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
67 papers
Investigating the Circumgalactic Medium through Mg II absorption coincidence
Paryag Sharma, Raghunathan Srianand, Hum Chand +1
We present a statistical measurement of the transverse coherence of Mg II absorption using a large sample of 9204 absorber-centric quasar sightline pairs from t…
The eV-Scale Sterile Neutrino and Neutrinoless Double Beta Decay
Priya, Simran Arora, B. C. Chauhan
In short-baseline experiments such as LSND and MiniBooNE, an excess of electron neutrinos has been observed, originating from a muon neutrino beam. To address this anomaly, in the…
Evaporation of Primordial Black Holes in a Thermal Universe: A Thermofield Dynamics Approach
Ayan Chatterjee, Jitumani Kalita, Debaprasad Maity
We investigate the impact of a finite temperature environment on the Hawking radiation from black holes (BHs), with particular focus on Kerr BHs immersed in a cosmological thermal…
Spherical trapped surfaces in n-dimensional general relativity
Ayan Chatterjee, Suresh C. Jaryal, Akshay Kumar
In this paper, we examine gravitational collapse of matter fields in -dimensional general relativity. The matter energy-momentum tensor under consideration includes dust, perfec…
Brightness and colour variability in NLSy1s
Madhu Sudan, Hum Chand, Paul J. Wiita +1
The Zwicky Transient Facility (ZTF), with its extensive optical monitoring capabilities, has provided an unprecedented opportunity to study the long-term variability of active gala…
Circumgalactic medium of quasar host galaxies at 0.4<z<0.8 probed by strong Mg II absorption
Paryag Sharma, Raghunathan Srianand, Hum Chand +1
Using a sample of 166 projected quasar pairs we investigate the influence of active galactic nuclei on the circumgalactic medium (CGM) of the quasar host galaxies probed using stro…
Type-III Scotogenic Model: Inflation, Dark Matter and Collider Phenomenology
Labh Singh, Rahul Srivastava, Surender Verma +1
We investigate an extension of the Type-III scotogenic model by incorporating a real singlet scalar. This scalar plays a crucial role as the inflaton due to its non-minimal couplin…
Embedding Generalized CP Symmetry in One Zero Texture Neutrino Mass Models
Priya, Simran Arora, B. C. Chauhan
In this study, we investigate one zero textures within the framework of generalized CP symmetry associated with the complex tribimaximal matrix. By combining these approaches, we d…
Intranight optical monitoring of the rare quasar J0950+5128, the brightest known candidate for transition from radio-quiet to radio-loud state
Krishan Chand, Gopal-Krishna, Hum Chand
We report a novel pilot project to characterise intra-night optical variability (INOV) of an extremely rare type of quasar, which has recently been caught in the act of transiting…
TeV Scale Resonant Leptogenesis with triplet Fermion in Connection to Muon
Simran Arora, Devabrat Mahanta, B. C. Chauhan
We propose an extension of the minimal scotogenic model with a triplet fermion and a singlet scalar. An imposed symmetry allows only diagonal Yukawa couplings a…
Effects of electromagnetic field on a radiating star
Suresh C. Jaryal, Ayan Chatterjee, Akshay Kumar
In this paper we study the shear free spherical symmetric gravitational collapse of charged radiating star. All the physical quantities including pressure, density are regular. Ene…
Bulk and neutron-proton asymmetry coefficients of the semi-empirical mass formula tuned to ground state mass excess of AME2020 and/or FRDM(2012)
Dalip Singh Verma, Vivek, Kushmakshi
Davidson et al. has extended Seeger's mass formula to non-zero excitation energies by introducing temperature-dependent coefficients in the liquid drop energy part of the semi-empi…
Inverse Potentials for all l-channels of Neutron-Proton Scattering using Reference Potential Approach
Anil Khachi, Lalit Kumar, Ayushi Awasthi +1
Reference potential approach (RPA) is successful in obtaining inverse potentials for weakly bound diatomic molecules using Morse function. In this work, our goal is to construct in…
Evidence of under-developed torus and broad-line region of weak emission line quasars based on their spectral energy distribution
Ritish Kumar, Hum Chand, Ravi Joshi
To unravel the dominant cause of the weak emission line in a subset of optically selected radio-quiet 'weak emission line quasars' (WLQs), we have investigated the possibility of a…
The height of chitinous ridges alone produces the entire structural colour palette
Hemant Kumar Raut, Qifeng Ruan, Cédric Finet +3
The colourful wings of butterflies result from the interaction between light and the intricate chitinous nanostructures on butterflies' scales. This study demonstrates that just by…
Gauged Symmetry and two-zero Textures of Inverse Neutrino Mass Matrix in light of Muon ()
Labh Singh, Monal Kashav, Surender Verma
In the framework of anomaly free model, charged scalar fields give rise to massive gauge boson () through spontaneous symmetry breaking. leads to…
Trimaximal Mixing and Extended Magic Symmetry in a Model of Neutrino Mass Matrix
Labh Singh, Tapender, Monal Kashav +1
The trimaximal mixing scheme (TM) results in \textit{``magic"} neutrino mass matrix () which is known to accommodate neutrino oscillation data. In this paper, we propose a…
Muon () in Scotogenic Model Extended with Vector like Fermion
Simran Arora, Monal Kashav, Surender Verma +1
The latest results of anomalous muon magnetic moment at Fermilab show a discrepancy of 4.2 between the Standard Model (SM) prediction and experimental value. In this work, we r…
Evidence of jet induced optical microvariability in radio-loud Narrow Line Seyfert 1 Galaxies
Vineet Ojha, Vivek Kumar Jha, Hum Chand +1
To quantify the role of radio jets for Intra-Night Optical Variability (INOV) in Radio-Loud Narrow-Line Seyfert 1 (RLNLSy1) galaxies, we report the first systematic comparative INO…
Generalized Interacting Dark Energy Model and Loop Quantum Cosmology
Suryakanta Swain, Debasis Sahu, Debabrata Dwivedee +2
The recently observed accelerated expansion of the universe has put a challenge for its theoretical understanding. As a possible explanation of this, it is considered that the most…
On Minimal realization of Topological Lorentz Structures with one-loop Seesaw extensions in A Modular Symmetry
Monal Kashav, Surender Verma
The topological classification of one-loop Weinberg operator at dimension-5 leads to systematic categorization of one-loop neutrino mass models. All one-loop neutrino mass models m…
Investigating Two-zero Textures of Inverse Neutrino Mass Matrix under the Lamp Post of LMA and LMA-D Solutions and Symmetry Realization
Labh Singh, Monal Kashav, Surender Verma
In this work we have investigated the phenomenological consequences of two-zero textures of \textit{inverse} neutrino mass matrix () in light of the large mixing angle (L…
Emergent dynamics in an astrocyte-neuronal network coupled via nitric oxide
Bhanu Sharma, Spandan Kumar, Subhendu Ghosh +1
In the brain, both neurons and glial cells work in conjunction with each other during information processing. Stimulation of neurons can cause calcium oscillations in astrocytes wh…
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…