448 citations · 1.3k across the 32 of their papers we have counts for
33 papers
Quiescence of an Outburst of a Low-Mass Young Stellar Object: LDN1415-IRS
Koshvendra Singh, Devendra K. Ojha, Joe P. Ninan +5
LDN1415-IRS, a low-mass young stellar object (YSO) went into an outburst between 2001 and 2006, illuminating a surrounding nebula, LDN1415-Neb. LDN1415-Neb was found to have bright…
Spectroscopy of 9 eruptive young variables using TANSPEC
Arpan Ghosh, Saurabh Sharma, Joe P. Ninan +8
In recent times, 3.6m Devasthal Optical Telescope (DOT) has installed an optical to near infra-red spectrograph, TANSPEC, which provides spectral coverage from 0.55-2.5 microns. Us…
pyTANSPEC: A Data Reduction Package for TANSPEC
Supriyo Ghosh, Joe P. Ninan, Devendra K. Ojha +1
The TIFR-ARIES Near Infrared Spectrometer (TANSPEC) instrument provides simultaneous wavelength coverage from 0.55 to 2.5 micron, mounted on India's largest ground-based telescope,…
Solvable Limits of a class of generalized Vector Nonlocal Nonlinear Schrödinger equation with balanced loss-gain
Supriyo Ghosh, Pijush K. Ghosh
We consider a class of one dimensional Vector Nonlocal Non-linear Schrödinger Equation (VNNLSE) in an external complex potential with time-modulated Balanced Loss-Gain(BLG) and Lin…
Theoretical investigations on Kerr and Faraday rotations in topological multi-Weyl Semimetals
Supriyo Ghosh, Ambaresh Sahoo, Snehasish Nandy
Motivated by the recent proposal of giant Kerr rotation in WSMs, we investigate the Kerr and Faraday rotations in time-reversal broken multi-Weyl semimetals (mWSMs) in the absence…
-band Temperature and Metallicity Indicators for Cool Giants: Empirical Relations in Bayesian Framework
Supriyo Ghosh, J. P. Ninan, D. K. Ojha
We explored here the near-infrared -band atmospheric window aiming to provide quantitative diagnostic tools for deriving stellar parameters, for instance, effective temperature…
TIFR Treasures for Astronomy from Ground to Space
Supriyo Ghosh, Devendra K. Ojha, Saurabh Sharma +1
The infrared astronomy group of Department of Astronomy and Astrophysics at Tata Institute of Fundamental Research has been pursuing astronomical instrumentation activities since i…
Non-linear Schrdinger equation with time-dependent balanced loss-gain and space-time modulated non-linear interaction
Supriyo Ghosh, Pijush K. Ghosh
We consider a class of one dimensional vector Non-linear Schrdinger Equation(NLSE) in an external complex potential with Balanced Loss-Gain(BLG) and Linear Coupling(LC) a…
Spectroscopic and photometric monitoring of a poorly known high-luminous OH/IR star: IRAS 18278+0931
Supriyo Ghosh, Soumen Mondal, Ramkrishna Das +1
We present the time-dependent properties of a poorly known OH/IR star IRAS 18278+0931 (hereafter, IRAS 18+09) towards the Ophiuchus constellation. We have carried out long-term…
New Temperature and Metallicity Scale of Cool Giants from K-band Spectra
Supriyo Ghosh, D. K. Ojha, J. P. Ninan
We present here quantitative diagnostic tools for cool giants that employ low-resolution near-infrared spectroscopy in the -band for stellar population studies. In this study, a…
Impact of Particle Arrays on Phase Separation Composition Patterns
Supriyo Ghosh, Arnab Mukherjee, Raymundo Arroyave +1
We examine the symmetry-breaking effect of fixed constellations of particles on the surface-directed spinodal decomposition of binary blends in the presence of particles whose surf…
Tusas: A fully implicit parallel approach for coupled phase-field equations
Supriyo Ghosh, Christopher K. Newman, Marianne M. Francois
We develop a fully-coupled, fully-implicit approach for phase-field modeling of solidification in metals and alloys. Predictive simulation of solidification in pure metals and meta…
Understanding Physical Properties of Young M-dwarfs: NIR spectroscopic studies
