209 citations · 1.8k across the 60 of their papers we have counts for
60 papers
4D Grid-fitting of UV-optical spectra of massive stars. I. Numerical technique and its associated uncertainties
Blagovest V. Petrov, Svetozar A. Zhekov
The best way to check the validity of our theories (models) is by direct comparison with the experiment (observations). In this study, we address the numerical inaccuracies intrins…
Latest Evolution of the X-Ray Remnant of SN 1987A: Beyond the Inner Ring
Aravind P. Ravi, Sangwook Park, Svetozar A. Zhekov +5
Based on our Chandra imaging-spectroscopic observations, we present the latest evolution of the X-ray remnant of SN 1987A. Recent changes in the electron temperatures and volume em…
X-ray Observations of the Enigmatic Wolf-Rayet System Theta Mus: Two's Company But Three's a Crowd
Stephen L. Skinner, Svetozar A. Zhekov, Manuel Guedel +1
Theta Mus is a remarkable spectroscopic binary (SB) consisting of a carbon-type Wolf-Rayet star and OV companion (WC6+O6-7V) in a 19-day orbit. In addition an O-supergiant is visua…
Chandra revisits WR48a: testing colliding wind models in massive binaries
Svetozar A. Zhekov, Marc Gagne, Stephen L. Skinner
We present results of new Chandra High-Energy Transmission Grating (HETG) observations (2019 November - December) of the massive Wolf-Rayet (WR) binary WR 48a. Analysis of these hi…
Spectral Evolution of the X-Ray Remnant of SN 1987A: A High-Resolution HETG Study
Aravind P. Ravi, Sangwook Park, Svetozar A. Zhekov +4
Based on observations with the X-ray Observatory, we present the latest spectral evolution of the X-ray remnant of SN 1987A (SNR 1987A). We present a high-resolution spec…
Colliding stellar wind modelling of the X-ray emission from WR 140
Svetozar A. Zhekov
We modelled the Chandra and RXTE X-ray spectra of the massive binary WR 140 in the framework of the standard colliding stellar wind (CSW) picture. Models with partial electron heat…