323 citations · 1.4k across the 51 of their papers we have counts for
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Strange Stars : An interesting member of the compact object family
Manjari Bagchi, Subharthi Ray, Jishnu Dey +1
We have studied strange star properties both at zero temperature and at finite temperatures and searched signatures of strange stars in gamma-ray, x-ray and radio astronomy. We hav…
Bound for entropy and viscosity ratio for strange quark matter
Manjari Bagchi, Jishnu Dey, Mira Dey +4
High energy density ($\eps$) and temperature (T) links general relativity and hydrodynamics leading to a lower bound for the ratio of shear viscosity () and entropy density (…
Members of the double pulsar system PSR J0737-3039 : neutron stars or strange stars ?
Manjari Bagchi, Jishnu Dey, Sushan Konar +2
One interesting method of constraining the dense matter Equations of State is to measure the advancement of the periastron of the orbit of a binary radio pulsar (when it belongs to…
Chromo-thermal oscillations and collapse of strange stars to black holes : Astrophysical Implications
Manjari Bagchi, Rachid Ouyed, Jan Staff +3
The effects of temperature on strange stars are studied and it is found that the maximum mass of the star decreases with the increase of temperature since at high temperatures the…
Strange stars at finite temperature
Subharthi Ray, Manjari Bagchi, Jishnu Dey +1
We calculate strange star properties, using large N_c approximation with built-in chiral symmetry restoration (CSM). We used a relativistic Hartree Fock mean field approximation me…
Compact strange stars with a medium dependence in gluons at finite temperature
Manjari Bagchi, Subharthi Ray, Mira Dey +1
The possible existence of strange stars in the universe will help in the understanding of various properties of quantum chromodynamics, like asymptotic freedom and chiral symmetry…
Strange Pulsar Hypothesis
Raka Dona Ray Mandal, Monika Sinha, Manjari Bagchi +3
It appears that there is a genuine shortage of radio pulsars with surface magnetic fields significantly smaller than Gauss. We propose that the pulsars with very low ma…
Strange Star Equation of State With a Modified Richardson Potential
Manjari Bagchi, Subharthi Ray, Mira Dey +1
Richardson potential is an phenomenological interquark interaction taking care of two aspects of QCD, namely the asymptotic freedom and the confinement. The original potential has…
Newtonian and general relativistic contribution of gravity to surface tension of strange stars
Manjari Bagchi, Monika Sinha, Mira Dey +2
Surface tension (S) is due to the inward force experienced by particles at the surface and usually gravitation does not play an important role in this force. But in compact stars t…
Strange stars and superbursts at near-Eddington mass accretion rates
Monika Sinha, Subharthi Ray, Mira Dey +1
Careful assessment of four good superburst candidates for GX 17+2 reveals that superburst is possible at near Eddington mass accretion rates. For the other seven stars, where super…
Stability of strange stars (SS) under radial oscillation
Monika Sinha, Jishnu Dey, Mira Dey +2
A realistic Equation of State (EOS) leads to strange stars (ReSS) which are compact in the mass radius plot, close to the Schwarzchild limiting line (Dey et al. 1998). We carry out…
General relativistic effects of strong magnetic fields on the gravitational force: a driving engine for bursts of gamma rays in SGRs?
Manuel Malheiro, Subharthi Ray, Herman J. M. Cuesta +1
In general relativity all forms of energy contribute to gravity and not only just ordinary matter as in Newtonian Physics. This fact can be seen in the modified hydrostatic equilib…
Possible evidence of surface vibration of strange stars from stellar observations
Subharthi Ray, Jishnu Dey, Mira Dey +1
Emission lines in the eV and keV range by certain stellar candidates from their recent analysis invoke the question of their possible origin. These stars under consideration, are t…
Theoretical Description of kHz QPOs in accreting LMXB systems
Banibrata Mukhopadhyay, Subharthi Ray, Jishnu Dey +1
We describe kHz QPOs from the hydrodynamical model of accretion disks for LMXB systems. Out of the pair, the higher frequency originates due to the viscous effects of an accretion…
Have we observed the skin vibration of realistic strange stars (ReSS) ?
Monika Sinha, Jishnu Dey, Mira Dey +2
Skin vibration of ReSS and consequent resonance absorption can account for the absorption lines in the spectrum of X-ray emission from many compact stellar objects and in particula…
Origin and interpretation of kilohertz QPOs from strange stars in X-ray binary system: theoretical hydrodynamical description
Banibrata Mukhopadhyay, Subharthi Ray, Jishnu Dey +1
We model and interpret the Kilohertz QPOs from the hydrodynamical description of accretion disk around a rapidly rotating compact strange star. The higher QPO frequency is describe…
Stability of strange stars (SS) derived from a realistic equation of state
Monika Sinha, Jishnu Dey, Mira Dey +3
A realistic equation of state (EOS) leads to realistic strange stars (ReSS) which are compact in the mass radius plot, close to the Schwarzchild limiting line (Dey et al 1998). Man…
Superbursts and long bursts as surface phenomenon of compact objects
Monika Sinha, Mira Dey, Subharthi Ray +1
X-ray bursts from compact stars is believed to be due to type I thermonuclear processes which are short lived, typically ~ 10 to 100 s. There are some low mass X-ray binaries (LMXB…
Quark-Nova
R. Ouyed, J. Dey, M. Dey
We explore the scenario where the core of a neutron star (having experienced a transition to an up and down quark phase) shrinks into the equilibrated quark object after reaching s…
Stability of realistic strange stars (RSS)
Siddhartha Bhowmick, Jishnu Dey, Mira Dey +2
A modified version of this paper is under process and with a new title and abstract. Hence, this version of the article is completely withdrawn.
Rotating compact strange stars
D. Gondek-Rosinska, T. Bulik, J. L. Zdunik +4
We compute numerical models of uniformly rotating strange stars (SS) in general relativity for the recently proposed QCD-based equation of state (EOS) of strange quark matter (Dey…
Density dependent strong coupling constant of QCD derived from compact star data
Subharthi Ray, Jishnu Dey, Mira Dey
The present work is an endeavour to connect the properties of tiny nearly massless objects with those of some of the most massive ones, the compact stars. Since 1996 there is major…
Entropy & equation of state (EOS) for hot bare strange stars
S. Ray, J. Dey, M. Dey +2
Compactness of some stars is explained if they are strange stars (SS) as shown by Dey et al. (1998) (D98) and Li et al. (1999a). One of these compact star candidates is the SAX J18…
Glimpses of a strange star
Jishnu Dey, Subharthi Ray, Xiang-Dong Li +2
There are about 2000 gamma ray burst (GRB) events known to us with data pouring in at the rate of one per day. While the afterglows of GRBs in radio, optical and X-ray bands are su…