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Collapsars as Sites of r-process Nucleosynthesis: Systematic Photometric Near-infrared Follow-up of Type Ic-BL Supernovae
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC). Henan Academy of Sciences, Peopleʼs Republic of China.ORCID-id: 0000-0002-2898-6532
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Antal upphovsmän: 442024 (Engelska)Ingår i: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 962, nr 1, artikel-id 68Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

One of the open questions following the discovery of GW170817 is whether neutron star (NS) mergers are the only astrophysical sites capable of producing r-process elements. Simulations have shown that 0.01–0.1 M of r-process material could be generated in the outflows originating from the accretion disk surrounding the rapidly rotating black hole that forms as a remnant to both NS mergers and collapsing massive stars associated with long-duration gamma-ray bursts (collapsars). The hallmark signature of r-process nucleosynthesis in the binary NS merger GW170817 was its long-lasting near-infrared (NIR) emission, thus motivating a systematic photometric study of the light curves of broad-lined stripped-envelope (Ic-BL) supernovae (SNe) associated with collapsars. We present the first systematic study of 25 SNe Ic-BL—including 18 observed with the Zwicky Transient Facility and 7 from the literature—in the optical/NIR bands to determine what quantity of r-process material, if any, is synthesized in these explosions. Using semi-analytic models designed to account for r-process production in SNe Ic-BL, we perform light curve fitting to derive constraints on the r-process mass for these SNe. We also perform independent light curve fits to models without the r-process. We find that the r-process-free models are a better fit to the light curves of the objects in our sample. Thus, we find no compelling evidence of r-process enrichment in any of our objects. Further high-cadence infrared photometric studies and nebular spectroscopic analysis would be sensitive to smaller quantities of r-process ejecta mass or indicate whether all collapsars are completely devoid of r-process nucleosynthesis.

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2024. Vol. 962, nr 1, artikel-id 68
Nationell ämneskategori
Astronomi, astrofysik och kosmologi
Identifikatorer
URN: urn:nbn:se:su:diva-226991DOI: 10.3847/1538-4357/ad11dfISI: 001159107900001Scopus ID: 2-s2.0-85184922589OAI: oai:DiVA.org:su-226991DiVA, id: diva2:1842263
Tillgänglig från: 2024-03-04 Skapad: 2024-03-04 Senast uppdaterad: 2024-03-04Bibliografiskt granskad

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Yang, ShengSollerman, JesperOmand, Conor M. B.Sarin, NikhilSchweyer, Tassilo

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Yang, ShengSollerman, JesperOmand, Conor M. B.Sarin, NikhilSchweyer, Tassilo
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Institutionen för astronomiOskar Klein-centrum för kosmopartikelfysik (OKC)Nordiska institutet för teoretisk fysik (Nordita)Fysikum
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Astrophysical Journal
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