2026ApJ...999..227S

Query : 2026ApJ...999..227S

2026ApJ...999..227S - Astrophys. J., 999, 227 (2026/March-2)

Photometry and Spectroscopy of SN 2024pxl: A Luminosity Link among Type Iax Supernovae.

SINGH M., KWOK L.A., JHA S.W., DASTIDAR R., LARISON C., FILIPPENKO A.V., ANDREWS J.E., ANDREWS M., ANUPAMA G.C., ARUNACHALAM P., AUCHETTL K., BANHIDI D., BARNA B., BOSTROEM K.A., BRINK T.G., CARTIER R., CHEN P., CHRISTY C.T., COULTER D.A., COVARRUBIAS S., DAVIS K.W., DICKINSON C.B., DONG Y., FARAH J., FLORS A., FOLEY R.J., FRANZ N., FREMLING C., GALBANY L., GANGOPADHYAY A., GARG A., GATES E.L., GRAUR O., GORDON A.C., HIRAMATSU D., HOANG E., HOWELL D.A., HSU B., JOHANSSON J., JOSHI A., KAHINGA L.A., KAUR R., KUMAR S., KUMNURDMANEE P., KUNCARAYAKTI H., LEBARON N., LIDMAN C., LIU C., MAEDA K., MAGUIRE K., MARTIN B., McCULLY C., MEHTA D., MENOTTI L.M., METEVIER A.J., MILLER A.A., MISRA K., MURPHEY C.T., NEWSOME M., PADILLA GONZALEZ E., PATRA K.C., PEARSON J., PIRO A.L., POLIN A., RAVI A.P., REST A., REHEMTULLA N., MEZA RETAMAL N., ROBINSON O.M., ROJAS-BRAVO C., SAHU D.K., SAND D.J., SCHMIDT B.P., SCHULZE S., SCHWAB M., SHRESTHA M., SIEBERT M.R., SIMHA S., SMITH N., SOLLERMAN J., SRIVASTAV S., SUBRAYAN B.M., SZALAI T., TAGGART K., TEJA R.S., TERWEL J.H., TINYANONT S., VALENTI S., VINKO J., WESTERLING A.L., WHEELER J.C., YANG Y. and ZHENG W.

Abstract (from CDS):

We present extensive ultraviolet to optical photometric and optical to near-infrared (NIR) spectroscopic follow-up observations of the nearby intermediate-luminosity (MV = -16.81 ± 0.19 mag) Type Iax supernovae (SNe Iax) 2024pxl in NGC 6384. SN 2024pxl exhibits a faster light curve than the high-luminosity members of this class, and slower than low-luminosity events. The observationally well-constrained rise time of ∼11 days and an estimated synthesized 56Ni mass of 0.03 M⊙, based on analytical modeling of the integrated spectral energy distribution light curve, are consistent with models of the weak deflagration of a carbon-oxygen white dwarf. Our optical spectral sequence of SN 2024pxl shows weak Si II lines and spectral evolution similar to other high-luminosity SNe Iax, but also a prominent early-time C II line, like lower-luminosity SNe Iax. The late-time optical spectrum of SN 2024pxl closely matches that of SN 2014dt, and its NIR spectral evolution aligns with that of other well-studied, high-luminosity SNe Iax. The spectral-line expansion velocities of SN 2024pxl are at the lower end of the SNe Iax velocity distribution, and the velocity distribution of iron-group elements compared to intermediate-mass elements suggests that the ejecta are mixed on large scales, as expected in pure deflagration models. SN 2024pxl exhibits characteristics intermediate between those of high-luminosity and low-luminosity SNe Iax, further establishing a link across this diverse class.

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

Journal keyword(s): Supernovae - Type Ia supernovae

Status at CDS : Large table(s) will be appraised for possible ingestion 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 2005hk SN* 00 27 50.89 -01 11 53.3   15.92       SNIax 240 1
2 SN 2020sck SN* 01 10 34.841 +02 06 50.15           SNIax 11 0
3 SN 2020udy SN* 02 06 49.350 +44 35 15.29           SN.Iax[02cx-like] 10 0
4 SN 2019muj SN* 02 26 18.472 -09 50 09.92           SNIax 23 0
5 SN 2012Z SN* 03 22 05.39641 -15 23 14.9390           SNIax 142 1
6 NGC 1309 GiG 03 22 06.5548977432 -15 23 59.791692912   12.08   12.5 11.7 ~ 246 1
7 SN 2008ge SN* 04 08 24.68 -47 53 47.4           SNIapec 63 1
8 SN 2011ay SN* 07 02 34.1 +50 35 25           SNIax 51 1
9 SN 2010ae SN* 07 15 54.65 -57 20 36.9           SNIax 68 1
10 SN 2025qe SN* 09 18 28.190 +73 45 44.89           SNIax 1 0
11 SN 2022xlp SN* 11 52 49.577 +44 06 03.51           SNIax[02cx-like] 4 0
12 SN 2014dt SN* 12 21 57.6 +04 28 18           SNIax 68 1
13 SN 2022eyw SN* 12 43 59.970 +62 19 48.29           SNIax 5 0
14 SN 2020kyg SN* 13 11 39.603 +22 54 55.85           SNIa 13 0
15 SN 2002cx SN* 13 13 49.72 +06 57 31.9   17.68       SNIapec 240 1
16 SN 2019gsc SN* 14 37 45.204 +52 43 36.31           SNIax 22 0
17 SN 2018cni SN* 15 01 22.8 -10 10 50           SNIax 8 0
18 SN 2020rea SN* 16 59 37.821 +56 04 08.48           SNIa-x 8 0
19 NGC 6384 AG? 17 32 24.2848390896 +07 03 37.531624968   13.2       ~ 313 0
20 SN 2017drh SN* 17 32 26.2 +07 03 48           SNIa-norm 24 0
21 SN 2024pxl SN* 17 32 27.350 +07 03 44.68           SNIax 5 0
22 SN 2024vjm SN* 19 09 25.780 -63 50 01.75           SNIax 4 0
23 SN 2014ck SN* 22 45 38.9 +73 09 43           SNIax 33 1
24 SN 2008ha SN* 23 34 52.69 +18 13 35.4           SNIax 203 1

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