2024ApJ...960...29P

Query : 2024ApJ...960...29P

2024ApJ...960...29P - Astrophys. J., 960, 29 (2024/January-1)

Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq.

PEARSON J., SAND D.J., LUNDQVIST P., GALBANY L., ANDREWS J.E., BOSTROEM K.A., DONG Y., HOANG E., HOSSEINZADEH G., JANZEN D., JENCSON J.E., LUNDQUIST M.J., MEHTA D., MEZA RETAMAL N., SHRESTHA M., VALENTI S., WYATT S., ANDERSON J.P., ASHALL C., AUCHETTL K., BARON E., BLONDIN S., BURNS C.R., CAI Y., CHEN T.-W., CHOMIUK L., COULTER D.A., CROSS D., DAVIS K.W., DE JAEGER T., DERKACY J.M., DESAI D.D., DIMITRIADIS G., DO A., FARAH J.R., FOLEY R.J., GROMADZKI M., GUTIERREZ C.P., HAISLIP J., GONZALEZ HERNANDEZ J.I., HINKLE J.T., HOOGENDAM W.B., HOWELL D.A., HOEFLICH P., HSIAO E., HUBER M.E., JHA S.W., JIMENEZ PALAU C., KILPATRICK C.D., KOUPRIANOV V., KUMAR S., KWOK L.A., LARISON C., LEBARON N., LE SAUX X., LU J., McCULLY C., MERA EVANS T., MILNE P., MODJAZ M., MORRELL N., MULLER-BRAVO T.E., NEWSOME M., NICHOLL M., PADILLA GONZALEZ E., PAYNE A.V., PELLEGRINO C., PHAN K., PINEDA-GARCIA J., PIRO A.L., PISCARRETA L., POLIN A., REICHART D.E., ROJAS-BRAVO C., RYDER S.D., SALMASO I., SCHWAB M., SHAHBANDEH M., SHAPPEE B.J., SIEBERT M.R., SMITH N., STRADER J., TAGGART K., TERRERAN G., TINYANONT S., TUCKER M.A., VALERIN G. and YOUNG D.R.

Abstract (from CDS):

We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an underluminous fast-declining Type Ia supernova (SN Ia) in NGC 1784 (D ≈ 31 Mpc), from <1 to 180 days after explosion. The high-cadence observations of SN 2022xkq, a photometrically transitional and spectroscopically 91bg-like SN Ia, cover the first days and weeks following explosion, which are critical to distinguishing between explosion scenarios. The early light curve of SN 2022xkq has a red early color and exhibits a flux excess that is more prominent in redder bands; this is the first time such a feature has been seen in a transitional/91bg-like SN Ia. We also present 92 optical and 19 near-infrared (NIR) spectra, beginning 0.4 days after explosion in the optical and 2.6 days after explosion in the NIR. SN 2022xkq exhibits a long-lived C I 1.0693 μm feature that persists until 5 days post-maximum. We also detect C IIλ6580 in the pre-maximum optical spectra. These lines are evidence for unburnt carbon that is difficult to reconcile with the double detonation of a sub-Chandrasekhar mass white dwarf. No existing explosion model can fully explain the photometric and spectroscopic data set of SN 2022xkq, but the considerable breadth of the observations is ideal for furthering our understanding of the processes that produce faint SNe Ia.

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

Journal keyword(s): Supernovae - 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 iPTF 13ebh SN* 02 21 59.98 +33 16 13.7           SNIa 58 0
2 SN 2003gs SN* 02 27 38.36 -01 09 35.4     14.0     SNIap 63 1
3 SN 2021aefx SN* 04 19 53.380 -54 56 53.24           SNIa 48 0
4 SN 2022xkq SN* 05 05 23.710 -11 52 56.10           SNI/Ic 9 0
5 NGC 1784 Sy2 05 05 27.118 -11 52 17.12   11.4   10.92 11.5 ~ 123 0
6 QSO B0514-1606 Bla 05 16 15.9294202416 -16 03 07.635180816   17.46 16.95     ~ 74 1
7 SN 2018gv SN* 08 05 34.6 -11 26 16           SNIa-norm 47 0
8 ICRF J082526.8-501038 QSO 08 25 26.8673494560 -50 10 38.484054768   20.94       ~ 139 1
9 SN 2018oh SN* 09 06 39.6 +19 20 18           SNIa-norm 91 0
10 SN 1999by SN* 09 21 52.07 +51 00 06.6   13.66       SNIap 307 1
11 NGC 2841 LIN 09 22 02.6778711696 +50 58 35.737082868 10.43 10.09 9.22     ~ 1113 1
12 SN 2012ij SN* 11 40 15.8 +17 27 22           SNIa-91bg 22 1
13 SN 2018aoz SN* 11 51 01.9 -28 44 39           SNIa-norm 40 0
14 SN 2016jhr SN* 12 18 19.850 +00 15 17.38           SNIa 41 0
15 SN 2018byg SN* 12 23 21.57 +46 36 08.3           SNIa-pec 33 0
16 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 612 1
17 SN 2019yvq SN* 12 27 21.850 +64 47 59.82           SNIa 49 0
18 SN 1986G SN* 13 25 36.46 -43 01 53.6   12.45 11.44     SNIapec 422 1
19 SN 2011fe SN* 14 03 05.711 +54 16 25.22   10.12 10.06     SNIa-norm 747 1
20 SN 2017cbv SN* 14 32 34.420 -44 08 02.74           SNIa 146 0
21 SN 2022joj SN* 14 41 40.057 +03 00 24.33           SNIa 6 0
22 SN 2018cny SN* 15 04 16.600 +35 48 54.11           SNIa 12 0
23 SN 2015bp SN* 15 05 28.1 +01 38 06           SNIa-norm 39 0
24 SN 2018eps SN* 16 20 43.180 +65 38 20.96           SNIa 8 0

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