Characterizing the Ordinary Broad-line Type Ic SN 2023pel from the Energetic GRB 230812B
| Title: | Characterizing the Ordinary Broad-line Type Ic SN 2023pel from the Energetic GRB 230812B |
|---|---|
| Authors: | Srinivasaragavan, GP; Swain, V; O’Connor, B; Anand, S; Ahumada, T; Perley, D; Stein, R; Sollerman, J; Fremling, C; Cenko, SB; Antier, S; Guessoum, N; Hussenot-Desenonges, T; Hello, P; Lesage, S; Hammerstein, E; Miller, MC; Andreoni, I; Bhalerao, V; Bloom, JS; Dutta, A; Gal-Yam, A; Hinds, KR; Jaodand, A; Kasliwal, M; Kumar, H; Kutyrev, AS; Ragosta, F; Ravi, V; Sharma, K; Singh Teja, R; Yang, S; Anupama, GC; Bellm, EC; Coughlin, MW; Mahabal, AA; Masci, FJ; Pathak, U; Purdum, J; Roberts, OJ; Smith, R; Wold, A |
| Publisher Information: | American Astronomical Society |
| Publication Year: | 2024 |
| Collection: | Liverpool John Moores University: LJMU Research Online |
| Subject Terms: | QB Astronomy; QC Physics |
| Description: | 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 (E γ,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 M r = −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 M Ni = 0.38 ± 0.01 M ⊙ and a peak bolometric luminosity of L bol ∼ 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 v ph = 11,300 ± 1600 km s−1 at that phase. Extrapolating this velocity to the time of maximum light, we derive the ejecta mass M ej = 1.0 ± 0.6 M ⊙ and kinetic energy E KE = 1.3 − 1.2 + 3.3 × 10 51 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 E γ,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. |
| Document Type: | article in journal/newspaper |
| File Description: | text |
| Language: | English |
| ISSN: | 2041-8205 |
| Relation: | https://researchonline.ljmu.ac.uk/id/eprint/22641/1/Characterizing%20the%20Ordinary%20Broadline%20Type%20Ic%20SN%202023pel%20from%20the%20Energetic%20GRB%20230812B.pdf; Srinivasaragavan, GP ORCID logoorcid:0000-0002-6428-2700 , Swain, V ORCID logoorcid:0000-0002-7942-8477 , O’Connor, B ORCID logoorcid:0000-0002-9700-0036 , Anand, S ORCID logoorcid:0000-0003-3768-7515 , Ahumada, T ORCID logoorcid:0000-0002-2184-6430 , Perley, D ORCID logoorcid:0000-0001-8472-1996 , Stein, R ORCID logoorcid:0000-0003-2434-0387 , Sollerman, J ORCID logoorcid:0000-0003-1546-6615 , Fremling, C ORCID logoorcid:0000-0002-4223-103X , Cenko, SB ORCID logoorcid:0000-0003-1673-970X , Antier, S ORCID logoorcid:0000-0002-7686-3334 , Guessoum, N ORCID logoorcid:0000-0003-1585-8205 , Hussenot-Desenonges, T ORCID logoorcid:0009-0009-2434-432X , Hello, P, Lesage, S ORCID logoorcid:0000-0001-8058-9684 , Hammerstein, E ORCID logoorcid:0000-0002-5698-8703 , Miller, MC ORCID logoorcid:0000-0002-2666-728X , Andreoni, I ORCID logoorcid:0000-0002-8977-1498 , Bhalerao, V ORCID logoorcid:0000-0002-6112-7609 , Bloom, JS ORCID logoorcid:0000-0002-7777-216X , Dutta, A ORCID logoorcid:0000-0002-7708-3831 , Gal-Yam, A ORCID logoorcid:0000-0002-3653-5598 , Hinds, KR ORCID logoorcid:0000-0002-0129-806X , Jaodand, A ORCID logoorcid:0000-0002-3850-6651 , Kasliwal, M ORCID logoorcid:0000-0002-5619-4938 , Kumar, H ORCID logoorcid:0000-0003-0871-4641 , Kutyrev, AS ORCID logoorcid:0000-0002-2715-8460 , Ragosta, F ORCID logoorcid:0000-0003-2132-3610 , Ravi, V ORCID logoorcid:0000-0002-7252-5485 , Sharma, K ORCID logoorcid:0000-0002-4477-3625 , Singh Teja, R ORCID logoorcid:0000-0002-0525-0872 , Yang, S ORCID logoorcid:0000-0002-2898-6532 , Anupama, GC ORCID logoorcid:0000-0003-3533-7183 , Bellm, EC ORCID logoorcid:0000-0001-8018-5348 , Coughlin, MW ORCID logoorcid:0000-0002-8262-2924 , Mahabal, AA, Masci, FJ ORCID logoorcid:0000-0002-8532-9395 , Pathak, U ORCID logoorcid:0009-0002-7897-6110 , Purdum, J ORCID logoorcid:0000-0003-1227-3738 , Roberts, OJ ORCID logoorcid:0000-0002-7150-9061 , Smith, R ORCID logoorcid:0000-0001-7062-9726 and Wold, A ORCID logoorcid:0000-0002-9998-6732 (2024) Characterizing the Ordinary Broad-line Type Ic SN 2023pel from the Energetic GRB 230812B. Astrophysical Journal Letters, 960 (2). L18-L18. ISSN 2041-8205 |
| DOI: | 10.3847/2041-8213/ad16e7 |
| Availability: | https://researchonline.ljmu.ac.uk/id/eprint/22641/; https://researchonline.ljmu.ac.uk/id/eprint/22641/1/Characterizing%20the%20Ordinary%20Broadline%20Type%20Ic%20SN%202023pel%20from%20the%20Energetic%20GRB%20230812B.pdf; https://doi.org/10.3847/2041-8213/ad16e7 |
| Rights: | cc_by |
| Accession Number: | edsbas.B9A092D4 |
| Database: | BASE |