Class Transitions and Two Component Accretion Flow in GRS 1915+105

Abstract

The light curve of the galactic micro-quasar GRS 1915+105 changes in at least thirteen different ways which are called classes. We present examples of the transitions from one class to another as observed by the IXAE instrument aboard the Indian Satellite IRS-P3. We find that the transitions are associated with changes in photon counts over a time-scale of only a few hours and they take place through unknown classes. Assuming that the transitions are caused by variation of the accretion rates, this implies that a significant fraction of the matter must be nearly freely falling in order to have such dramatic changes in such a short time.

9 pages, 6 figures, Astronomy and Astrophys. (in press)

References in corpus (10)

• Spectral Properties of Accretion Disks Around Galactic and Extragalactic Black Holes
• An unusually massive stellar black hole in the Galaxy
• Resonance Oscillation Of Radiative Shock Waves In Accretion Disks Around Compact Objects
• Two Different Long-term Behaviors in Black-Hole Candidates: Evidence for Two Accretion Flows?
• A Transition to the Soft State in GRS 1758-258
• The effect of cooling on time dependent behaviour of accretion flows around black holes
• Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105
• X-ray properties of the microquasar GRS 1915+105 during a variability class transition
• Fast Transition between High-soft and Low-soft States in GRS 1915+105: Evidence for a Critically Viscous Accretion Flow
• Evidence of Class Transitions in GRS 1915+105 from IXAE Data

Cited by in corpus (9)

• The complex behaviour of the microquasar GRS 1915+105 in the rho class observed with BeppoSAX. I: Timing analysis
• Unraveling the foretime of GRS 1915+105 using AstroSat observations: Wide-band spectral and temporal characteristics
• Time-domain variability properties of XTE J1650-500 during its 2001 outburst: Evidence of disc-jet connection
• Comptonization efficiencies of the variability classes of GRS 1915+105
• Evolution of Accretion Disc Geometry of GRS~1915+105 during its $\chi$ state as revealed by TCAF solution
• Comptonizing Efficiencies of IGR 17091-3624 and its similarity to GRS 1915+105
• Comptonizing Efficiencies of IGR 17091-3624 and its similarity to GRS 1915+105
• Evidence of variation of the accretion flow geometry in GRS 1915+105 from IXAE and RXTE data
• Detection of QPO Soft Lag during Outburst of Swift J1727.8-1613: Estimation of Instrinsic Parameters from Spectral Study