2022A&A...662L..10R


Query : 2022A&A...662L..10R

2022A&A...662L..10R - Astronomy and Astrophysics, volume 662, L10-10 (2022/6-1)

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

REGUITTI A., PASTORELLO A., PIGNATA G., FRASER M., STRITZINGER M.D., BRENNAN S.J., CAI Y.-Z., ELIAS-ROSA N., FUGAZZA D., GUTIERREZ C.P., KANKARE E., KOTAK R., LUNDQVIST P., MAZZALI P.A., MORAN S., SALMASO I., TOMASELLA L., VALERIN G. and KUNCARAYAKTI H.

Abstract (from CDS):

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 HeI lines become very strong, with HeIλ5876 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 TypeIbn SNe.

Abstract Copyright: © A. Reguitti et al. 2022

Journal keyword(s): supernovae: general - supernovae: individual: SN 2021foa

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SN 2016jbu SN* 07 36 25.98 -69 32 55.4           SNII 23 0
2 SN 2013gc SN* 08 07 11.88 -28 03 26.3           SNIIn 9 1
3 SN 2015bh SN* 09 09 34.96 +33 07 20.4           SNIIn 55 1
4 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 319 1
5 iPTF 13ajw SN* 10 26 54.55 +19 52 55.2           SNIIn 24 0
6 SN 2005la SN* 12 52 15.68 +27 31 52.5     17.6     SNIbn/IIbn 60 1
7 SN 2011fh SN* 12 56 14.01 -29 29 54.8           SNIIn 11 1
8 SN 2016bdu SN* 13 10 13.950 +32 31 14.07           SNIIn 16 0
9 SN 2021foa SN* 13 17 12.370 -17 15 26.02           SNIIn 3 0
10 IC 863 EmG 13 17 12.4025383728 -17 15 16.053508008   14.24   13.17   ~ 48 0
11 SN 2010mc SN* 17 21 30.68 +48 07 47.4           SNIIn 79 1
12 SN 2009ip s*b 22 23 08.26 -28 56 52.4           LBV 327 0
13 SN 2011hw SN* 22 26 14.54 +34 12 59.1           SNIIn: 50 1
14 SN 1996al SN* 23 33 16.1 -54 05 02     14.0     SNII 33 1

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2023.01.31-08:16:19

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