New spectroscopic findings identify a white dwarf's characteristics in a quadruple system, suggesting complexity in stellar formations.
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.
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Jałowiczor et al. (2026) studied this question.
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