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Characterizing the ...
Characterizing the Ordinary Broad-line Type Ic SN 2023pel from the Energetic GRB 230812B
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Srinivasaragavan, Gokul P. (author)
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Swain, Vishwajeet (author)
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O'Connor, Brendan (author)
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Anand, Shreya (author)
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Ahumada, Tomás (author)
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Perley, Daniel (author)
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Stein, Robert (author)
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- Sollerman, Jesper, 1968- (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Fremling, Christoffer (author)
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Cenko, S. Bradley (author)
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Antier, S. (author)
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Guessoum, Nidhal (author)
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Hussenot-Desenonges, Thomas (author)
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Hello, Patrice (author)
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Lesage, Stephen (author)
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Hammerstein, Erica (author)
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Miller, M. Coleman (author)
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Andreoni, Igor (author)
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Bhalerao, Varun (author)
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Bloom, Joshua S. (author)
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Dutta, Anirban (author)
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Gal-Yam, Avishay (author)
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Hinds, K-Ryan (author)
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Jaodand, Amruta (author)
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Kasliwal, Mansi (author)
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Kumar, Harsh (author)
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Kutyrev, Alexander S. (author)
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Ragosta, Fabio (author)
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Ravi, Vikram (author)
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Sharma, Kritti (author)
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Singh Teja, Rishabh (author)
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Yang, Sheng (author)
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Anupama, G. C. (author)
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Bellm, Eric C. (author)
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Coughlin, Michael W. (author)
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Mahabal, Ashish A. (author)
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Masci, Frank J. (author)
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Pathak, Utkarsh (author)
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Purdum, Josiah (author)
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Roberts, Oliver J. (author)
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Smith, Roger (author)
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Wold, Avery (author)
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Astrophysical Journal Letters. - 2041-8205 .- 2041-8213. ; 960:2
- Related links:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
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- We report observations of the optical counterpart of the long gamma-ray burst (GRB) GRB 230812B and its associated supernova (SN) SN 2023pel. The proximity (z = 0.36) and high energy (Eγ,iso ∼ 1053 erg) make it an important event to study as a probe of the connection between massive star core collapse and relativistic jet formation. With a phenomenological power-law model for the optical afterglow, we find a late-time flattening consistent with the presence of an associated SN. SN 2023pel has an absolute peak r-band magnitude of Mr = −19.46 ± 0.18 mag (about as bright as SN 1998bw) and evolves on quicker timescales. Using a radioactive heating model, we derive a nickel mass powering the SN of MNi = 0.38 ± 0.01 M⊙ and a peak bolometric luminosity of Lbol ∼ 1.3 × 1043 erg s−1. We confirm SN 2023pel's classification as a broad-line Type Ic SN with a spectrum taken 15.5 days after its peak in the r band and derive a photospheric expansion velocity of vph = 11,300 ± 1600 km s−1 at that phase. Extrapolating this velocity to the time of maximum light, we derive the ejecta mass Mej = 1.0 ± 0.6 M⊙ and kinetic energy EKE = 1.3 +3.3/-1.2 x 1051 erg. We find that GRB 230812B/SN 2023pel has SN properties that are mostly consistent with the overall GRB-SN population. The lack of correlations found in the GRB-SN population between SN brightness and Eγ,iso for their associated GRBs across a broad range of 7 orders of magnitude provides further evidence that the central engine powering the relativistic ejecta is not coupled to the SN powering mechanism in GRB-SN systems.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Srinivasaragavan ...
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Swain, Vishwajee ...
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O'Connor, Brenda ...
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Anand, Shreya
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Ahumada, Tomás
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Perley, Daniel
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show more...
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Stein, Robert
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Sollerman, Jespe ...
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Fremling, Christ ...
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Cenko, S. Bradle ...
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Antier, S.
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Guessoum, Nidhal
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Hussenot-Desenon ...
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Hello, Patrice
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Lesage, Stephen
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Hammerstein, Eri ...
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Miller, M. Colem ...
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Andreoni, Igor
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Bhalerao, Varun
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Bloom, Joshua S.
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Dutta, Anirban
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Gal-Yam, Avishay
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Hinds, K-Ryan
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Jaodand, Amruta
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Kasliwal, Mansi
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Kumar, Harsh
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Kutyrev, Alexand ...
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Ragosta, Fabio
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Ravi, Vikram
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Sharma, Kritti
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Singh Teja, Rish ...
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Yang, Sheng
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Anupama, G. C.
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Bellm, Eric C.
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Coughlin, Michae ...
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Mahabal, Ashish ...
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Masci, Frank J.
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Pathak, Utkarsh
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Purdum, Josiah
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Roberts, Oliver ...
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Smith, Roger
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Wold, Avery
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Stockholm University