New galaxy UV luminosity constraints on warm dark matter from JWST
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909207563862016 |
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| author | Liu, Bin Shan, Huanyuan Zhang, Jiajun |
| author_facet | Liu, Bin Shan, Huanyuan Zhang, Jiajun |
| contents | We exploit the recent {\it James Webb Space Telescope} (JWST) determination of galaxy UV luminosity functions over the redshift range $z=9-14.5$ to derive constraints on warm dark matter (WDM) models. The delayed structure formation in WDM universes make high-redshift observations a powerful probe to set limits on the particle mass $m_\mathrm{x}$ of WDM candidates. By integrating these observations with blank-field surveys conducted by the {\it Hubble Space Telescope} (HST) at redshifts $z=4-8$, we impose constraints on both astrophysical parameters ($β$, $γ$, $ε_{\mathrm N}$, $M_c$ for a double-power law star formation efficiency, and $σ_{M_{\mathrm{UV}}}$ for a Gaussian magnitude-halo mass relation) and the WDM parameter (dark matter particle mass $m_\mathrm{x}$) simultaneously. We find a new limit of $m_\mathrm{x} \geq 3.2$ keV for the mass of thermal relic WDM particles at $95\%$ confidence level. This bound is tighter than the most stringent result derived using HST data before. Future JWST observations could further reduce the observation uncertainties and improve this constraint. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_13596 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | New galaxy UV luminosity constraints on warm dark matter from JWST Liu, Bin Shan, Huanyuan Zhang, Jiajun Cosmology and Nongalactic Astrophysics We exploit the recent {\it James Webb Space Telescope} (JWST) determination of galaxy UV luminosity functions over the redshift range $z=9-14.5$ to derive constraints on warm dark matter (WDM) models. The delayed structure formation in WDM universes make high-redshift observations a powerful probe to set limits on the particle mass $m_\mathrm{x}$ of WDM candidates. By integrating these observations with blank-field surveys conducted by the {\it Hubble Space Telescope} (HST) at redshifts $z=4-8$, we impose constraints on both astrophysical parameters ($β$, $γ$, $ε_{\mathrm N}$, $M_c$ for a double-power law star formation efficiency, and $σ_{M_{\mathrm{UV}}}$ for a Gaussian magnitude-halo mass relation) and the WDM parameter (dark matter particle mass $m_\mathrm{x}$) simultaneously. We find a new limit of $m_\mathrm{x} \geq 3.2$ keV for the mass of thermal relic WDM particles at $95\%$ confidence level. This bound is tighter than the most stringent result derived using HST data before. Future JWST observations could further reduce the observation uncertainties and improve this constraint. |
| title | New galaxy UV luminosity constraints on warm dark matter from JWST |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2404.13596 |