2025A&A...700A.156W

Query : 2025A&A...700A.156W

2025A&A...700A.156W - Astronomy and Astrophysics, volume 700A156 (2025/8-1)

Massive stars exploding in a He-rich circumstellar medium XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc, and 2024aej.

WANG Z.-Y., PASTORELLO A., CAI Y.-Z., FRASER M., REGUITTI A., LIN W.-L., TARTAGLIA L., HOWELL D.A., BENETTI S., CAPPELLARO E., CHEN Z.-H., ELIAS-ROSA N., FARAH J., FIORE A., HIRAMATSU D., KANKARE E., LI Z.-T., LUNDQVIST P., MAZZALI P.A., McCULLY C., MO J., MORAN S., NEWSOME M., PADILLA GONZALEZ E., PELLEGRINO C., PENG Z.-H., SMARTT S.J., SRIVASTAV S., STRITZINGER M.D., TERRERAN G., TOMASELLA L., VALERIN G., WANG G.-J., WANG X.-F., DE BOER T., CHAMBERS K.C., GAO H., GUO F.-Z., GUTIERREZ C.P., KANGAS T., KARAMEHMETOGLU E., LI G.-C., LIN C.-C., LOWE T.B., MA X.-R., MAGNIER E.A., MINGUEZ P., PEI S.-P., REYNOLDS T.M., WAINSCOAT R.J., WANG B., WILLIAMS S., WU C.-Y., YAN S.-Y., ZHANG J.-J., ZHANG X.-H. and ZHU X.-J.

Abstract (from CDS):

We present the photometric and spectroscopic analysis of five Type Ibn supernovae (SNe): SN 2020nxt, SN 2020taz, SN 2021bbv, SN 2023utc, and SN 2024aej. These events share key observational features and belong to a family of objects similar to the prototypical Type Ibn SN 2006jc. The SNe exhibit rise times of approximately 10 days and peak absolute magnitudes ranging from -16.5 to -19 mag. Notably, SN 2023utc is the faintest Type Ibn SN discovered to date, with an exceptionally low r-band absolute magnitude of -16.4 mag. The pseudo-bolometric light curves peak at (1 - 10)×1042 erg s–1, with total radiated energies on the order of (1 - 10)×1048 erg. Spectroscopically, these SNe display a relatively slow spectral evolution. The early spectra are characterised by a hot blue continuum and prominent He I emission lines. The early spectra also show blackbody temperatures exceeding 10 000 K, with a subsequent decline in temperature during later phases. Narrow He I lines, which are indicative of unshocked circumstellar material (CSM), show velocities of approximately 1000 km s–1. The spectra suggest that the progenitors of these SNe underwent significant mass loss prior to the explosion, resulting in a He-rich CSM. Our light curve modelling yielded estimates for the ejecta mass (Mej) in the range 1 - 3 M⊙ with kinetic energies (EKin) of (0.1 - 1)×1050 erg. The inferred CSM mass ranges from 0.2 to 1 M⊙. These findings are consistent with expectations for core collapse events arising from relatively massive envelope-stripped progenitors.

Abstract Copyright: © The Authors 2025

Journal keyword(s): circumstellar matter - supernovae: individual: SN 2020nxt - supernovae: individual: SN 2020taz - supernovae: individual: SN 2021bbv - supernovae: individual: SN 2023utc - supernovae: individual: SN 2024aej

VizieR on-line data: <Available at CDS (J/A+A/700/A156): table1.dat 2020nxt.dat 2020taz.dat 2021bbv.dat 2023utc.dat 2024aej.dat>

