2026ApJ...997..179D

Query : 2026ApJ...997..179D

2026ApJ...997..179D - Astrophys. J., 997, 179 (2026/February-1)

JWST Observations of SN 2023ixf. I. Completing the Early Multiwavelength Picture with Plateau-phase Spectroscopy.

DERKACY J.M., ASHALL C., BARON E., MEDLER K., MERA T., HOEFLICH P., SHAHBANDEH M., BURNS C.R., STRITZINGER M.D., TUCKER M.A., SHAPPEE B.J., AUCHETTL K., ANGUS C.R., DESAI D.D., DO A., HINKLE J.T., HOOGENDAM W.B., HUBER M.E., PAYNE A.V., JONES D.O., SHI J., KONG M.Y., ROMAGNOLI S., SYNCATTO A., MORAN S., FEREIDOUNI E., BROWN P.J., ENGESSER M., FOX O.D., GALBANY L., HSIAO E.Y., DE JAEGER T., KUMAR S., LU J., MATSUURA M., MAZZALI P.A., MORRELL N., PFEFFER C.M., PHILLIPS M.M., REST A., SHIBER S., STROLGER L., SUNTZEFF N.B., TEMIM T., TINYANONT S., WANG Q., WESSON R., PARK S.H. and RHO J.

Abstract (from CDS):

We present and analyze panchromatic (0.35-14 μm) spectroscopy of the Type II supernova 2023ixf, including near- and mid-infrared spectra obtained 33.6 days after explosion during the plateau phase, with the James Webb Space Telescope (JWST). This is the first in a series of papers examining the evolution of SN 2023ixf with JWST during the initial 1000 days after explosion and monitoring the formation and growth of molecules and dust in ejecta and the surrounding environment. The JWST infrared spectra are overwhelmingly dominated by H lines, whose profiles reveal ejecta structures, including flat tops, blue notches, and red shoulders, unseen in the optical spectra. We characterize the nature of these structures, concluding that they likely result from a combination of ejecta geometry, viewing angle, and opacity effects. We find no evidence for the formation of dust precursor molecules such as carbon monoxide (CO), nor do we observe an infrared excess attributable to dust. These observations imply that the detections of molecules and dust in SN 2023ixf at later epochs arise either from freshly synthesized material within the ejecta or circumstellar material at radii not yet heated by the supernova at this epoch.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Core-collapse supernovae - Type II supernovae - Supernovae - James Webb Space Telescope

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

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 - 2026 		#notes
1 SN 2022acko SN* 03 19 38.990 -19 23 42.68           SNIIP 28 0
2 SN 1987A SN* 05 35 27.98840 -69 16 11.1134           SNIIpec 5203 2
3 SN 1995ad SN* 06 01 06.13 -23 40 29.0       15.7   SNII 59 1
4 SN 1999ga SN* 07 36 16.70 -69 33 21.8       18   SNIIL 21 1
5 2MASS J07371703+6535579 HXB 07 37 17.0432126424 +65 35 57.826001220           SNIIP 317 1
6 SN 2010jl SN* 09 42 53.33 +09 29 41.8           SNIIn 350 1
7 SN 2024ggi SN* 11 18 22.087 -32 50 15.27           SNII 50 0
8 SN 1996W SN* 11 59 28.98 -19 15 21.9     16     SNII 40 1
9 SN 2005af SN* 13 04 44.06 -49 33 59.8     12.8     SNIIP 76 1
10 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
11 SN 2023ixf SN* 14 03 38.562 +54 18 41.94           SNII 209 0
12 NGC 5461 HII 14 03 40.96 +54 19 02.4           ~ 195 0
13 SN 2017eaw SN* 20 34 44.238 +60 11 36.00           SNIIP 180 0
14 SN 2004et SN* 20 35 25.33 +60 07 17.7   12.88       SNIIP 547 1

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