Browsing Journal Articles by Title

Browsing Journal Articles by Title

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  • Garattini, Remo; Majumder, Barun (Elsevier, 2014-07)
    We compute the Zero Point Energy (ZPE) induced by a naked singularity with the help of a reformulation of the Wheeler–DeWitt equation. A variational approach is used for the calculation with Gaussian Trial Wave Functionals. ...
  • Sengupta, Anand (American Physical Society, 2015-01)
    In this paper we present the results of a coherent narrow-band search for continuous gravitational-wave signals from the Crab and Vela pulsars conducted on Virgo VSR4 data. In order to take into account a possible small ...
  • Hati, Chandan; Sarkar, Utpal (Springer Berlin Heidelberg, 2016-05)
    We propose a realization of mass varying neutrino dark energy in two extensions of the Standard Model (SM) with a dynamical neutrino mass related to the acceleron field while satisfying the naturalness. In the first scenario ...
  • Joshipura, Anjan S.; Nath, Newton (American Physical Society, 2016-08)
    We discuss the consequences of assuming that the (Majorana) neutrino mass matrix Mν and the charged lepton mass matrix Ml satisfy STνMνSν=−Mν and T†lMlM†lTl=MlM†l with respect to some discrete groups Sν and Tl contained ...
  • Deppisch, Frank F.; Hati, Chandan; Patra, Sudhanwa; Pritimita, Prativa; Sarkar, Utpal (American Physical Society, 2018-02)
    We discuss a class of left-right symmetric theories with a universal seesaw mechanism for fermion masses and mixing and the implications for neutrinoless double beta (0νββ)decay where neutrino masses are governed by natural ...
  • Ghosh, Monojit; Ghoshal, Pomita; Goswami, Srubabati; Nath, Newton; Raut, Sushant K. (American Physical Society, 2016-01)
    The three major unknown neutrino oscillation parameters at the present juncture are the mass hierarchy, the octant of the mixing angle θ23 and the CP phase δCP. It is well known that the presence of hierarchy-δCP and octant ...
  • K. N., Vishnudath; Choubey, Sandhya; Goswami, Srubabati (APS, 2019-05)
    We study the implications of the Dark-LMA (DLMA) solution to the solar neutrino problem for neutrinoless double beta decay (0???). We show that, while the predictions for the effective mass governing 0??? remain unchanged ...
  • Aarthy, Esakkiappan; Rai, Archita; Ganesh, Shashikiran; Vadawale, Santosh V. (Society of Photo-optical Instrumentation Engineers, 2019-08)
    Near infrared camera spectrograph and polarimeter (NICSPol) is a near-infrared (NIR) imaging polarimeter developed for the Near-Infrared Camera and Spectrograph (NICS), one of the backend instruments of the 1.2-m Cassegrain ...
  • Sengupta, Anand (IOP Science, 2014-05)
    The Numerical INJection Analysis (NINJA) project is a collaborative effort between members of the numerical relativity and gravitational-wave (GW) astrophysics communities. The purpose of NINJA is to study the ability to ...
  • Bhattacharjee, Srijit; Sarkar, Sudipta (American Physical Society, 2017-04)
    We prove the nonexistence of massive scalar, vector and tensor hairs outside the surface of a static and stationary compact reflecting star. Our result is the extension of the no-hair theorem for black holes to horizonless ...
  • Vaity, Pravin; Chithrabhanu, P.; Salla, Gangi Reddy; Prabhakar, Shashi; Singh, Ravindra P. (The Optical Society, 2016-02)
    Vector vortex beams are classified into four types depending upon spatial variation in their polarization vector. We have generated all four of these types of vector vortex beams by using a modified polarization Sagnac ...
  • Awada, Adel; Ali, Ahmed Farag; Majumder, Barun (IOP Publishing, 2013-10)
    In this work, we study FRW cosmologies in the context of gravity rainbow. We discuss the general conditions for having a nonsingular FRW cosmology in gravity rainbow. We propose that gravity rainbow functions can be fixed ...
  • Sengupta, Anand (American Physical Society, 2016-02)
    On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from ...
  • Mandal, Subir; Pallamraju, Duggirala; Karan, Deepak K.; Phadke, Kedar A.; Singh, Ravindra P.; Suryawanshi, Pradip (Wiley, 2019-07)
    The importance of neutral wave dynamics in the understanding of the upper atmospheric processes is well?known. Conventionally, optical methods are used to derive information on the neutral wave dynamics by obtaining gravity ...
  • Pandey, Kuldeep; Sekar, R.; Anandarao, B. G.; Gupta, S. P.; Chakrabarty, D. (American Geophysical Union, 2018-03)
    Studies made earlier using ground-based observations of geomagnetic field over the Indian longitudes revealed that the occurrence of equatorial counter electrojet (CEJ) events in afternoon hours is more frequent during ...
  • Mishra, Akash; Chakraborty, Sumanta; Ghosh, Avirup; Sarkar, Sudipta (Springer, 2018-09)
    Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter flow into the horizon. Here, we study the ...
  • Sengupta, Anand (IOP Publishing, 2017-12)
    On 2017 August 17 the merger of two compact objects with masses consistent with two neutron stars was discovered through gravitational-wave (GW170817), gamma-ray (GRB 170817A), and optical (SSS17a/AT 2017gfo) observations. ...
  • Kaur, Navpreet; Sameer; Kiran, S. Baliyan; Ganesh, Shashikiran (Oxford University Press Journals, 2017-05)
    We present results based on the observations of the blazar 3C 66A from 2005 November 06 to 2016 February 14 in the BVR and I broad-bands using the 1.2-m telescope of the Mt Abu InfraRed Observatory (MIRO). The source was ...
  • Jamal, M. Yousuf; Mitra, Sukanya; Chandra, Vinod (IOP Publishing, 2019-08)
    The present investigation involves explorations on the chromo-dielectric properties of the hot QCD medium produced in relativistic heavy-ion collisions in terms of refractive index. The isotropic/equilibrium modelling is ...
  • Kaur, Navpreet; Baliyan, Kiran S.; Chandra, S.; Sameer; Ganesh, Shashikiran (American Astronomical Society, 2018-07)
    With an aim to explore optical variability at diverse timescales in BL Lac source S5 0716+714, it was observed for 46 nights during 2013 January 14 to 2015 June 01 when it underwent two major outbursts. The observations ...

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