DUST ATTENUATION OF THE NEBULAR REGIONS OF z ∼ 2 STAR-FORMING GALAXIES: INSIGHT FROM UV, IR, AND EMISSION LINES

被引：16

作者：

De Barros, S. ^{[1
,2
]}

Reddy, N. ^{[1
]}

Shivaei, I. ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92507 USA

[2] INAF Bologna Astron Observ, Via Ranzani 1, I-40127 Bologna, Italy

来源：

ASTROPHYSICAL JOURNAL | 2016年 / 820卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

dust; extinction; galaxies: evolution; galaxies: high-redshift; galaxies: starburst; LYMAN BREAK GALAXIES; LESS-THAN; 7; STELLAR MASS DENSITY; LY-ALPHA EMISSION; FORMATION RATES; HIGH-REDSHIFT; H-ALPHA; FORMATION HISTORIES; LUMINOSITY FUNCTION; PHOTOMETRIC REDSHIFTS;

D O I：

10.3847/0004-637X/820/2/96

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use a sample of 149 spectroscopically confirmed UV-selected galaxies at z similar to 2 to investigate the relative dust attenuation of the stellar continuum and the nebular emission lines. For each galaxy in the sample, at least one rest-frame optical emission line (H alpha/[N II] lambda 6583 or [O III] lambda 5007) measurement has been taken from the litterature, and 41 galaxies have additional Spitzer/MIPS 24 mu m observations that are used to infer infrared luminosities. We use a spectral energy distribution (SED) fitting code that predicts nebular line strengths when fitting the stellar populations of galaxies in our sample, and we perform comparisons between the predictions of our models and the observed/derived physical quantities. We find that on average our code is able to reproduce all the physical quantities (e.g., UV beta slopes, infrared luminosities, emission line fluxes), but we need to apply a higher dust correction to the nebular emission compared to the stellar emission for the largest star formation rate (SFR) (log SFR/M(circle dot)yr(-1) > 1.82, Salpeter initial mass function). We find a correlation between SFR and the difference in nebular and stellar color excesses, which could resolve the discrepant results regarding nebular dust correction at z similar to 2 from previous studies.

引用

页数：15

共 97 条

[21] The mass evolution of the first galaxies: stellar mass functions and star formation rates at 4 < z < 7 in the CANDELS GOODS-South field [J].

Duncan, K. ;

Conselice, C. J. ;

Mortlock, A. ;

Hartley, W. G. ;

Guo, Y. ;

Ferguson, H. C. ;

Dave, R. ;

Lu, Y. ;

Ownsworth, J. ;

Ashby, M. L. N. ;

Dekel, A. ;

Dickinson, M. ;

Faber, S. ;

Giavalisco, M. ;

Grogin, N. ;

Kocevski, D. ;

Koekemoer, A. ;

Somerville, R. S. ;

White, C. E. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2014, 444 (03) :2960-2984

[22] The stellar, gas, and dynamical masses of star-forming galaxies at z ∼ 2 [J].

Erb, Dawn K. ;

Steidel, Charles C. ;

Shapley, Alice E. ;

Pettini, Max ;

Reddy, Naveen A. ;

Adelberger, Kurt L. .

ASTROPHYSICAL JOURNAL, 2006, 646 (01) :107-132

[23] Hα observations of a large sample of galaxies at z ∼ 2:: Implications for star formation in high-redshift galaxies [J].

Erb, Dawn K. ;

Steidel, Charles C. ;

Shapley, Alice E. ;

Pettini, Max ;

Reddy, Naveen A. ;

Adelberger, Kurt L. .

ASTROPHYSICAL JOURNAL, 2006, 647 (01) :128-139

[24] ULTRALUMINOUS INFRARED GALAXIES IN THE AKARI ALL-SKY SURVEY [J].

Eser, E. Kilerci ;

Goto, T. ;

Doi, Y. .

ASTROPHYSICAL JOURNAL, 2014, 797 (01)

[25]

Fioc M, 1997, ASTRON ASTROPHYS, V326, P950

[26] Far-infrared galaxies in the far-ultraviolet [J].

Goldader, JD ;

Meurer, G ;

Heckman, TM ;

Seibert, M ;

Sanders, DB ;

Calzetti, D ;

Steidel, CC .

ASTROPHYSICAL JOURNAL, 2002, 568 (02) :651-678

[27] THE STELLAR MASS DENSITY AND SPECIFIC STAR FORMATION RATE OF THE UNIVERSE AT z ∼ 7 [J].

Gonzalez, Valentino ;

Labbe, Ivo ;

Bouwens, Rychard J. ;

Illingworth, Garth ;

Franx, Marijn ;

Kriek, Mariska ;

Brammer, Gabriel B. .

ASTROPHYSICAL JOURNAL, 2010, 713 (01) :115-130

[28]

Holden B. P., 2014, ARXIV14015490

[29] THE FMOS-COSMOS SURVEY OF STAR-FORMING GALAXIES AT z ∼ 1.6. I. Hα-BASED STAR FORMATION RATES AND DUST EXTINCTION [J].

Kashino, D. ;

Silverman, J. D. ;

Rodighiero, G. ;

Renzini, A. ;

Arimoto, N. ;

Daddi, E. ;

Lilly, S. J. ;

Sanders, D. B. ;

Kartaltepe, J. ;

Zahid, H. J. ;

Nagao, T. ;

Sugiyama, N. ;

Capak, P. ;

Carollo, C. M. ;

Chu, J. ;

Hasinger, G. ;

Ilbert, O. ;

Kajisawa, M. ;

Kewley, L. J. ;

Koekemoer, A. M. ;

Kovac, K. ;

Le Fevre, O. ;

Masters, D. ;

McCracken, H. J. ;

Onodera, M. ;

Scoville, N. ;

Strazzullo, V. ;

Symeonidis, M. ;

Taniguchi, Y. .

ASTROPHYSICAL JOURNAL LETTERS, 2013, 777 (01)

[30] Star formation in galaxies along the Hubble sequence [J].

Kennicutt, RC .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1998, 36 :189-231

← 1 2 3 4 5 6 7 8 9 10 →