PREPRINT
F785BBE2-874C-4104-B2E3-57022B63F5DA

# Searching for compact objects with Gaia DR3

Jin-Bo Fu, Wei-Min Gu, Zhi-Xiang Zhang, Tuan Yi, Sen-Yu Qi, Ling-Lin Zheng, Jifeng Liu
arXiv:2207.05434

Submitted on 12 July 2022

## Abstract

We search for compact objects in binaries based on Gaia DR3. A sample of ten targets is derived under the conditions: low temperature (${T}_{\mathrm{e}\mathrm{f}\mathrm{f}}<6000$ K), high radial velocity variation ($\mathrm{\Delta }{V}_{\mathrm{r}}>200$ km s${}^{-1}$), high mass function ($f\left({M}_{2}\right)>1{M}_{\odot }$), and ellipsoidal-like light curves. Two targets have LAMOST spectroscopic observations, one of which is a double-lined spectroscopic binary. The observational data of seven targets are not self-consistent, since their photometric periods are even shorter than the theoretical minimum orbital periods calculated by the stellar parameters from Gaia DR3. According to the gathered data, two targets may contain compact objects and are worth follow-up observations. This work may serve as an example to demonstrate the feasibility of searching for compact objects in the massive Gaia data.

## Preprint

Comment: To be submitted

Subjects: Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Astrophysics of Galaxies