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http://hdl.handle.net/20.500.12386/29675
Title: | ALMA [C II] 158 μm Detection of a Redshift 7 Lensed Galaxy behind RXJ1347.1-1145 | Authors: | Bradač, Maruša Garcia-Appadoo, Diego Huang, Kuang-Han VALLINI, Livia Quinn Finney, Emily Hoag, Austin Lemaux, Brian C. Borello Schmidt, Kasper Treu, Tommaso Carilli, Chris Dijkstra, Mark Ferrara, Andrea FONTANA, Adriano Jones, Tucker Ryan, Russell Wagg, Jeff Gonzalez, Anthony H. |
Issue Date: | 2017 | Journal: | THE ASTROPHYSICAL JOURNAL LETTERS | Number: | 836 | Issue: | 1 | First Page: | L2 | Abstract: | We present the results of ALMA spectroscopic follow-up of a z = 6.766 Lyα emitting galaxy behind the cluster RX J1347.1-1145. We report the detection of [C II] 158 μm line fully consistent with the Lyα redshift and with the peak of the optical emission. Given the magnification of μ = 5.0 ± 0.3, the intrinsic (corrected for lensing) luminosity of the [C II] line is L <SUB>[C II]</SUB> = {1.4}<SUB>-0.3</SUB><SUP>+0.2</SUP>× {10}<SUP>7</SUP> {L}<SUB>☉ </SUB>, roughly ∼5 times fainter than other detections of z ∼ 7 galaxies. The result indicates that low L <SUB>[C II]</SUB> in z ∼ 7 galaxies compared to the local counterparts might be caused by their low metallicities and/or feedback. The small velocity offset ({{∆ }}v={20}<SUB>-40</SUB><SUP>+140</SUP> {km} {{{s}}}<SUP>-1</SUP>) between the Lyα and [C II] line is unusual, and may be indicative of ionizing photons escaping. <P />These observations are based on the following ALMA data: ADS/JAO.ALMA#2015.1.00091.S. They are also associated with programs Spitzer #90009, 60034, 00083, 50610, 03550, 40593, and HST # GO10492, GO11591, GO12104, and GO13459. Furthermore based on multi-year KECK programs. | URI: | http://hdl.handle.net/20.500.12386/29675 | URL: | https://iopscience.iop.org/article/10.3847/2041-8213/836/1/L2 | ISSN: | 2041-8205 | DOI: | 10.3847/2041-8213/836/1/L2 | Bibcode ADS: | 2017ApJ...836L...2B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Bradac2017.pdf | Pdf editoriale | 1.25 MB | Adobe PDF | View/Open |
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