Accretion flow properties of MAXI J1910-057/Swift J1910.2–0546 during its 2012–13 outburst

The black hole candidate MAXI J 1659 - 152 : spectral and timing analysis during its 2010 outburst

We present a comprehensive spectral-timing study of the black hole candidate MAXI J1659152 during its 2010 outburst. We analysed 65 RXTE observations taken along this period and computed the fundamental diagrams commonly used to study black hole transients. We fitted power density and energy spectra and studied the evolution of the spectral and timing parameters along the outburst. We discuss t...

The study of Hydrodynamical wind on the observational properties of magnetized accretion flow with thermal conduction

Accretion flow behaviour during the evolution of the Quasi Periodic Oscillation Frequency of XTE J1550-564 in 1998 outburst

Low and Intermediate Frequency Quasi-Periodic Oscillations (QPOs) are thought to be due to oscillations of Comptonizing regions or hot regions embedded in Keplerian discs. Observational evidence of evolutions of QPOs would therefore be very important as they throw lights on the dynamics of the hotter region. Our aim is to find systems in which there is a well defined correlation among the frequ...

Simulations of spiral structure in the accretion disc of IP Pegasi during outburst

We consider the implications of the detection of spiral structure in the accretion disc of the binary IP Pegasi. We use numerical simulations of the development of a disc outburst to construct predicted Doppler tomograms, which are found to be in close agreement with the observations if the spiral pattern arises as a transient feature when the disc expands viscously at the start of the outburst...

Swift observations of V404 Cyg during the 2015 outburst: X-ray outflows from super-Eddington accretion

The black-hole binary V404 Cyg entered the outburst phase in June 2015 after 26 years of X-ray quiescence, and with its behaviour broke the outburst evolution pattern typical of most black-hole binaries. We observed the entire outburst with the Swift satellite and performed time-resolved spectroscopy of its most active phase, obtaining over a thousand spectra with exposures from tens to hundred...