ALMA 1.3 mm Survey of Lensed Submillimeter Galaxies Selected by Herschel : Discovery of Spatially Extended SMGs and Implications
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Sun , F , Egami , E , Rawle , T D , Walth , G L , Smail , I , Dessauges-Zavadsky , M , Perez-Gonzalez , P G , Richard , J , Combes , F , Ebeling , H , Pello , R , van der Werf , P , Altieri , B , Boone , F , Cava , A , Chapman , S C , Clement , B , Finoguenov , A , Nakajima , K , Rujopakarn , W , Schaerer , D & Valtchanov , I 2021 , ' ALMA 1.3 mm Survey of Lensed Submillimeter Galaxies Selected by Herschel : Discovery of Spatially Extended SMGs and Implications ' , Astrophysical Journal , vol. 908 , no. 2 , 192 . https://doi.org/10.3847/1538-4357/abd6e4
| Title: | ALMA 1.3 mm Survey of Lensed Submillimeter Galaxies Selected by Herschel : Discovery of Spatially Extended SMGs and Implications |
| Author: | Sun, Fengwu; Egami, Eiichi; Rawle, Timothy D.; Walth, Gregory L.; Smail, Ian; Dessauges-Zavadsky, Miroslava; Perez-Gonzalez, Pablo G.; Richard, Johan; Combes, Francoise; Ebeling, Harald; Pello, Roser; van der Werf, Paul; Altieri, Bruno; Boone, Frederic; Cava, Antonio; Chapman, Scott C.; Clement, Benjamin; Finoguenov, Alexis; Nakajima, Kimihiko; Rujopakarn, Wiphu; Schaerer, Daniel; Valtchanov, Ivan |
| Contributor organization: | Department of Physics |
| Date: | 2021-02 |
| Language: | eng |
| Number of pages: | 27 |
| Belongs to series: | Astrophysical Journal |
| ISSN: | 0004-637X |
| DOI: | https://doi.org/10.3847/1538-4357/abd6e4 |
| URI: | http://hdl.handle.net/10138/340879 |
| Abstract: | We present an ALMA 1.3 mm (Band 6) continuum survey of lensed submillimeter galaxies (SMGs) at z = 1.0 to similar to 3.2 with an angular resolution of similar to 02. These galaxies were uncovered by the Herschel Lensing Survey and feature exceptionally bright far-infrared continuum emission (S-peak greater than or similar to 90 mJy) owing to their lensing magnification. We detect 29 sources in 20 fields of massive galaxy clusters with ALMA. Using both the Spitzer/IRAC (3.6/4.5 mu m) and ALMA data, we have successfully modeled the surface brightness profiles of 26 sources in the rest-frame near- and far-infrared. Similar to previous studies, we find the median dust-to-stellar continuum size ratio to be small (R-e,R-dust/R-e,R-star = 0.38 0.14) for the observed SMGs, indicating that star formation is centrally concentrated. This is, however, not the case for two spatially extended main-sequence SMGs with a low surface brightness at 1.3 mm (less than or similar to 0.1 mJy arcsec(-2)), in which the star formation is distributed over the entire galaxy (R-e,R-dust/R-e,R-star > 1). As a whole, our SMG sample shows a tight anticorrelation between (R-e,R-dust/R-e,R-star) and far-infrared surface brightness (sigma(IR)) over a factor of 1000 in sigma(IR). This indicates that SMGs with less vigorous star formation (i.e., lower sigma(IR)) lack central starburst and are likely to retain a broader spatial distribution of star formation over the whole galaxies (i.e., larger R-e,R-dust/R-e,R-star). The same trend can be reproduced with cosmological simulations as a result of central starburst and potentially subsequent "inside-out" quenching, which likely accounts for the emergence of compact quiescent galaxies at z similar to 2. |
| Subject: |
High-redshift galaxies
Starburst galaxies Infrared galaxies Galaxy evolution Submillimeter astronomy 115 Astronomy, Space science |
| Peer reviewed: | Yes |
| Usage restriction: | openAccess |
| Self-archived version: | acceptedVersion |
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