Abstract Details
| Name: MAYUKH PAHARI Affiliation: IUCAA Conference ID: ASI2015_517 Title : Correlated study among time lag, energy and rms spectral properties across superluminal Radio jets in Black hole X-ray binaries Authors and Co-Authors : Ranjeev Misra IUCAA Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : Superluminal Radio jets have been observed many times from Galactic black hole X-ray binaries (BHXBs) during near-Eddington regime of outbursts. They are usually associated with state transition from hard intermediate to soft intermediate state. A systematic study of the evolution of frequency and energy dependent time lag, fractional rms and time-averaged energy spectra during outbursts in BHXBs GX 339-4 and XTE J1550-564 show that a strong (upto 40 msec), hard/soft lag at low frequency between hard photons and soft photons vanishes with the launch of superluminal Radio jets and the integrated fractional rms drops simultaneously by a factor of 3-4. These observations are also found true for other BHXBs like GRS 1915+105, XTE J1748-288, GRO J1655-40 and V4641 Sgr. On the other hand, onset of transient Radio jets during soft to hard transition is also associated with the reappearance of strong, positive lag and increased fractional rms. Lag and rms spectral shapes also change significantly across jet profile providing a key indication on the connection between the origin of superluminal jets and state transitions with finer details. A correlation between energy spectral properties and observed lag and rms spectral properties across ballistic jets is searched for different black hole mass as well as spin parameter ranges. |