2024ApJ...960...88S

Query : 2024ApJ...960...88S

2024ApJ...960...88S - Astrophys. J., 960, 88 (2024/January-1)

Ground-based and JWST Observations of SN 2022pul. I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova.

SIEBERT M.R., KWOK L.A., JOHANSSON J., JHA S.W., BLONDIN S., DESSART L., FOLEY R.J., HILLIER D.J., LARISON C., PAKMOR R., TEMIM T., ANDREWS J.E., AUCHETTL K., BADENES C., BARNA B., BOSTROEM K.A., NEWMAN M.J.B., BRINK T.G., BUSTAMANTE-ROSELL M.J., CAMACHO-NEVES Y., CLOCCHIATTI A., COULTER D.A., DAVIS K.W., DECKERS M., DIMITRIADIS G., DONG Y., FARAH J., FILIPPENKO A.V., FLORS A., FOX O.D., GARNAVICH P., PADILLA GONZALEZ E., GRAUR O., HAMBSCH F.-J., HOSSEINZADEH G., HOWELL D.A., HUGHES J.P., KERZENDORF W.E., LE SAUX X.K., MAEDA K., MAGUIRE K., McCULLY C., MIHALENKO C., NEWSOME M., O'BRIEN J.T., PEARSON J., PELLEGRINO C., PIEREL J.D.R., POLIN A., REST A., ROJAS-BRAVO C., SAND D.J., SCHWAB M., SHAHBANDEH M., SHRESTHA M., SMITH N., STROLGER L.-G., SZALAI T., TAGGART K., TERRERAN G., TERWEL J.H., TINYANONT S., VALENTI S., VINKO J., WHEELER J.C., YANG Y., ZHENG W., ASHALL C., DERKACY J.M., GALBANY L., HOEFLICH P., HSIAO E., DE JAEGER T., LU J., MAUND J., MEDLER K., MORRELL N., SHAPPEE B.J., STRITZINGER M., SUNTZEFF N., TUCKER M. and WANG L.

Abstract (from CDS):

Nebular-phase observations of peculiar Type Ia supernovae (SNe Ia) provide important constraints on progenitor scenarios and explosion dynamics for both these rare SNe and the more common, cosmologically useful SNe Ia. We present observations from an extensive ground- and space-based follow-up campaign to characterize SN 2022pul, a super-Chandrasekhar mass SN Ia (alternatively “03fg-like” SN), from before peak brightness to well into the nebular phase across optical to mid-infrared (MIR) wavelengths. The early rise of the light curve is atypical, exhibiting two distinct components, consistent with SN Ia ejecta interacting with dense carbon-oxygen (C/O)-rich circumstellar material (CSM). In the optical, SN 2022pul is most similar to SN 2012dn, having a low estimated peak luminosity (MB = -18.9 mag) and high photospheric velocity relative to other 03fg-like SNe. In the nebular phase, SN 2022pul adds to the increasing diversity of the 03fg-like subclass. From 168 to 336 days after peak B-band brightness, SN 2022pul exhibits asymmetric and narrow emission from [O I] λλ6300, 6364 (FWHM ≈ 2000 km s–1), strong, broad emission from [Ca II] λλ7291, 7323 (FWHM ≈ 7300 km s–1), and a rapid Fe III to Fe II ionization change. Finally, we present the first ever optical-to-MIR nebular spectrum of an 03fg-like SN Ia using data from JWST. In the MIR, strong lines of neon and argon, weak emission from stable nickel, and strong thermal dust emission (with T ≈ 500 K), combined with prominent [O I] in the optical, suggest that SN 2022pul was produced by a white dwarf merger within C/O-rich CSM.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Supernovae - Observational astronomy - White dwarf stars - Type Ia supernovae

Status at CDS : Associated data (images, light curves, etc...) being ingested in VizieR.

Simbad objects: 24

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Number of rows : 24
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 SN 2007if SN* 01 10 51.37 +15 27 39.9   23.3 19.5     SNIap 142 1
2 SN 2021zny SN* 02 03 35.800 +15 44 33.36           SNIa 22 0
3 SN 2010lp SN* 02 54 03.50 +02 57 43.4           SNIapec 44 1
4 ASASSN -15pz SN* 03 08 48.443 -35 13 50.89           SNIa 27 0
5 SN 2021aefx SN* 04 19 53.380 -54 56 53.24           SNIa 48 0
6 SN 2012hn SN* 06 42 42.55 -27 26 49.8           SNIcPec 48 1
7 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 380 1
8 SN 2014J SN* 09 55 42.12 +69 40 25.9           SNIa-norm 456 1
9 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 731 0
10 SN 2020hvf SN* 11 21 26.450 +03 00 52.85           SNIa 38 0
11 SN 2007aa SN* 12 00 27.69 -01 04 51.6 16.9 16.4 5.8     SNIIP 78 1
12 SN 2014dt SN* 12 21 57.6 +04 28 18           SNIax 68 1
13 NGC 4415 GiG 12 26 40.4842511880 +08 26 08.595255480   14.2       ~ 120 0
14 SN 2022pul SN* 12 26 48.846 +08 26 55.32           SNIa 21 0
15 SN 2019yvq SN* 12 27 21.850 +64 47 59.82           SNIa 49 0
16 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
17 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
18 ASASSN -14bd SN* 12 52 44.8 +26 28 13           SNIa 102 0
19 SN 2011fe SN* 14 03 05.711 +54 16 25.22   10.12 10.06     SNIa-norm 747 1
20 SN 2020esm SN* 14 07 18.271 -05 07 37.32           SNIa 16 0
21 SN 2003fg SN* 14 16 18.924 +52 14 53.68           SNIa 141 1
22 SN 2009dc SN* 15 51 12.12 +25 42 28.0           SNIa-norm 188 1
23 ASASSN -15hy SN* 20 10 02.4 -00 44 21           SNIa-norm 33 0
24 SN 2012dn SN* 20 23 36.26 -28 16 43.4           SNIa-norm 64 2

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