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  • Ho, Anna Y. Q. (author)

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 ...

  • 2020-10-14
  • American Astronomical Society,2020
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-187660
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-187660URI
  • https://doi.org/10.3847/1538-4357/aba630DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • 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 ...)

  • Kulkarni, S. R. (author)
  • Perley, Daniel A. (author)
  • Cenko, S. Bradley (author)
  • Corsi, Alessandra (author)
  • Schulze, Steve (author)
  • Lunnan, RagnhildStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)rlunn (author)
  • Sollerman, JesperStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle (author)
  • Gal-Yam, Avishay (author)
  • Anand, Shreya (author)
  • Barbarino, CristinaStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)cbarb (author)
  • Bellm, Eric C. (author)
  • Bruch, Rachel J. (author)
  • Burns, Eric (author)
  • De, Kishalay (author)
  • Dekany, Richard (author)
  • Delacroix, Alexandre (author)
  • Duev, Dmitry A. (author)
  • Frederiks, Dmitry D. (author)
  • Fremling, Christoffer (author)
  • Goldstein, Daniel A. (author)
  • Golkhou, V. Zach (author)
  • Graham, Matthew J. (author)
  • Hale, David (author)
  • Kasliwal, Mansi M. (author)
  • Kupfer, Thomas (author)
  • Laher, Russ R. (author)
  • Martikainen, Julia (author)
  • Masci, Frank J. (author)
  • Neill, James D. (author)
  • Ridnaia, Anna (author)
  • Rusholme, Ben (author)
  • Savchenko, Volodymyr (author)
  • Shupe, David L. (author)
  • Soumagnac, Maayane T. (author)
  • Strotjohann, Nora L. (author)
  • Svinkin, Dmitry S. (author)
  • Taggart, Kirsty (author)
  • Tartaglia, LeonardoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)leta1160 (author)
  • Yan, Lin (author)
  • Zolkower, Jeffry (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Astrophysical Journal: American Astronomical Society902:10004-637X1538-4357

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