2024/11/13 by Zhao, Xinlin, Wang, Song, Wang, Pengfei +3 · 1 citation
#FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Solar and Stellar Astrophysics (astro-ph.SR)
paper · doi:10.48550/arxiv.2411.08837
We report the discovery of a close binary J0606+2132 (Gaia DR3 3423365496448406272) with P\rm obs=2.77 days containing a possible massive white dwarf or a neutron star using the LAMOST spectroscopic data. By a joint fitting of the radial velocity from LAMOST and the light curve from TESS, we derived a circular Keplerian orbit with an inclination of i=81.31∘^+6.26∘-7.85∘, which is consistent with that derived from v\rm sinI. Together with the mass of the visible star, we derived the mass of the invisible object to be 1.34+0.35-0.40 M\odot. Spectral disentangling with the LAMOST medium-resolution spectra shows no absorption feature from an additional component, suggesting the presence of a compact object. No X-ray or radio pulsed signal is detected from ROSAT and FAST archive observations. J0606+2132 could evolve into either a Type Ia supernova or a neutron star through accretion-induced collapse if it is a white dwarf, or into an intermediate-mass X-ray binary if it is a neutron star.