ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We contrast predictions for the high-redshift galaxy population and reionization history between cold dark matter (CDM) and an alternative self-interacting dark matter model based on the recently d...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Oxford University Press (OUP)
2021
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| Online Access: | https://hdl.handle.net/1721.1/132527 |
| _version_ | 1826188516463214592 |
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| author | Lovell, Mark R Zavala, Jesús Vogelsberger, Mark Shen, Xuejian Cyr-Racine, Francis-Yan Pfrommer, Christoph Sigurdson, Kris Boylan-Kolchin, Michael Pillepich, Annalisa |
| author_facet | Lovell, Mark R Zavala, Jesús Vogelsberger, Mark Shen, Xuejian Cyr-Racine, Francis-Yan Pfrommer, Christoph Sigurdson, Kris Boylan-Kolchin, Michael Pillepich, Annalisa |
| author_sort | Lovell, Mark R |
| collection | MIT |
| description | © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We contrast predictions for the high-redshift galaxy population and reionization history between cold dark matter (CDM) and an alternative self-interacting dark matter model based on the recently developed ETHOS framework that alleviates the small-scale CDM challenges within the Local Group.We perform the highest resolution hydrodynamical cosmological simulations (a 36 Mpc3 volume with gas cell mass of ~105M⊙ and minimum gas softening of ~180 pc) within ETHOS to date - plus a CDM counterpart - to quantify the abundance of galaxies at high redshift and their impact on reionization. We find that ETHOS predicts galaxies with higher ultraviolet (UV) luminosities than their CDM counterparts and a faster build-up of the faint end of the UV luminosity function. These effects, however, make the optical depth to reionization less sensitive to the power spectrum cut-off: the ETHOS model differs from the CDM τ value by only 10 per cent and is consistent with Planck limits if the effective escape fraction of UV photons is 0.1-0.5. We conclude that current observations of high-redshift luminosity functions cannot differentiate between ETHOS and CDM models, but deep James Webb Space Telescope surveys of strongly lensed, inherently faint galaxies have the potential to test non-CDM models that offer attractive solutions to CDM's Local Group problems. |
| first_indexed | 2024-09-23T08:00:51Z |
| format | Article |
| id | mit-1721.1/132527 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:00:51Z |
| publishDate | 2021 |
| publisher | Oxford University Press (OUP) |
| record_format | dspace |
| spelling | mit-1721.1/1325272021-09-21T04:09:03Z ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization Lovell, Mark R Zavala, Jesús Vogelsberger, Mark Shen, Xuejian Cyr-Racine, Francis-Yan Pfrommer, Christoph Sigurdson, Kris Boylan-Kolchin, Michael Pillepich, Annalisa © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We contrast predictions for the high-redshift galaxy population and reionization history between cold dark matter (CDM) and an alternative self-interacting dark matter model based on the recently developed ETHOS framework that alleviates the small-scale CDM challenges within the Local Group.We perform the highest resolution hydrodynamical cosmological simulations (a 36 Mpc3 volume with gas cell mass of ~105M⊙ and minimum gas softening of ~180 pc) within ETHOS to date - plus a CDM counterpart - to quantify the abundance of galaxies at high redshift and their impact on reionization. We find that ETHOS predicts galaxies with higher ultraviolet (UV) luminosities than their CDM counterparts and a faster build-up of the faint end of the UV luminosity function. These effects, however, make the optical depth to reionization less sensitive to the power spectrum cut-off: the ETHOS model differs from the CDM τ value by only 10 per cent and is consistent with Planck limits if the effective escape fraction of UV photons is 0.1-0.5. We conclude that current observations of high-redshift luminosity functions cannot differentiate between ETHOS and CDM models, but deep James Webb Space Telescope surveys of strongly lensed, inherently faint galaxies have the potential to test non-CDM models that offer attractive solutions to CDM's Local Group problems. 2021-09-20T18:22:51Z 2021-09-20T18:22:51Z 2020-11-12T14:48:31Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132527 en 10.1093/MNRAS/STY818 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 | Lovell, Mark R Zavala, Jesús Vogelsberger, Mark Shen, Xuejian Cyr-Racine, Francis-Yan Pfrommer, Christoph Sigurdson, Kris Boylan-Kolchin, Michael Pillepich, Annalisa ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization |
| title | ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization |
| title_full | ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization |
| title_fullStr | ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization |
| title_full_unstemmed | ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization |
| title_short | ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization |
| title_sort | ethos an effective theory of structure formation predictions for the high redshift universe abundance of galaxies and reionization |
| url | https://hdl.handle.net/1721.1/132527 |
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