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

Authors :
Bora, Zsófia
Könyves-Tóth, Réka
Vinkó, József
Bánhidi, Dominik
Bíró, Imre Barna
Bostroem, K. Azalee
Bódi, Attila
Burke, Jamison
Csányi, István
Cseh, Borbála
Farah, Joseph
Filippenko, Alexei V.
Hegedűs, Tibor
Hiramatsu, Daichi
Horti-Dávid, Ágoston
Howell, D. Andrew
Jha, Saurabh W.
Kalup, Csilla
Krezinger, Máté
Kriskovics, Levente
McCully, Curtis
Newsome, Megan
Ordasi, András
Gonzalez, Estefania Padilla
Pál, András
Pellegrino, Craig
Seli, Bálint
Sódor, Ádám
Szabó, Zsófia Marianna
Szabó, Norton O.
Szakáts, Róbert
Szalai, Tamás
Székely, Péter
Terreran, Giacomo
Varga, Vázsony
Vida, Krisztián
Wang, Xiaofeng
Wheeler, J. Craig
Publication Year :
2024

Abstract

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 {\it observable} ejecta masses below the Chandrasekhar-limit (having a mean $M_{\rm ej} \approx 1.1 \pm 0.3$ M$_\odot$), consistent with the predictions of recent sub-M$_{\rm Ch}$ 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$_\odot$ $< M_{\rm {ej}} < 1.5$ M$_\odot$ 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.

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2408.11928
Document Type :
Working Paper