Revealing the Stellar Mass and Dust Distributions of Submillimeter Galaxies at Redshift 2

被引：61

作者：

Lang, Philipp ^{[1
]}

Schinnerer, E. ^{[1
]}

Smail, Ian ^{[2
]}

Dudzeviciute, U. ^{[2
]}

Swinbank, A. M. ^{[2
]}

Liu, Daizhong ^{[1
]}

Leslie, S. K. ^{[1
]}

Almaini, O. ^{[3
]}

An, Fang Xia ^{[2
,4
]}

Bertoldi, F. ^{[5
]}

Blain, A. W. ^{[6
]}

Chapman, S. C. ^{[7
]}

Chen, Chian-Chou ^{[8
]}

Conselice, C. ^{[9
]}

Cooke, E. A. ^{[2
]}

Coppin, K. E. K. ^{[10
]}

Dunlop, J. S. ^{[11
]}

Farrah, D. ^{[12
,13
]}

Fudamoto, Y. ^{[14
]}

Geach, J. E. ^{[10
]}

Gullberg, B. ^{[2
]}

Harrington, K. C. ^{[5
]}

Hodge, J. A. ^{[15
]}

Ivison, R. J. ^{[8
,11
]}

Jimenez-Andrade, E. F. ^{[16
,17
]}

Magnelli, B. ^{[5
]}

Michalowski, M. J. ^{[18
]}

Oesch, P. ^{[14
]}

Scott, D. ^{[19
]}

Simpson, J. M. ^{[20
]}

Smolcic, V. ^{[21
]}

Stach, S. M. ^{[2
]}

Thomson, A. P. ^{[22
]}

Toft, S. ^{[23
]}

Vardoulaki, E. ^{[25
]}

Wardlow, J. L. ^{[24
]}

Weiss, A. ^{[25
]}

van der Werf, P. ^{[15
]}

机构：

[1] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[2] Univ Durham, Dept Phys, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, England

[3] Univ Nottingham, Sch Phys & Astron, Univ Pk, Nottingham NG7 2RD, England

[4] Univ Western Cape, Dept Phys & Astron, Robert Sobukwe Rd, ZA-7535 Bellville, South Africa

[5] Univ Bonn, Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany

[6] Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England

[7] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

[8] European Southern Observ, Karl Schwarzschild Str 2, Garching, Germany

[9] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[10] Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England

[11] Univ Edinburgh, Royal Observ, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[12] Univ Hawaii, Dept Phys & Astron, 2505 Correa Rd, Honolulu, HI 96822 USA

[13] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[14] Univ Geneva, Dept Astron, Ch Maillettes 51, CH-1290 Versoix, Switzerland

[15] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[16] Univ Bonn, Int Max Planck Res Sch Astron & Astrophys, Bonn, Germany

[17] Univ Cologne, Int Max Planck Res Sch Astron & Astrophys, Bonn, Germany

[18] Adam Mickiewicz Univ, Fac Phys, Astron Observ Inst, Ul Sloneczna 36, PL-60286 Poznan, Poland

[19] Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada

[20] Acad Sinica, Inst Astron & Astrophys, 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan

[21] Univ Zagreb, Fac Sci, Bijenicka C 32, Zagreb 10002, Croatia

[22] Univ Manchester, Oxford Rd, Manchester M13 9PL, Lancs, England

[23] Univ Copenhagen, Niels Bohr Inst, Cosm Dawn Ctr DAWN, Lyngbyvej 2, DK-2100 Copenhagen, Denmark

[24] Univ Lancaster, Phys Dept, Lancaster LA1 4YB, England

[25] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 879卷 / 01期

基金：

新加坡国家研究基金会; 欧洲研究理事会;

关键词：

galaxies: high-redshift; galaxies: stellar content; galaxies: structure; DEEP FIELD-SOUTH; COSMOLOGY LEGACY SURVEY; STAR-FORMING GALAXIES; MOLECULAR GAS; ATLAS(3D) PROJECT; SIMPLE-MODEL; ALMA SURVEY; EVOLUTION; Z-SIMILAR-TO-2; RESOLUTION;

D O I：

10.3847/1538-4357/ab1f77

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We combine high-resolution ALMA and HST/CANDELS observations of 20 submillimeter galaxies (SMGs), predominantly from the AS2UDS survey at z similar or equal to 2, with bright rest-frame optical counterparts (K-s less than or similar to 22.9) to investigate the resolved structural properties of their dust and stellar components. We derive two-dimensional stellar-mass distributions that are inferred from spatial mass-to-light ratio (M/L*) corrections based on rest-frame optical colors. Due to the high central column densities of dust in our SMGs, our mass distributions likely represent a lower limit to the true central mass density. The centroid positions between the inferred stellar-mass and the dust distributions agree within 1.1 kpc, indicating an overall good spatial agreement between the two components. The majority of our sources exhibit compact dust configurations relative to the stellar component (with a median ratio of effective radii R-e,R-dust/R-e,(*) = 0.6). This ratio does not change with specific star formation rate over the factor of 30 spanned by our targets, sampling the locus of "normal" main-sequence galaxies up to the starburst regime, log(sSFR/sSFR(Ms)) >= 0.5. Unlike typical spiral galaxies in the local universe, our results imply that massive SMGs are experiencing centrally enhanced star formation. The sizes and stellar densities of our SMGs are in agreement with those of the passive population at z = 1.5, which is consistent with these systems being the descendants of z similar or equal to 2 SMGs.

引用

页数：22

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