Searching for Contact Binaries with LAMOST and TESS

In this work, we search for CBs with high-precision light curves from the Transiting Exoplanet Survey Satellite and large radial-velocity variation from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope. We derive a sample of 1281 CB candidates, among which 266 are newly reported.

Our sample with both high-precision photometry and medium-resolution spectra may provide new constraints on the physical scales, luminosity calibration, and population distribution of CBs, offering valuable insights into their evolutionary role within the stellar population.