Discovery of metal-poor and distant pre-main sequence candidates in WLM with JWST
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866916588653903872 |
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| author | Kalari, Venu M. Salinas, Ricardo Andersen, Morten De Marchi, Guido Rubio, Monica Vink, Jorick S. Zinnecker, Hans |
| author_facet | Kalari, Venu M. Salinas, Ricardo Andersen, Morten De Marchi, Guido Rubio, Monica Vink, Jorick S. Zinnecker, Hans |
| contents | We present the discovery of twelve metal-poor and distant pre-main sequence (PMS) candidates in the dwarf irregular galaxy Wolf-Lundmark-Melotte (WLM)~968 kpc away, at a present-day metallicity of [Fe/H] around $-$0.9. These candidates have masses between 1.25-5 M$_{\odot}$, with ages <10 Myr, and exhibit significant near-infrared excesses at 2.5 and 4.3 $μ$m. They are concentrated within a cluster roughly 10 pc (2'') across situated in the HII region [HM95]-9. These are the most distant and metal-poor PMS stars known, and can offer new quantitative insights into star formation at low-metallicities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_17097 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Discovery of metal-poor and distant pre-main sequence candidates in WLM with JWST Kalari, Venu M. Salinas, Ricardo Andersen, Morten De Marchi, Guido Rubio, Monica Vink, Jorick S. Zinnecker, Hans Solar and Stellar Astrophysics Astrophysics of Galaxies We present the discovery of twelve metal-poor and distant pre-main sequence (PMS) candidates in the dwarf irregular galaxy Wolf-Lundmark-Melotte (WLM)~968 kpc away, at a present-day metallicity of [Fe/H] around $-$0.9. These candidates have masses between 1.25-5 M$_{\odot}$, with ages <10 Myr, and exhibit significant near-infrared excesses at 2.5 and 4.3 $μ$m. They are concentrated within a cluster roughly 10 pc (2'') across situated in the HII region [HM95]-9. These are the most distant and metal-poor PMS stars known, and can offer new quantitative insights into star formation at low-metallicities. |
| title | Discovery of metal-poor and distant pre-main sequence candidates in WLM with JWST |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2501.17097 |