Browsing Journal Articles by Title

Browsing Journal Articles by Title

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  • 10Be depositional flux variation in the central Indian Ocean during the last 43 ka 
    Jena, Partha Sarathi; Bhushan, Ravi; Ajay, Shivam; Bharti, Nisha; Sudheer, A. K. (Elsevier, 2022-01)
    The advent of Accelerator Mass Spectrometer (AMS) enhanced the application of meteoric 10Be (half-life of 1.39 Ma) as a tracer for understanding earth surface processes on thousand to million-year time scales. However, for ...
  • The 2HDM doppelganger 
    Coleppa, Baradhwaj; Sarkar, Agnivo (SpringerOpen, 2022-06)
    We discuss the structure of a model with anextended gauge symmetry groupSU(2)×SU(2)×U(1)with a correspondingly rich Electroweak Symmetry Break-ing structure. In spite of the additional scalar degrees of free-dom ...
  • 331 models and grand unification: From minimal SU(5) to minimal SU(6) 
    Hati, Chandan; Deppisch, Frank F.; Patra, Sudhanwa; Sarkar, Utpal; Valle, Jose W. F. (Elsevier, 2016-11)
    We consider the possibility of grand unification of the SU(3)c⊗SU(3)L⊗U(1)X model in an SU(6) gauge unification group. Two possibilities arise. Unlike other conventional grand unified theories, in SU(6) one can embed the ...
  • 750 GeV resonance in the dark left-right model 
    Dey, Ujjal Kumar; Mohanty, Subhendra; Tomar, Gaurav (Elsevier, 2016-05)
    We explain the 750 GeV750 GeV diphoton resonance in the context of the dark left-right symmetric model. A global symmetry in this model, stabilizes the dark matter and ensures that the scalar couples dominantly to gluons ...
  • A case of anomalous electric field perturbations in the equatorial ionosphere during postsunset hours: insights 
    Kumar, Ankit; Chakrabarty, Dibyendu; Fejer, B. G.; Reeves, Geoffrey D.; Rout, Diptiranjan; Sripathi, S.; Seemala, Gopi K.; Sunda, Surendra; Yadav, Anil Kumar (Wiley, 2023-02)
    During a weak geomagnetic storm (Ap = 15) on 24 December 2014, the penetration electric field perturbations over the Indian dip equatorial sector are found to be anomalous on a number of occasions during postsunset hours. ...
  • Absence of an effective horizon for black holes in gravity's rainbow 
    Ali, Ahmed Farag; Faizal, Mir; Majumder, Barun (IOP Science, 2015-01)
    We argue that the divergence in time for an asymptotic observer occurs because of specifying the position of the Horizon beyond the Planck scale. In fact, a similar divergence in time will also occur for an in-going observer ...
  • Absorption variability of the highly obscured active galactic nucleus NGC 4507 
    Jana, Arghajit; Ricci, Claudio; Naik, Sachindra; Tanimoto, Atsushi; Kumari, Neeraj; Chang, Hsiang-Kuang; Nandi, Prantik; Chatterjee, Arka; Safi-Harb, Samar (Royal Astronomical Society, 2022-06)
    We present a detailed study of the highly obscured active galaxy NGC 4507, performed using four Nuclear Spectroscopic Telescope Array (NuSTAR) observations carried out between May and August in 2015 (?130 ks in total). ...
  • Acceleration of solar energetic particles by the shock of interplanetary coronal mass ejection 
    Mondal, Shanwlee Sow; Sarkar, Aveek; Vaidya, Bhargav; Mignone, Andrea, (IOP Publishing, 2021-12)
    Interplanetary coronal mass ejection (ICME) shocks are known to accelerate particles and contribute significantly to solar energetic particle events. We have performed magnetohydrodynamic-particle in cell simulations of ...
  • Accretion properties of MAXI J1813-095 during its failed outburst in 2018 
    Jana, Arghajit; Jaisawal, Gaurava K.; Naik, Sachindra; Kumari, Neeraj; Chatterjee, Debjit; Chatterjee, Kaushik; Bhowmick, Riya; Chakrabarti, Sandip K.; Chang, Hsiang-Kuang; Debnath, Dipak (IOP Publishing, 2021-06)
    We present the results obtained from detailed timing and spectral studies of a black hole candidate MAXI J1813-095 using Swift, NICER, and NuSTAR observations during its 2018 outburst. The timing behavior of the source is ...
  • Acoustic radiation from vortex–barrier interaction in atomic Bose–Einstein condensate 
    Suthar, Kuldeep; Roy, Arko; Angom, D. (IOP Science, 2014-06)
    We examine the dynamics of a vortex dipole in the Bose–Einstein condensates of trapped dilute atomic gases at zero temperature in the presence of a Gaussian barrier potential. The density anisotropy induced by the barrier ...
