For optical flickering in symbiotic star MWC 560

TL;DR

This paper reports on observational studies of MWC 560 over two seasons, focusing on brightness variability and spectral similarities, confirming the absence of flickering and suggesting stellar component similarities with XX Oph.

Contribution

It provides new observational data on MWC 560's brightness and spectral characteristics, and proposes a stellar configuration based on spectral comparison.

Findings

Confirmed absence of flickering in MWC 560 during 2020/2022

Identified spectral similarities between MWC 560 and XX Oph

Suggested a binary system with a red giant and white dwarf in MWC 560

Abstract

This study is based on observations of MWC560 during the last two observational seasons (2020/2021 and 2021/2022). Other than looking for flickering we were interested in following the variability of brightness in the same period. Looking for similarities in the spectra with other types of stars is also of great interest to us because it could help clarify the stellar configuration of such objects. Our observations during the last two observational seasons of MWC560 confirm the absence of flickering. From the similarities of the gathered spectra of XX Oph and MWC560 we assume that the components in XX Oph are a red giant and a white dwarf, which are also surrounded by a common shell.