DDO spectroscopic survey of MOST variable stars

TL;DR

This study provides spectroscopic data for 103 MOST-observed variable stars, discovering new binaries and verifying variability types, thereby enhancing understanding of stellar variability through medium-resolution spectra analysis.

Contribution

It offers the first spectroscopic survey of MOST variable stars, identifying new binaries and refining variability classifications based on spectral data.

Findings

Discovered 7 new spectroscopic binaries.

Provided orbital solutions for two binaries.

Confirmed or modified variability types for 83 stars.

Abstract

A spectroscopic support survey of 103 objects observed by the MOST satellite is presented; 96 are variable stars with 83 of them being new MOST variable-star detections or stars with variability types verified and/or modified on the basis of the MOST data. Analysis of 241 medium-resolution spectra using the broadening-functions formalism yielded radial velocities, projected rotational velocities (for 31 targets for which it was possible) and spectral type estimates. Seven new spectroscopic binaries were discovered; orbital solutions are given for two of them (HD73709, and GSC 0814-0323). The visual binary HD46180 was found to be composed of two close binary stars (eclipsing and non-eclipsing one) very probably forming a physical quadruple system.