Spectroscopic Characterization of WD J000801.25-350450 and Its Two Comoving Companions

The Astronomical Journal 2026 Open access

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Authors: Peter A. Jałowiczor, Thomas P. Bickle, J. Davy Kirkpatrick, Sarah L. Casewell, Nicola Gentile Fusillo, Adam C. Schneider, Jonathan Gagné, Jacqueline K. Faherty, Aaron M. Meisner, Marc J. Kuchner, Adam J. Burgasser, Austin James Rothermich
+6 more A. Bravo, Michiharu Hyogo, Mark Popinchalk, Alex J. Brown, Alberto Rebassa-Mansergas, Raquel Murillo-Ojeda
DOI: 10.3847/1538-3881/ae38d3
Cited by: 1
References: 44

Abstract

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 T eff = 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.

Fields of Study & Subjects

Stellar planetary and galactic studies Astronomy and Astrophysical Research Astrophysics and Star Formation Studies

Publication details

Journal / source
The Astronomical Journal
Publisher
American Astronomical Society
Volume
171
Issue
3
Pages
171–171
Publication date
18 February 2026
Language
EN