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Browsing by Author "Aryan, Amar"

Browsing by Author "Aryan, Amar"

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  • Analyses of hydrogen-stripped core–collapse supernovae using MOSFiT and MESA-based tools 
    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 ...
  • Evolution of rotating 25 M Population III star: physical properties and resulting supernovae 
    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 ...
  • The long-active afterglow of GRB 210204A: detection of the most delayed flares in a gamma-ray burst 
    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 ...
  • A nearby long gamma-ray burst from a merger of compact objects 
    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 ...
  • Photometric studies on the host galaxies of gamma-ray bursts using 3.6m Devasthal optical telescope 
    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 ...
  • Prompt Emission and Early Optical Afterglow of Very-high-energy Detected GRB 201015A and GRB 201216C: Onset of the External Forward Shock 
    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 ...
  • Revealing nature of GRB 210205A, ZTF21aaeyldq (AT2021any) and follow-up observations with the 4K 4K CCD imager + 3.6m DOT 
    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 ...
  • SN 2016iyc: a Type IIb supernova arising from a low-mass progenitor 
    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). ...
  • SN 2020ank: a bright and fast-evolving H-deficient superluminous supernova 
    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 ...
  • Tale of GRB 171010A/SN 2017htp and GRB 171205A/SN 2017iuk: Magnetar origin? 
    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 ...
  • Unveiling diverse nature of core collapse supernovae 
    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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