to estimate intrinsic SFRs of galaxies, despite the lack of a universal relation.

引用

页码：2315 / 2333

页数：19

共 97 条

[1]

ALVAREZMARQUEZ J, 2016, A A, V587

[2] The effects of dust in simple environments: Large Magellanic Cloud HII regions [J].

Bell, EF ;

Gordon, KD ;

Kennicutt, RC ;

Zaritsky, D .

ASTROPHYSICAL JOURNAL, 2002, 565 (02) :994-1010

[3] Dust-induced systematic errors in ultraviolet-derived star formation rates [J].

Bell, EF .

ASTROPHYSICAL JOURNAL, 2002, 577 (01) :150-154

[4] The IRX-β relation on subgalactic scales in star-forming galaxies of the Herschel Reference Survey [J].

Boquien, M. ;

Buat, V. ;

Boselli, A. ;

Baes, M. ;

Bendo, G. J. ;

Ciesla, L. ;

Cooray, A. ;

Cortese, L. ;

Eales, S. ;

Gavazzi, G. ;

Gomez, H. L. ;

Lebouteiller, V. ;

Pappalardo, C. ;

Pohlen, M. ;

Smith, M. W. L. ;

Spinoglio, L. .

ASTRONOMY & ASTROPHYSICS, 2012, 539

[5] STAR-FORMING OR STARBURSTING? THE ULTRAVIOLET CONUNDRUM [J].

Boquien, M. ;

Calzetti, D. ;

Kennicutt, R. ;

Dale, D. ;

Engelbracht, C. ;

Gordon, K. D. ;

Hong, S. ;

Lee, J. C. ;

Portouw, J. .

ASTROPHYSICAL JOURNAL, 2009, 706 (01) :553-570

[6] The Herschel Reference Survey [J].

Boselli, A. ;

Eales, S. ;

Cortese, L. ;

Bendo, G. ;

Chanial, P. ;

Buat, V. ;

Davies, J. ;

Auld, R. ;

Rigby, E. ;

Baes, M. ;

Barlow, M. ;

Bock, J. ;

Bradford, M. ;

Castro-Rodriguez, N. ;

Charlot, S. ;

Clements, D. ;

Cormier, D. ;

Dwek, E. ;

Elbaz, D. ;

Galametz, M. ;

Galliano, F. ;

Gear, W. ;

Glenn, J. ;

Gomez, H. ;

Griffin, M. ;

Hony, S. ;

Isaak, K. ;

Levenson, L. ;

Lu, N. ;

Madden, S. ;

O'Halloran, B. ;

Okamura, K. ;

Oliver, S. ;

Page, M. ;

Panuzzo, P. ;

Papageorgiou, A. ;

Parkin, T. ;

Perez-Fournon, I. ;

Pohlen, M. ;

Rangwala, N. ;

Roussel, H. ;

Rykala, A. ;

Sacchi, N. ;

Sauvage, M. ;

Schulz, B. ;

Schirm, M. ;

Smith, M. W. L. ;

Spinoglio, L. ;

Stevens, J. ;

Symeonidis, M. .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2010, 122 (889) :261-287

[7] Evolution of cosmic star formation in the SCUBA-2 Cosmology Legacy Survey [J].

Bourne, N. ;

Dunlop, J. S. ;

Merlin, E. ;

Parsa, S. ;

Schreiber, C. ;

Castellano, M. ;

Conselice, C. J. ;

Coppin, K. E. K. ;

Farrah, D. ;

Fontana, A. ;

Geach, J. E. ;

Halpern, M. ;

Knudsen, K. K. ;

Michalowski, M. J. ;

Mortlock, A. ;

Santini, P. ;

Scott, D. ;

Shu, X. W. ;

Simpson, C. ;

Simpson, J. M. ;

Smith, D. J. B. ;

van der Werf, P. P. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 467 (02) :1360-1385

[8] UV LUMINOSITY FUNCTIONS AT REDSHIFTS z ∼ 4 TO z ∼ 10: 10,000 GALAXIES FROM HST LEGACY FIELDS [J].

Bouwens, R. J. ;

Illingworth, G. D. ;

Oesch, P. A. ;

Trenti, M. ;

Labbe, I. ;

Bradley, L. ;

Carollo, M. ;

van Dokkum, P. G. ;

Gonzalez, V. ;

Holwerda, B. ;

Franx, M. ;

Spitler, L. ;

Smit, R. ;

Magee, D. .

ASTROPHYSICAL JOURNAL, 2015, 803 (01) :1-49

[9] ULTRAVIOLET LUMINOSITY FUNCTIONS FROM 132 z ∼ 7 AND z ∼ 8 LYMAN-BREAK GALAXIES IN THE ULTRA-DEEP HUDF09 AND WIDE-AREA EARLY RELEASE SCIENCE WFC3/IR OBSERVATIONS [J].

Bouwens, R. J. ;

Illingworth, G. D. ;

Oesch, P. A. ;

Labbe, I. ;

Trenti, M. ;

van Dokkum, P. ;

Franx, M. ;

Stiavelli, M. ;

Carollo, C. M. ;

Magee, D. ;

Gonzalez, V. .

ASTROPHYSICAL JOURNAL, 2011, 737 (02)

[10] ALMA SPECTROSCOPIC SURVEY IN THE HUBBLE ULTRA DEEP FIELD: THE INFRARED EXCESS OF UV-SELECTED z=2-10 GALAXIES AS A FUNCTION OF UV-CONTINUUM SLOPE AND STELLAR MASS [J].

Bouwens, Rychard J. ;

Aravena, Manuel ;

Decarli, Roberto ;

Walter, Fabian ;

Da Cunha, Elisabete ;

Labbe, Ivo ;

Bauer, Franz E. ;

Bertoldi, Frank ;

Carilli, Chris ;

Chapman, Scott ;

Daddi, Emanuele ;

Hodge, Jacqueline ;

Ivison, Rob J. ;

Karim, Alex ;

Le Fevre, Olivier ;

Magnelli, Benjamin ;

Ota, Kazuaki ;

Riechers, Dominik ;

Smail, Ian R. ;

van der Werf, Paul ;

Weiss, Axel ;

Cox, Pierre ;

Elbaz, David ;

Gonzalez-Lopez, Jorge ;

Infante, Leopoldo ;

Oesch, Pascal ;

Wagg, Jeff ;

Wilkins, Steve .

ASTROPHYSICAL JOURNAL, 2016, 833 (01)

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