88 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Aryabhatta Research Institute of Observational SciencesIN13 papers
- Indian Institute of AstrophysicsIN6 papers
- Inter-University Centre for Astronomy and AstrophysicsIN6 papers
- Deen Dayal Upadhyaya Gorakhpur UniversityIN5 papers
- Saha Institute of Nuclear PhysicsIN5 papers
- University of DelhiIN5 papers
- Center for Excellence in Basic SciencesIN3 papers
- Kavli Institute for Theoretical SciencesCN3 papers
- Peking UniversityCN3 papers
- Central University of JammuIN2 papers
- Kumaun UniversityIN2 papers
- Physical Research LaboratoryIN2 papers
13 papers · 1 filter
A comparative study of the physical properties for a representative sample of Narrow and Broad-line Seyfert galaxies
Vivek Kumar Jha, Hum Chand, Vineet Ojha +2
We present a comparative study of the physical properties of a homogeneous sample of 144 Narrow line Seyfert 1 (NLSy1) and 117 Broad-line Seyfert 1 (BLSy1) galaxies. These two samp…
Intranight variability of UV emission from powerful blazars
Krishan Chand, Gopal-Krishna, Amitesh Omar +4
We report the first study to characterise intranight variability of the blazar class from the perspective of (rest-frame) UV emission. For this, we carried out intranight optical m…
Optical Flux and Colour Variability of Blazars in the ZTF Survey
Vibhore Negi, Ravi Joshi, Krishan Chand +4
We investigate the temporal and colour variability of 897 blazars, comprising 455 BL Lacertae objects (BL Lacs) and 442 Flat Spectrum Radio Quasars (FSRQs), selected from the Roma-…
Scotogenesis in Hybrid Textures of Neutrino Mass Matrix and Neutrinoless Double Beta Decay
Ankush, Monal Kashav, Surender Verma +1
We study the connection between dark matter (DM) and neutrinoless double beta () decay in a scotogenic model with hybrid texture in the neutrino mass matrix. Characteristical…
Accretion Disk Sizes from Continuum Reverberation Mapping of AGN Selected from the ZTF Survey
Vivek Kumar Jha, Ravi Joshi, Hum Chand +4
We present the accretion disk size estimates for a sample of 19 active galactic nuclei (AGN) using the optical , , and band light curves obtained from the Zwicky Transien…
A Search for Blazar Activity in Broad-Absorption-Line Quasars
Sapna Mishra, Gopal-Krishna, Hum Chand +3
Our recently reported lack of Intra-Night Optical Variability (INOV) among Broad-Absorption-Line (BAL) quasars exhibiting some blazar-like radio properties, either questions polar…
Gravitational Collapse in the EGB Gravity
Ayan Chatterjee, Avirup Ghosh, Suresh Jaryal
The Einstein- Gauss- Bonnet (EGB) gravity is an important modification of the Einstein theory of gravity and, for many gravitational phenomena, the Gauss- Bonnet (GB) correction te…
Constraining the ratio of median pixel optical depth profile around z ~ 4 quasars using the longitudinal proximity effect
Priyanka Jalan, Hum Chand, Raghunathan Srianand
We present a detailed study of the longitudinal proximity effect using a sample of 85 quasars spanning an emission redshift range of and Lyman continuum…
Gravitationally collapsing stars in gravity
Ayan Chatterjee, Suresh C. Jaryal
The gravitational dynamics of a collapsing matter configuration which is simultaneously radiating heat flux is studied in gravity. Three particular functional forms in $f(R)…
Electron-Phonon Mediated Superconductivity in 1T MoS2 and Effect of Pressure on the Same
Jagdish Kumar, Harkirat Singh
Density functional theory (DFT) based ab-initio calculations of electronic, phononic, and superconducting properties of 1T MoS2 are reported. The phonon dispersions are computed wi…
Appearance vs Disappearance of broad absorption line troughs in quasars
Sapna Mishra, M. Vivek, Hum Chand +1
We present a new set of 84 Broad absorption line (BAL) quasars ( 1.7 \zem 4.4) exhibiting an appearance of \civ BAL troughs over 0.34.8 rest-frame years by comparing the…
Broken Scaling Neutrino Mass Matrix and Leptogenesis based on A Modular invariance
Monal Kashav, Surender Verma
In this work, we have proposed a modular symmetric model of neutrino mass which, simultaneously, explains observed baryon asymmetry of the Universe(BAU). In minimal extension…
Radiating-collapsing models satisfying Karmarkar condition
Suresh C. Jaryal
This paper presents a class of exact spherical symmetric solutions of the Einstein equations admitting heat-conducting anisotropic fluid as a collapsing matter. The exterior spacet…