The first symbiotic stars from the LAMOST survey

TL;DR

This paper reports the discovery of the first symbiotic stars identified from the LAMOST survey, significantly increasing the known population and demonstrating the survey's potential for finding such binaries.

Contribution

It presents the first identification of symbiotic stars from LAMOST data, including two new discoveries, expanding the known sample of these systems.

Findings

Discovered 4 symbiotic star candidates in LAMOST data

Identified 2 new symbiotic stars, including one S-type and one D-type

Demonstrated LAMOST's effectiveness in finding symbiotic binaries

Abstract

Symbiotic stars are interacting binary systems with the longest orbital periods. They are typically formed by a white dwarf, a red giant and a nebula. These objects are natural astrophysical laboratories for studying the evolution of binaries. Current estimates of the population of Milky Way symbiotic stars vary from 3000 up to 400000. However, the current census is less than 300. The Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) survey can obtain hundreds of thousands of stellar spectra per year, providing a good opportunity to search for new symbiotic stars. In this work we detect 4 of such binaries among 4,147,802 spectra released by the LAMOST, of which two are new identifications. The first is LAMOST J12280490-014825.7, considered to be an S-type halo symbiotic star. The second is LAMOST J202629.80+423652.0, a D-type symbiotic star.