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Explosive Nucleosynthesis in Near-Chandrasekhar Mass White Dwarf Models for Type Iax Supernovae: Dependence on Model Parameters

Leung, Shing-Chi and Nomoto, Ken'ichi (2020) Explosive Nucleosynthesis in Near-Chandrasekhar Mass White Dwarf Models for Type Iax Supernovae: Dependence on Model Parameters. Astrophysical Journal, 900 (1). Art. No. 54. ISSN 1538-4357. https://resolver.caltech.edu/CaltechAUTHORS:20200911-133134944

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Abstract

The recently observed diversity of Type Ia supernovae (SNe Ia) has motivated us to conduct the theoretical modeling of SNe Ia for a wide parameter range. In particular, the origin of Type Iax supernovae (SNe Iax) has been obscure. Following our earlier work on the parameter dependence of SN Ia models, we focus on SNe Iax in the present study. For a model of SNe Iax, we adopt the currently leading model of pure turbulent deflagration of near-Chandrasekhar mass C+O white dwarfs (WDs). We carry out two-dimensional hydrodynamical simulations of the propagation of the deflagration wave, which leaves a small WD remnant behind and ejects nucleosynthesis materials. We show how the explosion properties, such as nucleosynthesis and explosion energy, depend on the model parameters, such as central densities and compositions of the WDs (including the hybrid WDs), turbulent flame prescription, and initial flame geometry. We extract the associated observables in our models and compare with the recently discovered low-mass WDs with unusual surface abundance patterns and the abundance patterns of some SN remnants. We provide the nucleosynthesis yield tables for applications to stellar archeology and galactic chemical evolution. Our results are compared with the representative models in the literature.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3847/1538-4357/aba1e3DOIArticle
https://arxiv.org/abs/2007.08466arXivDiscussion Paper
ORCID:
AuthorORCID
Leung, Shing-Chi0000-0002-4972-3803
Nomoto, Ken'ichi0000-0001-9553-0685
Additional Information:© 2020. The American Astronomical Society. Received 2019 September 27; revised 2020 June 30; accepted 2020 June 30; published 2020 August 31. This work has been supported by the World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan, and JSPS KAKENHI grant Nos. JP17K05382 and JP20K04024. S.C.L. also acknowledges support from the funding HST-AR-15021.001-A and 80NSSC18K1017. We thank Francis Xavier Timmes for the open-source subroutines, including the Helmholtz equation of state, seven-isotope network, and torch nuclear reaction network. S.C.L. thanks Friedrich Roepke and Florian Lach for the insightful discussion on the topic of deflagration and flame geometry. We thank Chiaki Kobayashi for the motivation of this project from the galactic chemical evolution perspective. We thank Samuel Jones for useful discussions of nucleosynthesis. We thank Hiroya Yamaguchi for the detailed modeling of the SNR 3C 397.
Group:TAPIR, Walter Burke Institute for Theoretical Physics
Funders:
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)JP17K05382
Japan Society for the Promotion of Science (JSPS)JP20K04024
NASA Hubble FellowshipHST-AR-15021.001-A
NASA80NSSC18K1017
Subject Keywords:Explosive nucleosynthesis ; Type Ia supernovae ; Hydrodynamical simulations ; White dwarf stars ; Supernova remnants
Issue or Number:1
Classification Code:Unified Astronomy Thesaurus concepts: Explosive nucleosynthesis (503); Type Ia supernovae (1728); Hydrodynamical simulations (767); White dwarf stars (1799); Supernova remnants (1667)
Record Number:CaltechAUTHORS:20200911-133134944
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200911-133134944
Official Citation:Shing-Chi Leung and Ken'ichi Nomoto 2020 ApJ 900 54
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105336
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:15 Sep 2020 14:20
Last Modified:15 Sep 2020 14:20

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