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2024PASP..136i4201B - Publ. Astron. Soc. Pac., 136, part no 9, 4201 (2024/September-0)

Ejecta Masses in Type Ia Supernovae-Implications for the Progenitor and the Explosion Scenario.

BORA Z., KONYVES-TOTH R., VINKO J., BANHIDI D., BIRO I.B., BOSTROEM K.A., BODI A., BURKE J., CSANYI I., CSEH B., FARAH J., FILIPPENKO A.V., HEGEDUS T., HIRAMATSU D., HORTI-DAVID A., HOWELL D.A., JHA S.W., KALUP C., KREZINGER M., KRISKOVICS L., McCULLY C., NEWSOME M., ORDASI A., PADILLA GONZALEZ E., PAL A., PELLEGRINO C., SELI B., SODOR A., SZABO Z.M., SZABO O.N., SZAKATS R., SZALAI T., SZEKELY P., TERRERAN G., VARGA V., VIDA K., WANG X. and WHEELER J.C.

Abstract (from CDS):

The progenitor system(s) as well as the explosion mechanism(s) of thermonuclear (Type Ia) supernovae are long-standing issues in astrophysics. Here we present ejecta masses and other physical parameters for 28 recent Type Ia supernovae inferred from multiband photometric and optical spectroscopic data. Our results confirm that the majority of SNe Ia show observable ejecta masses below the Chandrasekhar-limit (having a mean Mej ≈ 1.1 ± 0.3 M⊙), consistent with the predictions of recent sub-MCh explosion models. They are compatible with models assuming either single- or double-degenerate progenitor configurations. We also recover a sub-sample of supernovae within 1.2 M⊙ < Mej < 1.5 M⊙ that are consistent with near-Chandrasekhar explosions. Taking into account the uncertainties of the inferred ejecta masses, about half of our SNe are compatible with both explosion models. We compare our results with those in previous studies, and discuss the caveats and concerns regarding the applied methodology.

Abstract Copyright: © 2024. The Author(s). Published by IOP Publishing Ltd on behalf of the Astronomical Society of the Pacific (ASP).

Journal keyword(s): Type Ia supernovae - Explosive nucleosynthesis - Radiative transfer

Simbad objects: 59

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