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Browsing Aryabhatta Research Institute of Observational Sciences by Author "Aryan, Amar"

Browsing Aryabhatta Research Institute of Observational Sciences by Author "Aryan, Amar"

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  • Aryan, Amar; Pandey, Shashi Bhushan; Kumar, Amit; Gupta, Rahul; Ror, Amit Kumar; Tripathi, Apara; Tiwari, S.N. (Journal Astrophysical Astronomy, 2022-12)
    In this work, we employ two publicly available analysis tools to study four hydrogen (H)–stripped core–collapse supernovae (CCSNe), namely, SN 2009jf, iPTF13bvn, SN 2015ap and SN 2016bau. We use the modular open-source ...
  • Aryan, Amar; Pandey, Shashi Bhushan; Gupta, Rahul; Ror, Amit Kumar (Monthly Notices of the Royal Astronomical Society Letters, 2023-05)
    In this letter, we report the outcomes of 1D modelling of a rotating 25 M zero-age main sequence Population III (Pop III) star up to the stage of the onset of core collapse. Rapidly rotating models display violent and ...
  • Kumar, Harsh, et.al.; Gupta, Rahul; Aryan, Amar; Dimple; Ghosh, Ankur; Kumar, Amit; Mishra, Kuntal; Pandey, Shashi Bhushan; Ror, Amit Kumar (Monthly Notices of the Royal Astronomical Society, 2022-06)
    We present results from extensive broadband follow-up of GRB 210204A over the period of 30 d. We detect optical flares in the afterglow at 7.6 × 105 s and 1.1 × 106 s after the burst: the most delayed flaring ever detected ...
  • Troja, E. ,et.al.; Kumar, A.; Gupta, R.; Aryan, Amar; Misra, Kuntal; Pandey, Shashi Bhushan (Nature, 2022-12)
    Gamma-ray bursts (GRBs) are flashes of high-energy radiation arising from energetic cosmic explosions. Bursts of long (greater than two seconds) duration are produced by the core-collapse of massive stars1, and those of ...
  • Gupta, Rahul; Pandey, Shashi Bhushan; Kumar, Amit; Ror, Amit Kumar; Aryan, Amar; Shrama, Saurabh; Misra, Kuntal; Castro- Tirado, A. J.; Tiwari, S.N. (Journal Astrophysical Astronomy, 2022-12)
    In this paper, we present multi-band photometric observations and analysis of the host galaxies for a sample of five interesting gamma-ray bursts (GRBs) observed using the 3.6m Devasthal optical telescope (DOT) and the ...
  • Ror, Amit Kumar; Gupta, Rahul ,et.al.; Pandey, Shashi Bhushan; Kumar, Amit; Aryan, Amar (The Astrophysical Journal, 2023-01)
    We present a detailed prompt emission and early optical afterglow analysis of the two very-high-energy (VHE) detected bursts GRB 201015A and GRB 201216C, and their comparison with a subset of similar bursts. Time resolved ...
  • Gupta, Rahul; Kumar, Amit; Pandey, Shashi Bhushan, et.al.; Ghosh, Ankur; Dimple; Misra, Kuntal; Kumar, Brajesh; Aryan, Amar (Journal Astrophysical Astronomy, 2022-06)
    Optical follow-up observations of optical afterglows of gamma-ray bursts are crucial to probe the geometry of outflows, emission mechanisms, energetics and burst environments. We performed the follow-up observations of ...
  • Aryan, Amar; Pandey, S. B. ,et.al.; Kumar, Amit; Gupta, Rahul; Ror, Amit Kumar (Monthly Notices of the Royal Astronomical Society, 2022-12)
    In this work, photometric and spectroscopic analyses of a very low-luminosity Type IIb supernova (SN) 2016iyc have been performed. SN 2016iyc lies near the faint end among the distribution of similar supernovae (SNe). ...
  • Kumar, Amit; Kumar, Brajesh; Pandey, S. B.; Sahu, D. K.; Singh, Avinash; Anupama, G.C.; Aryan, Amar; Gupta, Rahul; Dutta, Anirban; Misra, Kuntal (Oup, 2021-09)
    We investigate the observational properties of a hydrogen-deficient superluminous supernova (SLSN) SN 2020ank (at z = 0.2485), with the help of early phase observations carried out between –21 and +52 d since g-band ...
  • Kumar, Amit; Pandey, Shashi B.; Gupta, Rahul; Aryan, Amar; Ror, Amit Kumar; Sharma, Saurabh; Brahme, Nameeta (New Astronomy, 2022-11)
    We present late-time optical follow-up observations of GRB 171010A/SN 2017htp (𝑧 = 0.33) and low luminosity GRB 171205A/SN 2017iuk (𝑧 = 0.037) acquired using the 4K×4K CCD Imager mounted at the 3.6 m Devasthal Optical ...
  • Aryan, Amar (ARIES, Nainital, 2023-12)
    Core-collapse supernovae (CCSNe) are catastrophic astrophysical phenomena that occur during the last evolutionary stages of massive stars having initial masses ≳ 8 M⊙. These catastrophic events play a pivotal role in ...

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