New data for the LBV in NGC 4736

TL;DR

This paper provides new spectral and photometric observations of a luminous blue variable in NGC 4736, revealing variability and estimating its initial mass, contributing valuable data to LBV studies.

Contribution

It presents new observational data and analysis of an LBV in NGC 4736, including spectral variability and mass estimation, which were previously unreported.

Findings

Spectral variability observed from 2015 to 2018.

Significant brightness changes correlated with spectral variability.

Estimated initial mass of approximately 130 solar masses.

Abstract

We present new spectral and photometric data of confirmed LBV star from the NGC4736 galaxy. The star NGC4736_1 (Mbol = -11.5 mag) showed noticeable spectral variability from 2015 to 2018, which was accompanied by a significant change in the brightness. We also have estimated possible initial mass of the object NGC4736_1 as ~130 Msun.