Browsing Journal Articles by Title

Browsing Journal Articles by Title

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  • Sengupta, Anand (IOP Publishing, 2017-10)
    On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi ...
  • Sharma, Varun; Kumar, S. Chaitanya; Samanta, G. K.; Ebrahim-Zadeh, M. (Optical Society of America, 2020-07)
    Structured beams, conventionally generated through the spatial mode conversion of the Gaussian laser beams, have attracted great interest in recent years. Optical parametric oscillators (OPOs) have demonstrated the potential ...
  • Kaur, Navpreet; Baliyan, Kiran S.; Chandra, Sunil; Sameer; Ganesh, Shashikiran (The Korean Space Science Society, 2016)
    Active galactic nuclei (AGN) are too compact to be resolved by any existing optical telescope facility, making it difficult to understand their structure and the emission processes responsible for their huge energy output. ...
  • Sengupta, Anand; (American Physical Society, 2014-11)
    We report the results of a multimessenger search for coincident signals from the LIGO and Virgo gravitational-wave observatories and the partially completed IceCube high-energy neutrino detector, including periods of joint ...
  • Kaur, Navpreet (EDP sciences, 2017-07)
    Context. PKS 1510−089 is one of only a few flat spectrum radio quasars detected in the very-high-energy (VHE, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and temporal properties of the PKS 1510−089 ...
  • Kaur, Navpreet; Chandra, Sunil; Baliyan, Kiran S.; Sameer; Ganesh, Shashikiran (American Astronomical Society, 2017-09)
    We present the results from a multiwavelength study of the flaring activity in the high-energy peaked BL Lac object 1ES 1959+650 during 2015 January–2016 June. The source underwent two major outbursts, during 2015 March ...
  • Tomar, Gaurav; Mohanty, Subhendra (Springer, 2014-11)
    We studied an extension of the standard model with a fourth generation of fermions to explain the discrepancy in the muon (g −2) and explain the positron excess seen in the AMS-02 experiment. We introduce a gauged SU(2)HV ...
  • 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 ...
  • Biswas, Ayan; Mclver, J.; Mahabal, A. (IOP Publishing, 2020-08)
    A network of three or more gravitational wave detectors simultaneously taking data is required to generate a well-localized sky map for gravitational wave sources, such as GW170817. Local seismic disturbances often cause ...
  • 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 ...

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