The short-period low-mass binary system CC Com revisited

TL;DR

This paper provides a detailed analysis of the orbital and physical parameters of the short-period low-mass contact binary CC Com, using new CCD and archival spectroscopic data, and discusses its evolutionary status.

Contribution

The study offers the first precise measurements of CC Com's physical parameters and estimates its distance and mass transfer rate, enhancing understanding of such binary systems.

Findings

Component masses: 0.717 and 0.378 solar masses

Distance estimated at 64 parsecs

Mass transfer rate of 1.6×10^{-8} solar masses per year

Abstract

In this study we determined precise orbital and physical parameters of the very short period low-mass contact binary system CC Com. The parameters are obtained by analysis of the new CCD data with the archival spectroscopic data. The physical parameters of the components derived as $M_\textrm{c}$ = 0.717(14) $M_{\odot}$, $M_\textrm{h}$ = 0.378(8) $M_{\odot}$, $R_\textrm{c}$ = 0.708(12) $R_{\odot}$, $R_\textrm{h}$ = 0.530(10) $R_{\odot}$, $L_\textrm{c}$ = 0.138(12) $L_{\odot}$, $L_\textrm{h}$ = 0.085(7) $L_{\odot}$, and the distance of the system is estimated as 64(4) pc. The times of minima obtained in this study and with those published before enable us to calculate the mass transfer rate between the components which is $1.6\times10^{-8}$ M$_{\odot}$yr$^{-1}$. Finally, we discuss the possible evolutionary scenario of CC Com.