Determining parameters of ULXs with model grids of extended atmospheres
A. Kostenkov, A. Vinokurov, Y. Solovyeva
TL;DR
This paper develops model grids of extended atmospheres to analyze wind parameters of ULXs, estimating fundamental wind parameters and examining the impact of wind velocity laws on emission line equivalent widths.
Contribution
It introduces new model grids covering a range of temperatures for ULX atmospheres and applies them to estimate wind parameters from spectral data.
Findings
Estimated wind parameters for several ULXs.
Analyzed the influence of wind velocity law on emission lines.
Provided new tools for spectral analysis of ULXs.
Abstract
In current work we continued study of wind parameters of ultraluminous X-ray sources (ULXs) using model grids of extended atmospheres. We present sets of models with temperatures from 18000 up to 56000K as a line equivalent widths (EWs) and their ratios diagrams. The fundamental wind parameters for some spectrally studied ULXs were estimated using EW diagrams. Also, influence of the wind velocity law on the equivalent widths of observed emission lines was investigated. This study was funded by RFBR according to the research project 18-32-20214.
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