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SN 2019zrk, a brigh...
SN 2019zrk, a bright SN 2009ip analog with a precursor
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- Fransson, Claes (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Sollerman, Jesper, 1968- (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Strotjohann, Nora L. (author)
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- Yang, Sheng (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Schulze, Steve (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Barbarino, Cristina (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Kool, Erik C. (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Ofek, Eran O. (author)
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Crellin-Quick, Arien (author)
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De, Kishalay (author)
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Drake, Andrew J. (author)
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Fremling, Christoffer (author)
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Gal-Yam, Avishay (author)
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Ho, Anna Y. Q. (author)
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Kasliwal, Mansi M. (author)
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(creator_code:org_t)
- 2022-10-07
- 2022
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 666
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- We present photometric and spectroscopic observations of the Type IIn supernova SN 2019zrk (also known as ZTF 20aacbyec). The SN shows a > 100 day precursor, with a slow rise, followed by a rapid rise to M ≈ −19.2 in the r and g bands. The post-peak light-curve decline is well fit with an exponential decay with a timescale of ∼39 days, but it shows prominent undulations, with an amplitude of ∼1 mag. Both the light curve and spectra are dominated by an interaction with a dense circumstellar medium (CSM), probably from previous mass ejections. The spectra evolve from a scattering-dominated Type IIn spectrum to a spectrum with strong P-Cygni absorptions. The expansion velocity is high, ∼16 000 km s−1, even in the last spectra. The last spectrum ∼110 days after the main eruption reveals no evidence for advanced nucleosynthesis. From analysis of the spectra and light curves, we estimate the mass-loss rate to be ∼4 × 10−2 M⊙ yr−1 for a CSM velocity of 100 km s−1, and a CSM mass of 1 M⊙. We find strong similarities for both the precursor, general light curve, and spectral evolution with SN 2009ip and similar SNe, although SN 2019zrk displays a brighter peak magnitude. Different scenarios for the nature of the 09ip-class of SNe, based on pulsational pair instability eruptions, wave heating, and mergers, are discussed.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- supernovae: general
- supernovae: individual: ZTF20aacbyec
- SN 2019zrk
- SN 2009ip
- circumstellar matter
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Fransson, Claes
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Sollerman, Jespe ...
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Strotjohann, Nor ...
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Yang, Sheng
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Schulze, Steve
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Barbarino, Crist ...
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show more...
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Kool, Erik C.
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Ofek, Eran O.
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Crellin-Quick, A ...
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De, Kishalay
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Drake, Andrew J.
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Fremling, Christ ...
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Gal-Yam, Avishay
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Ho, Anna Y. Q.
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Kasliwal, Mansi ...
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astronomy and As ...
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Stockholm University