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Probing the Low-mas...
Probing the Low-mass End of Core-collapse Supernovae Using a Sample of Strongly-stripped Calcium-rich Type IIb Supernovae from the Zwicky Transient Facility
- Article/chapterEnglish2023
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LIBRIS-ID:oai:DiVA.org:su-225065
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-225065URI
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https://doi.org/10.3847/1538-4357/acfeebDOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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The fate of stars in the zero-age main-sequence (ZAMS) range ≈8–12 M⊙ is unclear. They could evolve to form white dwarfs or explode as electron-capture supernovae (SNe) or iron core-collapse SNe (CCSNe). Even though the initial mass function indicates that this mass range should account for over 40% of all CCSN progenitors, few have been observationally confirmed, likely due to the faintness and rapid evolution of some of these transients. In this paper, we present a sample of nine Ca-rich/O-poor Type IIb SNe detected by the Zwicky Transient Facility with progenitors likely in this mass range. These sources have a [Ca ii] λλ7291, 7324/[O i] λλ6300, 6364 flux ratio of ≳2 in their nebular spectra. Comparing the measured [O i] luminosity (≲1039 erg s−1) and derived oxygen mass (≈0.01 M⊙) with theoretical models, we infer that the progenitor ZAMS mass for these explosions is less than 12 M⊙. The ejecta properties (Mej ≲ 1 M⊙ and Ekin ∼ 1050 erg) are also consistent. The low ejecta mass of these sources indicates a class of strongly-stripped SNe that is a transition between the regular stripped-envelope SNe and ultra-stripped SNe. The progenitor could be stripped by a main-sequence companion and result in the formation of a neutron star−main sequence binary. Such binaries have been suggested to be progenitors of neutron star−white dwarf systems that could merge within a Hubble time and be detectable with LISA.
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Kasliwal, Mansi M.
(author)
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Fremling, Christoffer
(author)
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Yang, Sheng,1990-Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)yash0613
(author)
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Schulze, Steve,1980-Stockholms universitet,Oskar Klein-centrum för kosmopartikelfysik (OKC),Fysikum(Swepub:su)stsc6413
(author)
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Sollerman, Jesper,1968-Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle
(author)
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Sit, Tawny
(author)
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De, Kishalay
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Tzanidakis, Anastasios
(author)
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Perley, Daniel A.
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Anand, Shreya
(author)
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Andreoni, Igor
(author)
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Barbarino, CristinaStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)cbarb
(author)
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Brudge, K.
(author)
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Drake, Andrew
(author)
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Gal-Yam, Avishay
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Laher, Russ R.
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Karambelkar, Viraj
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Kulkarni, S. R.
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Masci, Frank J.
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Medford, Michael S.
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Polin, Abigail
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Reedy, Harrison
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Riddle, Reed
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Sharma, Yashvi
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Smith, Roger
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Yan, Lin
(author)
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Yang, Yi
(author)
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Yao, Yuhan
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Astrophysical Journal959:10004-637X1538-4357
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Das, Kaustav K.
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Kasliwal, Mansi ...
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Fremling, Christ ...
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Yang, Sheng, 199 ...
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Schulze, Steve, ...
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Sollerman, Jespe ...
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Sit, Tawny
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De, Kishalay
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Tzanidakis, Anas ...
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Perley, Daniel A ...
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Anand, Shreya
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Andreoni, Igor
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Barbarino, Crist ...
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Brudge, K.
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Drake, Andrew
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Gal-Yam, Avishay
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Laher, Russ R.
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Karambelkar, Vir ...
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Kulkarni, S. R.
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Masci, Frank J.
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Medford, Michael ...
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Polin, Abigail
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Reedy, Harrison
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Riddle, Reed
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Sharma, Yashvi
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Smith, Roger
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Yan, Lin
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Yang, Yi
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Yao, Yuhan
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