Abstract Details

Name: M.P. Athulya Menon
Affiliation: Dayanand Sagar University
Conference ID: ASI2020_518
Title : X-ray class variabilities in Galactic Black Hole binaries
Authors and Co-Authors : M. P. Athulya Menon 1* , Radhika D. 1 , Samir Mandal 2 , Sachindra Naik 3 , Anuj Nandi 4 1 Department of Physics, Dayananda Sagar University, Bengaluru 2 Department of Earth and Space sciences, IIST, Thiruvananthapuram 3 Astronomy & Astrophysics Division, Physical Research Laboratory, Ahmedabad 4 Space Astronomy Group, U. R. Rao Satellite Centre, ISITE Campus, Bengaluru
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : Black hole binaries exhibit wide range of variabilities in X-ray emission which is reflected in the observed lightcurves and spectra. Some of these sources show several types of variabilities which occur in specific pattern in the X-ray lightcurves and Colour-Colour Diagram (CCD) and has been classified into different classes. GRS 1915+105 is a source well known blackhole candidate to exhibit 14 type of such class variabilities. Similar type of signatures have been also observed in another blackhole binary IGR J17091-3624. We have explored the presence of such variability signatures in a few more sources like GX 339-4 and XTE J1859+226. We found that such variabilities mostly occur in the intermediate spectral state of the sources. We highlight the 'possible' mechanism for these variabilities in the context of accretion dynamics around the blackhole sources.