Lang, Philipp, Schinnerer, E., Smail, Ian ORCID: 0000-0003-3037-257X, Dudzeviciute, U., Swinbank, A. M., Liu, Daizhong ORCID: 0000-0001-9773-7479, Leslie, S. K., Almaini, O., An, Fang Xia, Bertoldi, F., Blain, A. W., Chapman, S. C., Chen, Chian-Chou, Conselice, C., Cooke, E. A., Coppin, K. E. K., Dunlop, J. S., Farrah, D., Fudamoto, Y., Geach, J. E., Gullberg, B., Harrington, K. C., Hodge, J. A., Ivison, R. J., Jimenez-Andrade, E. F., Magnelli, B., Michalowski, M. J., Oesch, P., Scott, D., Simpson, J. M., Smolcic, V., Stach, S. M., Thomson, A. P., Toft, S., Vardoulaki, E., Wardlow, J. L., Weiss, A. and van der Werf, P. (2019). Revealing the Stellar Mass and Dust Distributions of Submillimeter Galaxies at Redshift 2. Astrophys. J., 879 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Lang, PhilippUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schinnerer, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smail, IanUNSPECIFIEDorcid.org/0000-0003-3037-257XUNSPECIFIED
Dudzeviciute, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Swinbank, A. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, DaizhongUNSPECIFIEDorcid.org/0000-0001-9773-7479UNSPECIFIED
Leslie, S. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Almaini, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
An, Fang XiaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bertoldi, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blain, A. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chapman, S. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chen, Chian-ChouUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Conselice, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cooke, E. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coppin, K. E. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dunlop, J. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Farrah, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fudamoto, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Geach, J. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gullberg, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Harrington, K. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hodge, J. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ivison, R. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jimenez-Andrade, E. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Magnelli, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Michalowski, M. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Oesch, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scott, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simpson, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smolcic, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stach, S. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thomson, A. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Toft, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vardoulaki, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wardlow, J. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Weiss, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Werf, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-136498
DOI: 10.3847/1538-4357/ab1f77
Journal or Publication Title: Astrophys. J.
Volume: 879
Number: 1
Date: 2019
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-4357
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
DEEP FIELD-SOUTH; COSMOLOGY LEGACY SURVEY; STAR-FORMING GALAXIES; MOLECULAR GAS; ATLAS(3D) PROJECT; SIMPLE-MODEL; ALMA SURVEY; EVOLUTION; Z-SIMILAR-TO-2; RESOLUTIONMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/13649

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