A Massive White Dwarf or Low-mass Neutron Star Discovered by LAMOST

• Published in: The Astrophysical journal Vol. 977; no. 2; pp. 245 - 256
• Main Authors: Zhao, Xinlin, Wang, Song, Wang, Pengfei, Zheng, Chuanjie, Yuan, Haibo, Liu, Jifeng
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 01.12.2024; IOP Publishing
• Subjects: Binary stars; Curve fitting; Light curve; Neutron stars; Neutrons; Radial velocity; Radio signals; Stars; Supernova; White dwarf stars; X ray binaries; X ray stars; X-ray astronomy

We report the discovery of a close binary J0606+2132 (Gaia DR3 3423365496448406272) with P obs = 2.77 days containing a possible massive white dwarf (WD) or a neutron star (NS) using LAMOST spectroscopic data. By a joint fitting of the radial velocity from LAMOST and the light curve from TESS, we de...