Constraining the Single-degenerate Channel of Type Ia Supernovae with Stable Iron-group Elements in SNR 3C 397
| Autor: | Pranav Dave, Rahul Kashyap, Robert Fisher, Chris Byrohl, Francis Timmes, Dean M. Townsley |
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| Rok vydání: | 2017 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Astrophysics::High Energy Astrophysical Phenomena Metallicity FOS: Physical sciences White dwarf Astronomy and Astrophysics Astrophysics Type (model theory) 01 natural sciences Abundance of the chemical elements Supernova Stars Astrophysics - Solar and Stellar Astrophysics 13. Climate action Space and Planetary Science Nucleosynthesis 0103 physical sciences Binary star Astrophysics::Solar and Stellar Astrophysics Astrophysics - High Energy Astrophysical Phenomena 010306 general physics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astrophysical Journal. 841:58 |
| ISSN: | 1538-4357 |
| Popis: | Recent Suzaku X-ray spectra of SNR 3C 397 indicate enhanced stable iron-group element abundances of Ni, Mn, Cr, and Fe. Seeking to address key questions about the progenitor and explosion mechanism of 3C 397, we compute nucleosynthetic yields from a suite of multidimensional hydrodynamics models in the near-Chandrasekhar mass, single-degenerate paradigm for supernova Type Ia. Varying the progenitor white dwarf internal structure, composition, ignition, and explosion mechanism, we find the best match to the observed iron-peak elements of 3C 397 are dense (central density $\ge$ 6$\times$10$^{9}$ g cm$^{-3}$), low-carbon white dwarfs that undergo a weak, centrally-ignited deflagration, followed by a subsequent detonation. The amount of $^{56}$Ni produced is consistent with a normal or bright normal supernova Type Ia. A pure deflagration of a centrally-ignited, low central density ($\simeq$ 2$\times$10$^{9}$ g cm$^{-3}$) progenitor white dwarf, frequently considered in the literature, is also found to produce good agreement with 3C 397 nucleosynthetic yields, but leads to a subluminous SN Ia event, in conflict with X-ray linewidth data. Additionally, in contrast to prior work which suggested a large super-solar metallicity for the white dwarf progenitor for SNR 3C 397, we find satisfactory agreement for solar and sub-solar metallicity progenitors. We discuss a range of implications our results have for the single-degenerate channel. Comment: 22 pages and 8 figures. Accepted for publication in The Astrophysical Journal |
| Databáze: | OpenAIRE |
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