7 papers · 1 filter
The Polarized X-ray Universe: Insights and Discoveries
Arbind Pradhan, Sree Bhattacherjee, Biplob Sarkar
Polarization is one of the fundamental natures of electromagnetic radiation. The detection of polarization or polarized photons from distant X-ray radiating systems (such as X-ray…
Multifaceted Accretion: The Interplay of Turbulence, Resistivity, Thermal Transport, and Dust around Black Holes
Asish Jyoti Boruah, Liza Devi, Biplob Sarkar
Accretion near black holes (BHs) is multidimensional, with turbulence, resistivity, thermal transport, and dust dynamics all playing essential roles. In cold accretion discs (ADs)…
An Overview of the Effect of Self-Gravity on the Structure of Accretion Discs
Darashan Saikia, Liza Devi, Biplob Sarkar +1
In astrophysical systems like X-ray binaries (XRBs), active galactic nuclei (AGN), and young stellar objects (YSOs), we often observe a very fundamental structure called accretion…
An Overview of Rossby Wave Instability in Accretion Discs surrounding Black Holes
Bibhuti Bhusan Dutta, Liza Devi, Biplob Sarkar +1
The Rossby Wave Instability (RWI) has become an important concept in understanding the hydrodynamics (HDs) of accretion discs (ADs), especially in systems around black holes (BHs)…
Probing the energy-dependent temporal nature of MAXI J1803-298 with AstroSat and NICER
Arbind Pradhan, Akash Garg, Ranjeev Misra +1
We performed the spectral and temporal analysis of MAXI J1803-298 using AstroSat/LAXPC and NICER observations taken in May 2021 during the initial phase of the outburst. We found t…
Energy-dependent temporal study of GX 13+1 with AstroSat observation
Arbind Pradhan, Sree Bhattacherjee, Biplob Sarkar
In this work, we performed an energy-dependent study of low-frequency oscillations observed in GX 13+1 using \textit{AstroSat} (Large Area X-ray Proportional Counter and Soft X-ray…
Spectral evolution of GX 17+2 using AstroSat and NICER observations
Sree Bhattacherjee, Ranjeev Misra, Biplob Sarkar +3
We study the spectral evolution of the Z-track source GX 17+2 using AstroSat and NICER observations taken between 2016 and 2020. The AstroSat observations cover the period when the…