The Interaction of Type Iax Supernova Ejecta with a Helium Companion Star
| Autor: | Zhanwen Han, Zheng-Wei Liu, Yaotian Zeng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics 010504 meteorology & atmospheric sciences FOS: Physical sciences White dwarf Astronomy and Astrophysics Astrophysics 01 natural sciences Stars Supernova Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science 0103 physical sciences Binary star Deflagration Variable star Astrophysics - High Energy Astrophysical Phenomena Ejecta 010303 astronomy & astrophysics Chandrasekhar limit Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences |
| Zdroj: | The Astrophysical Journal. 898:12 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/ab9943 |
| Popis: | Type Iax supenovae (SNe Iax) are an important sub-luminous class of SNe Ia. However, their progenitors and explosion mechanism have not been understood yet. It has been suggested that SNe Iax may be produced from weak deflagration explosions of Chandrasekhar-mass white dwarfs (WDs) in binary systems with a helium (He) star donor. In such progenitor systems, the stripped He companion material caused by the ejecta-companion interaction is expected to present some He features in their late-time spectra. However, the detection of He lines in late-time spectra of SNe Iax has not yet been successful, which gives an upper limit on the amount of stripped He mass of < 0.002-0.1 solar masses. In this work, we study the interaction between SN Iax ejecta and a He star companion by performing three-dimensional hydrodynamical simulations with a weak pure deflagration explosion model. We find that about 0.004 solar masses of He material can be stripped off from the companion star by SN explosion, which is very close to (or lower than) the observational upper-limit on the total stripped He mass in SNe Iax. We, therefore, conclude that non-detection of He lines in late-time spectra of SNe Iax could be reasonably explained if they are indeed resulted from weak pure deflagration explosions of Chandrasekhar-mass WDs in progenitor systems with a He star donor. 10 pages, 5 figures, accepted for publication in Astrophysical Journal (ApJ) |
| Databáze: | OpenAIRE |
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