Status at CDS : All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 43

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Number of rows : 43
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 OGLE 2014-SN-131 SN* 01 14 00.81 -77 06 16.5           SNIbn 19 0
2 PSO J026.1129+39.0957 G 01 44 27.10058160 +39 05 44.6615520           ~ 1 0
3 SN 2024aej SN* 01 44 27.388 +39 05 47.20           SNIbn 2 0
4 SN 2000er SN* 02 24 32.54 -58 26 18.0     15.1     SNIbn 28 1
5 PSST 15dpn SN* 02 32 59.75 +18 38 07.0           SNIbn 13 0
6 OGLE 2012-SN-6 SN* 03 33 34.79 -74 23 40.1           SNIbn 42 0
7 * 27 Tau SB* 03 49 09.7430578114 +24 03 12.301679809 3.18 3.54 3.63 3.62 3.68 B8III 387 0
8 SN 2019cj SN* 04 56 22.92 -46 02 11.2           ~ 5 0
9 SN 2002bj SN* 05 11 46.41 -15 08 10.8     14.8     SNIIn 86 1
10 SN 2018jmt SN* 06 54 47.10 -59 30 10.8           SNIbn 7 0
11 SN 2015U SN* 07 28 53.87 +33 49 10.6           SNIbn 47 1
12 SN 2010al SN* 08 14 15.91 +18 26 18.2           SNIInpec 77 1
13 SN 2023tsz SN* 08 37 29.530 -00 02 35.74           SNIbn 4 0
14 PS1-12sk SN* 08 44 54.860 +42 58 16.89           SNIbn 40 0
15 SN 2014av SN* 09 00 20.02 +52 29 28.0           SNIb: 26 1
16 SN 2023utc SN* 09 11 59.155 +53 43 02.60           SNIbn 5 0
17 SDSS J091159.17+534304.1 G 09 11 59.17215 +53 43 04.1982           ~ 1 0
18 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 380 1
19 SN 2019wep SN* 11 04 37.033 +45 58 38.95           SNII-pec 13 0
20 SN 2021bbv SN* 11 30 20.830 +08 55 34.68           SNIbn 2 0
21 SDSS J113020.86+085535.0 G 11 30 20.86352 +08 55 35.0682           ~ 1 0
22 SN 2019uo SN* 12 02 36.602 +41 03 41.92           SNIbn 27 0
23 SN 2022ablq SN* 12 13 06.479 +17 05 56.23           SNIbn 7 0
24 SN 2023fyq SN* 12 25 45.874 +12 39 48.87           SNIb-pec 16 0
25 SN 2005la SN* 12 52 15.68 +27 31 52.5     17.6     SNIbn/IIbn 72 1
26 ASASSN -14ms SN* 13 04 08.69 +52 18 46.5           SNIbn 19 0
27 SN 2021foa SN* 13 17 12.370 -17 15 26.02           SNIIn 21 0
28 SN 2005al SN* 13 50 00.329 -30 34 34.21           SNIa 50 1
29 SN 2002ao SN* 14 29 35.74 -00 00 55.8     14.3     SNIb/cpec 56 1
30 SN 2020bqj SN* 15 33 40.48 +34 28 44.3           SNIb 10 0
31 iPTF 13beo SN* 16 12 26.63 +14 19 18.0           SNIbn 30 0
32 SN 2018bcc SN* 16 14 22.650 +35 55 04.48           ~ 16 0
33 SN 2018cow SN* 16 16 00.254 +22 16 05.10           SNIb 305 0
34 ASASSN -15ed SN* 16 48 25.16 +50 59 30.7           SNIbn 32 0
35 SN 1999cq SN* 18 32 07.10 +37 36 44.3     15.8     SNIb/c 59 1
36 SN 2022pda SN* 22 04 13.895 -18 49 40.46           SNIbn 4 0
37 SN 2019kbj SN* 22 11 21.930 +19 37 03.48           SNIbn 9 0
38 SN 2009ip s*b 22 23 08.26 -28 56 52.4           LBV 406 0
39 SN 2020taz SN* 22 26 06.270 +10 33 29.65           SNIbn 2 0
40 2MASX J22260649+1033370 G 22 26 06.49653 +10 33 37.0840           ~ 5 0
41 SN 2011hw SN* 22 26 14.54 +34 12 59.1           SNIIn: 61 1
42 SN 2020nxt SN* 22 37 36.235 +35 00 07.68           SNIbn 12 0
43 2MASX J22373660+3500074 G 22 37 36.60647 +35 00 07.4990           ~ 3 0

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