Probing the X-ray Spectra of Alpha Coronae Borealis

TL;DR

This paper analyzes X-ray spectra and timing data of Alpha Coronae Borealis, revealing elemental abundances, emission lines, and active regions on the star's surface through spectral modeling and light curve analysis.

Contribution

It provides detailed spectral and timing analysis of Alpha Coronae Borealis, including elemental abundances and active region mapping, which is novel for this system.

Findings

Elemental abundances of O, Mg, Si, and Fe determined

Detection of a 1.3 keV emission line

Identification of an active region near the G star's limb

Abstract

We present a detailed spectral and timing analysis of X-ray observations of the brightest eclipsing systems Alpha Coronae Borealis taken by XMM-Newton. We got from the thermal plasma model metal the abundances of some elements (O, Mg, Si, and Fe) and an emission line at 1.3 Kev from the simple Gaussian line profile. From the light curves, there is a strong active region at the lower left in the maps, near the limb of the G component, and increasing in some parts which means a band diagonally running across the G star disk from lower left to upper right, close to the projected center.