We present new spectroscopic data for Gaia DR3 2309499817384726016 (WD 0008-350A) and its two wide, comoving, low-mass companions. We confirm the white dwarf is a hydrogen rich DA, with Teff = 6200 ± 90 K and a mass of 0.63 ± 0.03 M⊙, close to that of the average white dwarf. Near-infrared spectra of the two stellar companions to WD 0008-350A 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.
Spectroscopic Characterization of WD J000801.25-350450 and Its Two Comoving Companions / Jalowiczor, P.A., Bickle, T.P., Kirkpatrick, J.D., Casewell, S.L., Gentile Fusillo, N., Schneider, A.C., Gagne, J., Faherty, J.K., Meisner, A.M., Kuchner, M.J., Burgasser, A.J., Rothermich, A., Bravo, A., Hyogo, M., Popinchalk, M., Brown, A.J., Rebassa-Mansergas, A., Murillo-Ojeda, R.. - In: THE ASTRONOMICAL JOURNAL. - ISSN 0004-6256. - 171:3(2026), pp. 171.--171.-. [10.3847/1538-3881/ae38d3]
Spectroscopic Characterization of WD J000801.25-350450 and Its Two Comoving Companions
Gentile Fusillo N.;
2026-01-01
Abstract
We present new spectroscopic data for Gaia DR3 2309499817384726016 (WD 0008-350A) and its two wide, comoving, low-mass companions. We confirm the white dwarf is a hydrogen rich DA, with Teff = 6200 ± 90 K and a mass of 0.63 ± 0.03 M⊙, close to that of the average white dwarf. Near-infrared spectra of the two stellar companions to WD 0008-350A 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.Pubblicazioni consigliate
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