Reproducing the kinematics of damped Lyman α systems
© 2015 The Authors. We examine the kinematic structure of damped Lyman α systems (DLAs) in a series of cosmological hydrodynamic simulations using the AREPO code. We are able to match the distribution of velocity widths of associated low-ionizationmetal absorbers substantially better than earlier wo...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Oxford University Press (OUP)
2021
|
| Online Access: | https://hdl.handle.net/1721.1/134453 |
| _version_ | 1826191275542446080 |
|---|---|
| author | Bird, Simeon Haehnelt, Martin Neeleman, Marcel Genel, Shy Vogelsberger, Mark Hernquist, Lars |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Bird, Simeon Haehnelt, Martin Neeleman, Marcel Genel, Shy Vogelsberger, Mark Hernquist, Lars |
| author_sort | Bird, Simeon |
| collection | MIT |
| description | © 2015 The Authors. We examine the kinematic structure of damped Lyman α systems (DLAs) in a series of cosmological hydrodynamic simulations using the AREPO code. We are able to match the distribution of velocity widths of associated low-ionizationmetal absorbers substantially better than earlier work. Our simulations produce a population of DLAs dominated by haloes with virial velocities around 70 km s-1, consistent with a picture of relatively small, faint objects. In addition, we reproduce the observed correlation between velocity width and metallicity and the equivalent width distribution of Si II. Some discrepancies of moderate statistical significance remain; too many of our spectra show absorption concentrated at the edge of the profile and there are slight differences in the exact shape of the velocity width distribution. We show that the improvement over previous work is mostly due to our strong feedback from star formation and our detailed modelling of the metal ionization state. |
| first_indexed | 2024-09-23T08:53:21Z |
| format | Article |
| id | mit-1721.1/134453 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:53:21Z |
| publishDate | 2021 |
| publisher | Oxford University Press (OUP) |
| record_format | dspace |
| spelling | mit-1721.1/1344532023-09-26T19:54:49Z Reproducing the kinematics of damped Lyman α systems Bird, Simeon Haehnelt, Martin Neeleman, Marcel Genel, Shy Vogelsberger, Mark Hernquist, Lars Massachusetts Institute of Technology. Department of Physics © 2015 The Authors. We examine the kinematic structure of damped Lyman α systems (DLAs) in a series of cosmological hydrodynamic simulations using the AREPO code. We are able to match the distribution of velocity widths of associated low-ionizationmetal absorbers substantially better than earlier work. Our simulations produce a population of DLAs dominated by haloes with virial velocities around 70 km s-1, consistent with a picture of relatively small, faint objects. In addition, we reproduce the observed correlation between velocity width and metallicity and the equivalent width distribution of Si II. Some discrepancies of moderate statistical significance remain; too many of our spectra show absorption concentrated at the edge of the profile and there are slight differences in the exact shape of the velocity width distribution. We show that the improvement over previous work is mostly due to our strong feedback from star formation and our detailed modelling of the metal ionization state. 2021-10-27T20:05:04Z 2021-10-27T20:05:04Z 2015 2019-06-18T11:42:26Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134453 en 10.1093/MNRAS/STU2542 Monthly Notices of the Royal Astronomical Society Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Oxford University Press (OUP) arXiv |
| spellingShingle | Bird, Simeon Haehnelt, Martin Neeleman, Marcel Genel, Shy Vogelsberger, Mark Hernquist, Lars Reproducing the kinematics of damped Lyman α systems |
| title | Reproducing the kinematics of damped Lyman α systems |
| title_full | Reproducing the kinematics of damped Lyman α systems |
| title_fullStr | Reproducing the kinematics of damped Lyman α systems |
| title_full_unstemmed | Reproducing the kinematics of damped Lyman α systems |
| title_short | Reproducing the kinematics of damped Lyman α systems |
| title_sort | reproducing the kinematics of damped lyman α systems |
| url | https://hdl.handle.net/1721.1/134453 |
| work_keys_str_mv | AT birdsimeon reproducingthekinematicsofdampedlymanasystems AT haehneltmartin reproducingthekinematicsofdampedlymanasystems AT neelemanmarcel reproducingthekinematicsofdampedlymanasystems AT genelshy reproducingthekinematicsofdampedlymanasystems AT vogelsbergermark reproducingthekinematicsofdampedlymanasystems AT hernquistlars reproducingthekinematicsofdampedlymanasystems |