Discovery of the richest pulsating ultra-massive white dwarf
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
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2025
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| _version_ | 1866915117999849472 |
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| author | De Geronimo, Francisco C. Uzundag, Murat Rebassa-Mansergas, Alberto Brown, Alex Kilic, Mukremin Corsico, Alejandro H. Jewett, Gracyn C. Moss, Adam G. |
| author_facet | De Geronimo, Francisco C. Uzundag, Murat Rebassa-Mansergas, Alberto Brown, Alex Kilic, Mukremin Corsico, Alejandro H. Jewett, Gracyn C. Moss, Adam G. |
| contents | The discovery of pulsations in ultra-massive white dwarfs can help to probe their interiors and unveil their core composition and crystallized mass fraction through asteroseismic techniques. To date, the richest pulsating ultra-massive white dwarf known is BPM 37093 with 8 modes detected, for which detailed asteroseismic analysis has been performed in the past. In this work, we report the discovery of 19 pulsation modes in the ultra-massive white dwarf star WD~J0135+5722, making it the richest pulsating hydrogen-atmosphere ultramassive white dwarf known to date. %In this work, we report the discovery of pulsations in WD~J0135+5722, a hydrogen-rich ultra-massive white dwarf observed with the Gran Telescopio Canarias. This object exhibits multi-periodic luminosity variations with periods ranging from 137 to 1345 s, typical of pulsating white dwarfs in the ZZ Ceti instability strip, which is centered at $T_{\rm eff} \sim 12\,000$ K. We estimate the stellar mass of WD J0135+5722 by different methods, resulting in $M_{\star} \sim 1.12-1.14 M_{\odot}$ if the star's core is made of oxygen and neon, or $M_{\star} \sim 1.14-1.15 M_{\odot}$ if the star hosts a carbon oxygen core. Future analysis of the star periods could shed light on the core chemical composition through asteroseismology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_13661 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Discovery of the richest pulsating ultra-massive white dwarf De Geronimo, Francisco C. Uzundag, Murat Rebassa-Mansergas, Alberto Brown, Alex Kilic, Mukremin Corsico, Alejandro H. Jewett, Gracyn C. Moss, Adam G. Solar and Stellar Astrophysics The discovery of pulsations in ultra-massive white dwarfs can help to probe their interiors and unveil their core composition and crystallized mass fraction through asteroseismic techniques. To date, the richest pulsating ultra-massive white dwarf known is BPM 37093 with 8 modes detected, for which detailed asteroseismic analysis has been performed in the past. In this work, we report the discovery of 19 pulsation modes in the ultra-massive white dwarf star WD~J0135+5722, making it the richest pulsating hydrogen-atmosphere ultramassive white dwarf known to date. %In this work, we report the discovery of pulsations in WD~J0135+5722, a hydrogen-rich ultra-massive white dwarf observed with the Gran Telescopio Canarias. This object exhibits multi-periodic luminosity variations with periods ranging from 137 to 1345 s, typical of pulsating white dwarfs in the ZZ Ceti instability strip, which is centered at $T_{\rm eff} \sim 12\,000$ K. We estimate the stellar mass of WD J0135+5722 by different methods, resulting in $M_{\star} \sim 1.12-1.14 M_{\odot}$ if the star's core is made of oxygen and neon, or $M_{\star} \sim 1.14-1.15 M_{\odot}$ if the star hosts a carbon oxygen core. Future analysis of the star periods could shed light on the core chemical composition through asteroseismology. |
| title | Discovery of the richest pulsating ultra-massive white dwarf |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2501.13661 |