82 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Centre for Radio AstrophysicsIN6 papers
- S.N. Bose National Centre for Basic SciencesIN5 papers
- Harish-Chandra Research InstituteIN4 papers
- Gebze Technical UniversityTR3 papers
- Bhabha Atomic Research CentreIN2 papers
- Saha Institute of Nuclear PhysicsIN2 papers
- University of the Western CapeZA2 papers
- Variable Energy Cyclotron CentreIN2 papers
- African Institute for Mathematical SciencesZA1 paper
- Australian University, KuwaitKW1 paper
- Bose InstituteIN1 paper
- Clausthal University of TechnologyDE1 paper
22 papers
CosmoReionMC: A package for estimating cosmological and astrophysical parameters using CMB, Lyman-α absorption and global 21 cm data
Atrideb Chatterjee, Tirthankar Roy Choudhury, Sourav Mitra
We present a Markov Chain Monte Carlo (MCMC)-based parameter estimation package, CosmoReionMC, to jointly constrain cosmological parameters of the CDM model and the astrophysica…
Hybrid analytic and machine-learned baryonic property insertion into galactic dark matter haloes
Ben Moews, Romeel Davé, Sourav Mitra +2
While cosmological dark matter-only simulations relying solely on gravitational effects are comparably fast to compute, baryonic properties in simulated galaxies require complex hy…
Constraints on dark matter annihilation in dwarf spheroidal galaxies from low frequency radio observations
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +2
We present the first observational limits on the predicted synchrotron signals from particle Dark Matter annihilation models in dwarf spheroidal galaxies at radio frequencies below…
Heavy dark matter particle annihilation in dwarf spheroidal galaxies: radio signals at the SKA telescope
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1
A weakly interacting dark matter candidate is difficult to detect at high-energy colliders like the LHC, if its mass is close to, or higher than a TeV. On the other hand, pair-anni…
Can SKA--Phase 1 go much beyond the LHC in supersymmetry search?
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1
We study the potential of the Square Kilometre Array in the first phase (SKA1) in detecting dark matter annihilation signals from dwarf spheroidals in the form of diffuse radio syn…
First study of reionization in the Planck 2015 normalized closed CDM inflation model
Sourav Mitra, Tirthankar Roy Choudhury, Bharat Ratra
We study reionization in two non-flat CDM inflation models that best fit the Planck 2015 cosmic microwave background anisotropy observations, ignoring or in conjunction with bar…
Dark matter, extra-terrestrial gamma-rays and the MSSM: a viability study
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1
We fit the -ray excess from the galactic centre (GC) in terms of parameters of the minimal supersymmetric standard model (MSSM). Consistency with other -ray observation, such…
Constraining the contribution of active galactic nuclei to reionisation
Sultan Hassan, Romeel Davé, Sourav Mitra +3
Recent results have suggested that active galactic nuclei (AGN) could provide enough photons to reionise the Universe. We assess the viability of this scenario using a semi-numeric…
Cheillini integrability and quadratically damped oscillators
Ankan Pandey, A. Ghose Choudhury, Partha Guha
In this paper a new approach to study an equation of the Lienard type with a strong quadratic damping is proposed based on Jacobi's last multiplier and Cheillini's integrability co…
On Integrals, Hamiltonian and Metriplectic Formulations of 3D Polynomial Systems
Oğul Esen, Anindya Ghose Choudhury, Partha Guha
We apply the Darboux integrability method to determine first integrals and Hamiltonian formulations of three dimensional polynomial systems; namely the reduced three-wave interacti…
Bi-Hamiltonian Structures of Chaotic Dynamical Systems in 3D
Oğul Esen, Anindya Ghose Choudhury, Partha Guha
We study Poisson structures of dynamical systems with three degrees of freedom which are known for their chaotic properties, namely Lü, modified Lü, Chen, and Qi systems. We sh…
Superintegrable Cases of Four Dimensional Dynamical Systems
Oğul Esen, Anindya Ghose Choudhury, Partha Guha +1
Degenerate tri-Hamiltonian structures of Shivamoggi and generalized Raychaudhuri equations are exhibited. For certain specific values of the parameters, it is shown that hyperchaot…
Study of depth profile of hydrogen in hydrogenated diamond like carbon thin film using ion beam analysis techniques
J Datta, H S Biswas, P Rao +5
The Hydrogenated Diamond Like Carbon (HDLC) thin films are deposited on Silicon substrate at room temperature using asymmetric capacitively coupled RF plasma with varying flow rate…
Raman spectra of electrochemically hydrogenated diamond like carbon surface
Hari Shankar Biswas, Jagannath Datta, Pintu Sen +2
Raman spectroscopy has been employed to distinguish between the Raman spectrum of pristine hydrogenated diamond like carbon (PHDLC) and that of electrochemically hydrogenated diamo…
A Lagrangian Description of the Higher-Order Painlevé Equations
A. Ghose Choudhury, Partha Guha, Nikolai A. Kudryashov
We derive the Lagrangians of the higher-order Painlevé equations using Jacobi's last multiplier technique. Some of these higher-order differential equations display certain remarka…
Separation of variables for a lattice integrable system and the inverse problem
Supriya Mukherjee, A. Ghose Chowdhury, A. Roy Chowdhury
We investigate the relation between the local variables of a discrete integrable lattice system and the corresponding separation variables, derived from the associated spectral cur…
On the universality of distribution of ranked cluster masses at critical percolation
Parongama Sen
The distribution of masses of clusters smaller than the infinite cluster is evaluated at the percolation threshold. The clusters are ranked according to their masses and the distri…
The effect of interactions on Bose-Einstein condensation in a two-dimensional harmonic trap
R. K. Bhaduri, S. M. Reimann, S. Viefers +2
A dilute bose gas in a quasi two-dimensional harmonic trap and interacting with a repulsive two-body zero-range potential of fixed coupling constant is considered. Using the Thomas…
Optimal Universal Disentangling Machine for Two Qubit Quantum States
Sibasish Ghosh, Somshubhro Bandyopadhyay, Anirban Roy +2
We derive the optimal curve satisfied by the reduction factors, in the case of universal disentangling machine which uses only local operations. Impossibility of constructing a bet…
Comparative study of spanning cluster distributions in different dimensions
Parongama Sen
The probability distributions of the masses of the clusters spanning from top to bottom of a percolating lattice at the percolation threshold are obtained in all dimensions from tw…
Non-local conservation in the coupling field: effect on critical dynamics
Parongama Sen
We consider the critical dynamics of a system with an -component non-conserved order parameter coupled to a conserved field with long range diffusion. An exponent characteri…
Metastability in Monte Carlo simulation of 2D Ising films and in Fe monolayer strips
Parongama Sen, D. Stauffer, U. Gradmann
Effective Curie temperatures measured in Fe monolayer strips agree reasonable with computer sinulations of two-dimensional Ising model strips. The simulations confirm the domain st…