Search Publications

The 6.7 keV thermal emission lines in the stellar flare spectra of two chromospherically active Binaries: Algol and GT Mus

Eze, Ambrose Chukwudi; Esaenwi, Sudum; Madu, Fidelis Okey

Chromospherically active binaries' (CABs) are late-type evolved stars with strong chromosphere/coronae and high flare activity levels. Starspot evolution in these CABs and binaries reveals strong stellar and chromospheric activities. In binaries, the tidal interaction via the internal dynamo motion, during rapid rotation of the component stars gen…

A search for thermal X-ray emission from the composite supernova remnant G21.5-0.9 with Suzaku

Raycheva, Nergis C.; Sezer, Aytap

G21.5-0.9 is a young plerionic composite supernova remnant (SNR) hosting a bright pulsar wind nebula. The previous X-ray studies reported that the X-ray spectrum of the entire SNR can be fitted with a non-thermal spectral model, while the recent Chandra studies have pointed out that its X-ray spectrum also shows weak thermal emission. With this mo…

X-ray investigation of the X-ray source 1RXS J121902.7-630910 with Suzaku

Bakis, Hicran; Raycheva, Nergis C.; Sezer, Aytap +1 more

We present a study of the unidentified X-ray source 1RXS J121902.7-630910 based on Suzaku X-ray Imaging Spectrometer observation. We aim at clarifying the nature of the emission from 1RXS J121902.7-630910. We found that the spectrum is well represented by a thermal plasma model with an electron temperature of kT_e ∼ 3.7 keV, the upper li…