  • Activity of the first interstellar comet 2I/Borisov around perihelion: results from Indian observatories 
    Aravind, K. et al. (Oxford University Press, 2021-02)
    Comet 2I/Borisov is the first true interstellar comet discovered. Here, we present results from observational programs at two Indian observatories, 2 m Himalayan Chandra Telescope at the Indian Astronomical Observatory, ...
  • Advanced LIGO 
    Sengupta, Anand (IOP Science, 2015-03)
    The Advanced LIGO gravitational wave detectors are second-generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA, USA. The two instruments are identical in design, and ...
  • Aerosol characteristics over Indo-Gangetic Plain from ground-based AERONET and MERRA-2/CAMS model simulations 
    Ansari, Kamran; Ramachandran, S. (Elsevier, 2023-01)
    A comprehensive investigation of physical, optical, and chemical characteristics of columnar aerosols over two locations with distinct environmental settings in the Indo-Gangetic Plain (IGP) region, namely, Kanpur (urban ...
  • Air-filled microbubbles based on albumin functionalized with gold nanocages and zinc phthalocyanine for multimodal imaging 
    Maksimova, Elizaveta A.; Barmin, Roman A.; Rudakovskaya, Polina G.; Sindeeva, Olga A.; Prikhozhdenko, Ekaterina S.; Yashchenok, Alexey M.; Khlebtsov, Boris N.; Solovev, Alexander A.; Huang, Gaoshan; Mei, Yongfeng; Dey, Krishna Kanti; Gorin, Dmitry A. (MDPI, 2021-09)
    Microbubbles are intravascular contrast agents clinically used in diagnostic sonography, echocardiography, and radiology imaging applications. However, up to date, the idea of creating microbubbles with multiple functionalities ...
  • Air-sea CO2 exchange rate in the northern Indian ocean based on coral radiocarbon records 
    Raj, Harsh; Bhushan, Ravi; Banerji, Upasana S.; Muruganantham, M.; Shah, Chinmay; Nambiar, Romi; Dabhi, Ankur J. (Elsevier, 2022-02)
    Corals growing in shallow oceanic regions record the radiocarbon variations in ocean surface waters. Tracing bomb radiocarbon in various carbon reservoirs, can help understand the pathways and rates of carbon exchange ...
  • Airy beam optical parametric oscillator 
    Aadhi, A.; Apurv Chaitanya, N.; Jabir, M. V.; Vaity, Pravin; Singh, R. P.; Samanta, Goutam Kumar (Nature publishing group, 2016-05)
    Airy beam, a non-diffracting waveform, has peculiar properties of self-healing and self-acceleration. Due to such unique properties, the Airy beam finds many applications including curved plasma wave-guiding, micro-particle ...
  • All-periodically poled, high-power, continuous-wave, single-frequency tunable UV source 
    Aadhi, A.; Apurv Chaitanya, N.; Jabir, M. V.; Singh, Ravindra P.; Samanta, Goutam Kumar (Optics InfoBase, 2015)
    We report on experimental demonstration of an all-periodically poled, continuous-wave (CW), high-power, single-frequency, ultra-violet (UV) source. Based on internal second-harmonic-generation (SHG) of a CW singly resonant ...
  • All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data 
    Roy, Soumen; Sengupta, Anand S.; et al. (American Physical Society, 2021-10)
    We report on an all-sky search for continuous gravitational waves in the frequency band 20–2000 Hz and with a frequency time derivative in the range of [−1.0,+0.1]×10−8  Hz/s. Such a signal could be produced by a nearby, ...
  • All-sky search for continuous gravitational waves from isolated neutron stars using advanced LIGO and advanced Virgo O3 data 
    Roy, Soumen; Sengupta, Anand S. et al. (American Physical Society, 2022-11)
    We present results of an all-sky search for continuous gravitational waves which can be produced by spinning neutron stars with an asymmetry around their rotation axis, using data from the third observing run of the Advanced ...
  • All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data 
    Sengupta, Anand (American Physical Society, 2019-07)
    We present results of an all-sky search for continuous gravitational waves (CWs), which can be produced by fast spinning neutron stars with an asymmetry around their rotation axis, using data from the second observing run ...

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