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SN 2020bvc :
SN 2020bvc : A Broad-line Type Ic Supernova with a Double-peaked Optical Light Curve and a Luminous X-Ray and Radio Counterpart
- Article/chapterEnglish2020
Publisher, publication year, extent ...
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2020-10-14
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American Astronomical Society,2020
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Numbers
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LIBRIS-ID:oai:DiVA.org:su-187660
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-187660URI
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https://doi.org/10.3847/1538-4357/aba630DOI
Supplementary language notes
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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
Notes
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We present optical, radio, and X-ray observations of SN 2020bvc (=ASASSN-20bs, ZTF 20aalxlis), a nearby (z = 0.0252; d.=.114Mpc) broad-line (BL) Type Ic supernova (SN) and the first double-peaked Ic-BL discovered without a gamma-ray burst (GRB) trigger. Our observations show that SN 2020bvc shares several properties in common with the Ic-BL SN 2006aj, which was associated with the low-luminosity gamma-ray burst (LLGRB) 060218. First, the 10 GHz radio luminosity (L-radio approximate to 10(37) erg s(-1)) is brighter than ordinary core-collapse SNe but fainter than LLGRB SNe such as SN 1998bw (associated with LLGRB 980425). We model our VLA observations (spanning 13-43 days) as synchrotron emission from a mildly relativistic (v greater than or similar to 0.3c) forward shock. Second, with Swift and Chandra, we detect X-ray emission (L-X approximate to 10(41) erg s(-1)) that is not naturally explained as inverse Compton emission or part of the same synchrotron spectrum as the radio emission. Third, high-cadence (6x night(-1)) data from the Zwicky Transient Facility (ZTF) show a double-peaked optical light curve, the first peak from shock cooling of extended low-mass material (mass M-e < 10(-2) M-circle dot at radius R-e > 10(12) cm) and the second peak from the radioactive decay of 56Ni. SN 2020bvc is the first double-peaked Ic-BL SN discovered without a GRB trigger, so it is noteworthy that it shows X-ray and radio emission similar to LLGRB SNe. For four of the five other nearby (z less than or similar to 0.05) Ic-BL SNe with ZTF high-cadence data, we rule out a first peak like that seen in SN 2006aj and SN 2020bvc, i.e., that lasts approximate to 1 day.and reaches a peak luminosity M approximate to -18. Follow-up X-ray and radio observations of Ic-BL SNe with well-sampled early optical light curves will establish whether double-peaked optical light curves are indeed predictive of LLGRB-like X-ray and radio emission.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Kulkarni, S. R.
(author)
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Perley, Daniel A.
(author)
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Cenko, S. Bradley
(author)
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Corsi, Alessandra
(author)
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Schulze, Steve
(author)
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Lunnan, RagnhildStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)rlunn
(author)
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Sollerman, JesperStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle
(author)
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Gal-Yam, Avishay
(author)
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Anand, Shreya
(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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Bellm, Eric C.
(author)
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Bruch, Rachel J.
(author)
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Burns, Eric
(author)
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De, Kishalay
(author)
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Dekany, Richard
(author)
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Delacroix, Alexandre
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Duev, Dmitry A.
(author)
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Frederiks, Dmitry D.
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Fremling, Christoffer
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Goldstein, Daniel A.
(author)
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Golkhou, V. Zach
(author)
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Graham, Matthew J.
(author)
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Hale, David
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Kasliwal, Mansi M.
(author)
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Kupfer, Thomas
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Laher, Russ R.
(author)
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Martikainen, Julia
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Masci, Frank J.
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Neill, James D.
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Ridnaia, Anna
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Rusholme, Ben
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Savchenko, Volodymyr
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Shupe, David L.
(author)
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Soumagnac, Maayane T.
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Strotjohann, Nora L.
(author)
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Svinkin, Dmitry S.
(author)
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Taggart, Kirsty
(author)
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Tartaglia, LeonardoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)leta1160
(author)
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Yan, Lin
(author)
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Zolkower, Jeffry
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Astrophysical Journal: American Astronomical Society902:10004-637X1538-4357
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Ho, Anna Y. Q.
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Kulkarni, S. R.
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Perley, Daniel A ...
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Cenko, S. Bradle ...
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Corsi, Alessandr ...
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Schulze, Steve
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Lunnan, Ragnhild
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Sollerman, Jespe ...
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Gal-Yam, Avishay
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Anand, Shreya
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Barbarino, Crist ...
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Bellm, Eric C.
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Bruch, Rachel J.
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Burns, Eric
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De, Kishalay
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Dekany, Richard
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Delacroix, Alexa ...
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Duev, Dmitry A.
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Frederiks, Dmitr ...
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Fremling, Christ ...
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Goldstein, Danie ...
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Golkhou, V. Zach
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Graham, Matthew ...
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Hale, David
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Kasliwal, Mansi ...
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Kupfer, Thomas
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Laher, Russ R.
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Martikainen, Jul ...
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Masci, Frank J.
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Neill, James D.
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Ridnaia, Anna
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Rusholme, Ben
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Savchenko, Volod ...
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Shupe, David L.
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Soumagnac, Maaya ...
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Strotjohann, Nor ...
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Svinkin, Dmitry ...
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Taggart, Kirsty
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Tartaglia, Leona ...
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Yan, Lin
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Zolkower, Jeffry
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