Spectral Analysis of $\chi$ Class Data of GRS 1915+105 Using TCAF Solution

Abstract

The class variable source GRS 1915+105 exhibits a wide range of time variabilities in time scales of a few seconds to a few days. Depending on the count rates in different energy bands and the nature of the conventional color-color diagram, the variabilities were classified into sixteen classes, which were later sequenced in ascending order of Comptonization Efficiency (CE). The CE is the ratio of the phenomenological power-law and disk blackbody model fitted spectral photon fluxes. For a better understanding of the flow dynamics in one of the variability classes, namely $\chi$, we fitted spectra with the physical two-component advective flow (TCAF) model. In $\chi$ class, X-ray flux is steady with no significant variation, however, various $\chi$ subclasses are observed at different X-ray flux and variations of count rates across different $\chi$ subclasses must be linked to the variation of flow parameters such as the accretion rates, be it the Keplerian disc rate and/or the low angular momentum halo rate. We find that in the ${\chi }_{2,4}$ classes, which are reportedly devoid of significant outflows, the spectra could be fitted well using TCAF solution alone. In the ${\chi }_{1,3}$ class, which are always linked with outflows, a cutoff power-law model is needed in addition to the TCAF solution. At the same time, the normalization required by this model along with the variation of photon index and exponential roll-off factor provides us with the information on the relative dominance of the outflow in the latter two classes. TCAF fit also provides us with the size and location of the Compton cloud along with its optical depth. Thus by fitting with TCAF, a physical understanding of the flow geometry in different $\chi$ classes of GRS 1915+105 has been obtained.

arXiv comment13 pages, 6 figures, 3 tables, Accepted for publication in Research in Astronomy and Astrophysics on June 4, 2020 (Original version submitted on February 20, 2020)

References in corpus (46)

• X-ray Properties of Black-Hole Binaries
• Towards a unified model for black hole X-ray binary jets
• Spectral Properties of Accretion Disks Around Galactic and Extragalactic Black Holes
• GRS 1915+105 and the Disc-Jet Coupling in Accreting Black Hole Systems
• A Parallax Distance to the Microquasar GRS 1915+105 and a Revised Estimate of its Black Hole Mass
• Hard X-ray states and radio emission in GRS 1915+105
• High resolution Chandra HETG and RXTE observations of GRS 1915+105 : A hot disk atmosphere & cold gas enriched in Iron and Silicon
• The Chandra HETGS and RXTE view of GRS 1915+105
• Two Different Long-term Behaviors in Black-Hole Candidates: Evidence for Two Accretion Flows?
• Correlation among QPO frequencies and Quiescence-state Duration in Black Hole Candidate GRS 1915+105
• Identification of the donor in the X-ray binary GRS 1915+105
• Measuring the Spin of GRS 1915+105 with Relativistic Disk Reflection
• Spectral Properties of Accretion Disks Around Black Holes II -- Sub-Keplerian Flows With and Without Shocks
• Implementation of Two Component Advective Flow Solution in XSPEC
• On the origin of the various types of radio emission in GRS 1915+105
• Hydrodynamic Simulation of Two Component Advective Flows around Black Holes
• Accretion flow dynamics of MAXI J1836-194 during its 2011 outburst from TCAF solution
• Characterization of GX 339-4 outburst of 2010-11: analysis by xspec using two component advective flow model
• Different types of X-ray bursts from GRS 1915+105 and their origin
• Evolution of X-Ray Properties of MAXI J1535-571: Analysis with the TCAF Solution
• Inference on accretion flow dynamics using TCAF solution from the analysis of spectral evolution of H 1743-322 during 2010 outburst
• Estimation of Mass of the Black Hole Candidate MAXI J1659-152 using TCAF and POS Models
• The 1998 outburst of XTE J1550-564: a model based on multiwavelength observations
• Accretion Flow Properties of MAXI J1543-564 During 2011 Outburst from TCAF Solution
• The 2004 Outburst of BHC H1743-322: Analysis of spectral and timing properties using the TCAF Solution
• Accretion Flow Dynamics of MAXI J1659-152 from the Spectral Evolution Study of its 2010 Outburst using the TCAF Solution
• Observational evidence for mass ejection during soft X-ray dips in GRS1915+105
• Accretion Flow Properties of Swift J1753.5-0127 during its 2005 outburst
• Effects of Compton Cooling on Outflow in a Two Component Accretion Flow around a Black Hole: Results of a Coupled Monte Carlo-TVD Simulation
• Accretion Flow Evolution of a New Black Hole Candidate MAXI J1348-630 During the 2019 Outburst
• Properties of X-ray Flux of Jets During 2005 Outburst of Swift J1753.5-0127 Using TCAF Solution
• Spectral study of GX 339-4 with TCAF using Swift/XRT and NuSTAR Observation
• Properties of the Black Hole Candidate XTE J1118+480 with the TCAF solution during its Jet Activity Induced 2000 Outburst
• Disk-Jet Connection in the Microquasar GRS 1915+105 and IR and Radio Emission
• Inference on Accretion Flow Properties of XTE J1752-223 During Its 2009-10 Outburst
• Inference on Disk-Jet Connection of MAXI J1836-194: Analysis with the TCAF Solution
• Connection between accretion disk and superluminal radio jets and the role of radio plateau state in GRS 1915+105
• Comptonization efficiencies of the variability classes of GRS 1915+105
• Accretion Flow Properties of XTE J1118+480 During Its 2005 Outburst
• 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
• X-ray Spectral Analysis of the Steady States of GRS 1915+105
• Monte Carlo Simulations of Thermal Comptonization Process in a Two Component Advective Flow around a Neutron Star
• Evidence of variation of the accretion flow geometry in GRS 1915+105 from IXAE and RXTE data
• Timing Properties of Shocked Accretion Flows around Neutron Stars in Presence of Cooling
• Anomalous Outbursts of H 1743-322

Cited by in corpus (5)

• Relation Between Quiescence and Outbursting Properties of GX 339-4
• Accretion Properties of MAXI J1813-095 during its Failed Outburst in 2018
• Accretion Flow Properties of GRS 1915+105 During Its $\theta$ Class Using AstroSat Data
• On the nature of jets from a main sequence companion at the onset of common envelope evolution
• Similarities and Differences in Accretion Flow Properties between GRS 1915+105 and IGR J17091-3624: a Case Study