Dhrimadri Khata, Soumen Mondal, Ramkrishna Das +2
We present here medium resolution (λ/Δλ\sim1200) H- and K-band spectra of M type dwarf stars covering the wavelength range 1.50 - 1.80 μm and 1.95 - 2.45 μm. The sample includes 53…
Finite Interface Dissipation Phase Field Modeling of Ni-Nb under Additive Manufacturing Conditions
Kubra Karayagiz, Luke Johnson, Raiyan Seede +8
During the laser powder bed fusion (L-PBF) process, the built part undergoes multiple rapid heating-cooling cycles, leading to complex microstructures with nonuniform properties. I…
Exact relaxation dynamics and quantum information scrambling in multiply quenched harmonic chains
Supriyo Ghosh, Kumar S. Gupta, Shashi C. L. Srivastava
The quantum dynamics of isolated systems under quench condition exhibits a variety of interesting features depending on the integrable/chaotic nature of system. We study the exact…
Spectral Calibration of KM Giants from medium resolution near-infrared HK-band spectra
Supriyo Ghosh, Soumen Mondal, Ramkrishna Das +1
We present here new medium resolution spectra ( 1200) of KM giants covering wavelength range 1.501.80 and 1.952.45 m. The sample includes 72 K0M8 giants…
Uncertainty Analysis of Microsegregation during Laser Powder Bed Fusion
Supriyo Ghosh, Mohamad Mahmoudi, Luke Johnson +3
Quality control in additive manufacturing can be achieved through variation control of the quantity of interest (QoI). We choose in this work the microstructural microsegregation t…
Influence of morphological instability on grain boundary trajectory during directional solidification
Supriyo Ghosh, Alain Karma, Mathis Plapp +3
The interplay between the diffusion-controlled dynamics of a solidification front and the trajectory of a grain boundary groove at the solid-liquid interface is studied by means of…
Simulation of temperature, stress and microstructure fields during laser deposition of Ti-6Al-4V
Supriyo Ghosh, Kevin McReynolds, Jonathan E. Guyer +1
We study the evolution of prior columnar phase, interface phase, and phase during directional solidification of a Ti-6Al-4V melt pool. Finite element simulations estima…
Phase-dependent photometric and spectroscopic characterization of the MASTER-Net Optical Transient J212444.87+321738.3: an oxygen rich Mira
Supriyo Ghosh, Soumen Mondal, Ramkrishna Das +4
We describe the time-dependent properties of a new spectroscopically confirmed Mira variable, which was discovered in 2013 as MASTER-Net Optical Transient (OT) J212444.87+321738.3…
High-throughput assessment of vacancy formation and surface energies of materials using classical force-fields
Kamal Choudhary, Adam J. Biacchi, Supriyo Ghosh +3
In this work, we present an open access database for surface and vacancy-formation energies using classical force-fields (FFs). These quantities are essential in understanding diff…
On the Interfacial Phase Growth and Vacancy Evolution during Accelerated Electromigration in Cu/Sn/Cu Microjoints
Vahid Attari, Supriyo Ghosh, Thien Duong +1
In this work, we integrate different computational tools based on multi-phase-field simulations to account for the evolution of morphologies and crystallographic defects of Cu/Sn/C…
Single-Track Melt-Pool Measurements and Microstructures in Inconel 625
Supriyo Ghosh, Li Ma, Lyle E. Levine +4
We use single track laser melting experiments and simulations on Inconel 625 to estimate the dimensions and microstructures of the resulting melt pools. Our work is based on a desi…
Optical Photometric Variable Stars towards the Galactic \hii region NGC 2282
Somnath Dutta, Soumen Mondal, Santosh Joshi +3
We report here CCD -band time-series photometry of a young (25 Myr) cluster NGC 2282 to identify and understand the variability of pre-main-sequence (PMS) stars. The -band…