Spectroscopic Characterization of WD J000801.25-350450 and its Two Co-Moving Companions
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2026
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| author | Jałowiczor, Peter A. Bickle, Thomas P. Kirkpatrick, J. Davy Casewell, Sarah L. Fusillo, Nicola Gentile Schneider, Adam C. Gagné, Jonathan Faherty, Jacqueline K. Meisner, Aaron M. Kuchner, Marc J. Burgasser, Adam J. Rothermich, Austin Bravo, Alexia Hyogo, Michiharu Popinchalk, Mark Brown, Alex J. Rebassa-Mansergas, Alberto Murillo-Ojeda, Raquel Worlds, The Backyard : Collaboration, Planet 9 |
| author_facet | Jałowiczor, Peter A. Bickle, Thomas P. Kirkpatrick, J. Davy Casewell, Sarah L. Fusillo, Nicola Gentile Schneider, Adam C. Gagné, Jonathan Faherty, Jacqueline K. Meisner, Aaron M. Kuchner, Marc J. Burgasser, Adam J. Rothermich, Austin Bravo, Alexia Hyogo, Michiharu Popinchalk, Mark Brown, Alex J. Rebassa-Mansergas, Alberto Murillo-Ojeda, Raquel Worlds, The Backyard : Collaboration, Planet 9 |
| contents | We present new spectroscopic data for Gaia DR3 2309499817384726016 (WD0008-350A) and its two wide, co-moving, low-mass companions. We confirm the white dwarf is a hydrogen-rich DA, with T$_{\rm eff}$=6200$\pm$90~K and a mass of 0.63$\pm$0.03~M${\odot}$, close to that of the average white dwarf.
Near-infrared spectra of the two stellar companions to WD0008-350A reveal that the inner companion is an M dwarf, exhibiting a spectral type of M8. Furthermore, the outer companion is identified as a possible M6 + M9 binary. This paper examines the evidence which suggests the system may be quadruple. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_09845 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spectroscopic Characterization of WD J000801.25-350450 and its Two Co-Moving Companions Jałowiczor, Peter A. Bickle, Thomas P. Kirkpatrick, J. Davy Casewell, Sarah L. Fusillo, Nicola Gentile Schneider, Adam C. Gagné, Jonathan Faherty, Jacqueline K. Meisner, Aaron M. Kuchner, Marc J. Burgasser, Adam J. Rothermich, Austin Bravo, Alexia Hyogo, Michiharu Popinchalk, Mark Brown, Alex J. Rebassa-Mansergas, Alberto Murillo-Ojeda, Raquel Worlds, The Backyard : Collaboration, Planet 9 Solar and Stellar Astrophysics We present new spectroscopic data for Gaia DR3 2309499817384726016 (WD0008-350A) and its two wide, co-moving, low-mass companions. We confirm the white dwarf is a hydrogen-rich DA, with T$_{\rm eff}$=6200$\pm$90~K and a mass of 0.63$\pm$0.03~M${\odot}$, close to that of the average white dwarf. Near-infrared spectra of the two stellar companions to WD0008-350A reveal that the inner companion is an M dwarf, exhibiting a spectral type of M8. Furthermore, the outer companion is identified as a possible M6 + M9 binary. This paper examines the evidence which suggests the system may be quadruple. |
| title | Spectroscopic Characterization of WD J000801.25-350450 and its Two Co-Moving Companions |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2604.09845 |