6 papers · 1 filter
A Hydrodynamical Thermal Irradiated Wind from the Outer Thin Accretion Disk in Low-luminosity Active Galactic Nuclei
Nagendra Kumar
Evidently, low-luminosity active galactic nuclei (LLAGNs) are comprised of an inner advective disk and an outer geometrically thin disk. Wind is inevitable in LLAGNs, mainly interp…
Plane Polarization in Comptonization process : a Monte Carlo study
Nagendra Kumar
High energies emissions observed in X-ray binaries (XRBs), active galactic nuclei (AGNs) are linearly polarized. The prominent mechanism for X-ray is the Comptonization process. We…
Thermal irradiation induced wind outflow in a geometrically thin accretion disk: A hydrodynamic study
Nagendra Kumar, Banibrata Mukhopadhyay
Many astrophysical sources, e.g., cataclysmic variables, X-ray binaries, active galactic nuclei, exhibit a wind outflow, when they reveal a multicolor blackbody spectrum, hence har…
Blazars SED in Conical Plasma Flow : a Monte Carlo study
Nagendra Kumar, Pankaj Kushwaha
Blazars host the most powerful persistent relativistic conical jet -- a highly collimated anisotropic flow of material/plasma. Motivated by this, we explore the blazar's broadband…
High energy power-law tail in X-ray binaries and bulk Comptonization due to a outflow from a disk
Nagendra Kumar
We study the high energy power-law tail emission of X-ray binaries (XRBs) by a bulk Comptonization process which usually observe in the very high soft VHS state of blackhole BH XRB…
Constraining the size of the Comptonizing medium by modeling the energy dependent time-lags of kHz QPOs of Neutron star system
Nagendra Kumar, Ranjeev Misra
In earlier works, we had shown that the observed soft lags and r.m.s versus energy of the lower kHz QPO of neutron star binaries can be explained in the framework of a thermal Comp…