A Metal-poor Damped Ly α System at Redshift 6.4
© 2019. The American Astronomical Society. All rights reserved. We identify a strong Lyα damping wing profile in the spectrum of the quasar P183+05 at z = 6.4386. Given the detection of several narrow metal absorption lines at z = 6.40392, the most likely explanation for the absorption profile is th...
| Main Authors: | , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Astronomical Society
2022
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| Online Access: | https://hdl.handle.net/1721.1/132356.2 |
| _version_ | 1811074884185358336 |
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| author | Bañados, Eduardo Rauch, Michael Decarli, Roberto Farina, Emanuele P Hennawi, Joseph F Mazzucchelli, Chiara Venemans, Bram P Walter, Fabian Simcoe, Robert A. Prochaska, J Xavier Cooper, Thomas Davies, Frederick B Chen, Shi-Fan S. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Bañados, Eduardo Rauch, Michael Decarli, Roberto Farina, Emanuele P Hennawi, Joseph F Mazzucchelli, Chiara Venemans, Bram P Walter, Fabian Simcoe, Robert A. Prochaska, J Xavier Cooper, Thomas Davies, Frederick B Chen, Shi-Fan S. |
| author_sort | Bañados, Eduardo |
| collection | MIT |
| description | © 2019. The American Astronomical Society. All rights reserved. We identify a strong Lyα damping wing profile in the spectrum of the quasar P183+05 at z = 6.4386. Given the detection of several narrow metal absorption lines at z = 6.40392, the most likely explanation for the absorption profile is that it is due to a damped Lyα system. However, in order to match the data a contribution of an intergalactic medium 5%-38% neutral or additional weaker absorbers near the quasar is also required. The absorption system presented here is the most distant damped Lyα system currently known. We estimate an H i column density of 1020.68±0.25 cm-2, metallicity [O/H] = -2.92 ± 0.32, and relative chemical abundances of a system consistent with a low-mass galaxy during the first Gyr of the universe. This object is among the most metal-poor damped Lyα systems known and, even though it is observed only ∼850 Myr after the big bang, its relative abundances do not show signatures of chemical enrichment by Population III stars. |
| first_indexed | 2024-09-23T09:56:32Z |
| format | Article |
| id | mit-1721.1/132356.2 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:56:32Z |
| publishDate | 2022 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/132356.22022-07-22T17:05:21Z A Metal-poor Damped Ly α System at Redshift 6.4 Bañados, Eduardo Rauch, Michael Decarli, Roberto Farina, Emanuele P Hennawi, Joseph F Mazzucchelli, Chiara Venemans, Bram P Walter, Fabian Simcoe, Robert A. Prochaska, J Xavier Cooper, Thomas Davies, Frederick B Chen, Shi-Fan S. MIT Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology. Department of Physics © 2019. The American Astronomical Society. All rights reserved. We identify a strong Lyα damping wing profile in the spectrum of the quasar P183+05 at z = 6.4386. Given the detection of several narrow metal absorption lines at z = 6.40392, the most likely explanation for the absorption profile is that it is due to a damped Lyα system. However, in order to match the data a contribution of an intergalactic medium 5%-38% neutral or additional weaker absorbers near the quasar is also required. The absorption system presented here is the most distant damped Lyα system currently known. We estimate an H i column density of 1020.68±0.25 cm-2, metallicity [O/H] = -2.92 ± 0.32, and relative chemical abundances of a system consistent with a low-mass galaxy during the first Gyr of the universe. This object is among the most metal-poor damped Lyα systems known and, even though it is observed only ∼850 Myr after the big bang, its relative abundances do not show signatures of chemical enrichment by Population III stars. 2022-07-22T17:05:20Z 2021-09-20T18:22:00Z 2022-07-22T17:05:20Z 2019 2020-11-09T14:32:37Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132356.2 en 10.3847/1538-4357/AB4129 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/octet-stream American Astronomical Society The American Astronomical Society |
| spellingShingle | Bañados, Eduardo Rauch, Michael Decarli, Roberto Farina, Emanuele P Hennawi, Joseph F Mazzucchelli, Chiara Venemans, Bram P Walter, Fabian Simcoe, Robert A. Prochaska, J Xavier Cooper, Thomas Davies, Frederick B Chen, Shi-Fan S. A Metal-poor Damped Ly α System at Redshift 6.4 |
| title | A Metal-poor Damped Ly α System at Redshift 6.4 |
| title_full | A Metal-poor Damped Ly α System at Redshift 6.4 |
| title_fullStr | A Metal-poor Damped Ly α System at Redshift 6.4 |
| title_full_unstemmed | A Metal-poor Damped Ly α System at Redshift 6.4 |
| title_short | A Metal-poor Damped Ly α System at Redshift 6.4 |
| title_sort | metal poor damped ly α system at redshift 6 4 |
| url | https://hdl.handle.net/1721.1/132356.2 |
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