Year: 2026
Type: article
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.
Source: The Astronomical Journal
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 Rothermich, Alexia Bravo, Michiharu Hyogo, Mark Popinchalk, Alex J. Brown, Alberto Rebassa-Mansergas, Raquel Murillo-Ojeda
Institutions: The Open University, California Institute of Technology, Infrared Processing and Analysis Center, University of Leicester, University of Trieste, Trieste Astronomical Observatory, United States Naval Observatory, U.S. Naval Observatory Flagstaff Station, Espace pour la vie, Université de Montréal, American Museum of Natural History, NSF NOIRLab, Goddard Space Flight Center, University of California San Diego, Universität Hamburg, Institut d'Estudis Espacials de Catalunya, Universitat Politècnica de Catalunya, Centro de Astrobiología
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Awards: G1968107083, Collaborative Research: Backyard Worlds - Characterizing Our Nearest Neighbors Through Citizen Science, G410571670, G451917667, G4641790177, Collaborative Research: Backyard Worlds - Characterizing Our Nearest Neighbors Through Citizen Science, G523076202, G5539308778, G5967599077, G6033112984, G7312380752, Collaborative Research: Backyard Worlds - Characterizing Our Nearest Neighbors Through Citizen Science
OpenAlex ID: W7130414941