SN 2021foa, a transitional event between a Type IIn (SN 2009ip-like) and a Type Ibn supernova

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dc.contributor.authorReguitti, A.
dc.contributor.authorPastorello, A.
dc.contributor.authorPignata, G.
dc.contributor.authorFraser, M.
dc.contributor.authorStritzinger, M.D.
dc.contributor.authorBrennan, S.J.
dc.contributor.authorCai, Y.-Z.
dc.contributor.authorElias-Rosa, N.
dc.contributor.authorFugazza, D.
dc.contributor.authorGutierrez, C.P.
dc.contributor.authorKankare, E.
dc.contributor.authorKotak, R.
dc.contributor.authorLundqvist, P.
dc.contributor.authorMazzali, P.A.
dc.contributor.authorMoran, S.
dc.contributor.authorSalmaso, I.
dc.contributor.authorTomasella, L.
dc.contributor.authorValerin, G.
dc.contributor.authorKuncarayakti, H.
dc.date.accessioned2024-04-25T17:03:21Z
dc.date.available2024-04-25T17:03:21Z
dc.date.issued2022-06-01
dc.descriptionIndexación: Scopus.
dc.description.abstractWe 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 s1) H emission lines that, two weeks later, reveal a complex profile, with a narrow P Cygni on top of an intermediate-width (∼2700 km s1) component. At +12 days, metal lines in emission appear and Hea lines become very strong, with Hea 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. © A. Reguitti et al. 2022.
dc.description.urihttps://www.aanda.org/articles/aa/full_html/2022/06/aa43340-22/aa43340-22.html
dc.identifier.citationAstronomy and Astrophysics, Volume 662, 1 June 2022, Article number L10
dc.identifier.doi10.1051/0004-6361/202243340
dc.identifier.issn0004-6361
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/56416
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.licenseCC BY 4.0 DEED Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectSupernovae: general
dc.subjectSupernovae: individual: SN 2021foa
dc.subjectLuminance
dc.subjectLight curves
dc.subjectLong lasting
dc.subjectMain event
dc.subjectPhotometric data
dc.subjectShort durations
dc.subjectSpectroscopic data
dc.subjectSupernovae: individual: sn 1987a
dc.subjectTransitional events
dc.titleSN 2021foa, a transitional event between a Type IIn (SN 2009ip-like) and a Type Ibn supernova
dc.typeArtículo
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