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SN 2021foa, a trans...
SN 2021foa, a transitional event between a Type IIn (SN 2009ip-like) and a Type Ibn supernova
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Reguitti, A. (author)
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Pastorello, A. (author)
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Pignata, G. (author)
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Fraser, M. (author)
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Stritzinger, M. D. (author)
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Brennan, S. J. (author)
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Cai, Y-Z (author)
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Elias-Rosa, N. (author)
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Fugazza, D. (author)
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Gutierrez, C. P. (author)
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Kankare, E. (author)
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Kotak, R. (author)
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- Lundqvist, Peter (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Mazzali, P. A. (author)
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Moran, S. (author)
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Salmaso, I. (author)
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Tomasella, L. (author)
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Valerin, G. (author)
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Kuncarayakti, H. (author)
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(creator_code:org_t)
- 2022-06-28
- 2022
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 662
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We present photometric and spectroscopic data of the unusual interacting supernova (SN) 2021foa. It rose to an absolute magnitude peak of Mr = −18 mag in 20 days. The initial light curve decline shows some luminosity fluctuations before a long-lasting flattening. A faint source (Mr ∼ −14 mag) was detected in the weeks preceding the main event, showing a slowly rising luminosity trend. The r-band absolute light curve is very similar to those of SN 2009ip-like events, with a faint and shorter duration brightening (‘Event A’) followed by a much brighter peak (‘Event B’). The early spectra of SN 2021foa show a blue continuum with narrow (∼400 km s−1) H emission lines that, two weeks later, reveal a complex profile, with a narrow P Cygni on top of an intermediate-width (∼2700 km s−1) component. At +12 days, metal lines in emission appear and He I lines become very strong, with He I λ5876 reaching half of the Hα luminosity, much higher than in previous SN 2009ip-like objects. We propose that SN 2021foa is a transitional event between the H-rich SN 2009ip-like SNe and the He-rich Type Ibn SNe.
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
- SN 2021foa
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Reguitti, A.
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Pastorello, A.
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Pignata, G.
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Fraser, M.
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Stritzinger, M. ...
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Brennan, S. J.
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show more...
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Cai, Y-Z
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Elias-Rosa, N.
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Fugazza, D.
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Gutierrez, C. P.
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Kankare, E.
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Kotak, R.
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Lundqvist, Peter
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Mazzali, P. A.
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Moran, S.
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Salmaso, I.
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Tomasella, L.
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Valerin, G.
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Kuncarayakti, H.
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show less...
- About the subject
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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