تقرير
Two classes of fast-declining type Ia supernovae
| العنوان: | Two classes of fast-declining type Ia supernovae |
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| المؤلفون: | Dhawan, S., Leibundgut, B., Spyromilio, J., Blondin, S. |
| المصدر: | A&A 602, A118 (2017) |
| سنة النشر: | 2017 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | Fast-declining Type Ia supernovae (SN Ia) separate into two categories based on their bolometric and near-infrared (NIR) properties. The peak bolometric luminosity ($\mathrm{L_{max}}$), the phase of the first maximum relative to the optical, the NIR peak luminosity and the occurrence of a second maximum in the NIR distinguish a group of very faint SN Ia. Fast-declining supernovae show a large range of peak bolometric luminosities ($\mathrm{L_{max}}$ differing by up to a factor of $\sim$ 8). All fast-declining SN Ia with $\mathrm{L_{max}} < 0.3 \cdot$ 10$^{43}\mathrm{erg s}^{-1}$ are spectroscopically classified as 91bg-like and show only a single NIR peak. SNe with $\mathrm{L_{max}} > 0.5 \cdot$ 10$^{43}\mathrm{erg s}^{-1}$ appear to smoothly connect to normal SN Ia. The total ejecta mass (M$_{ej}$) values for SNe with enough late time data are $\lesssim$1 $M_{\odot}$, indicating a sub-Chandrasekhar mass progenitor for these SNe. Comment: 8 pages, 3 figures; Accepted for publication in A&A |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/201629793 |
| URL الوصول: | http://arxiv.org/abs/1702.06585 |
| رقم الأكسشن: | edsarx.1702.06585 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/201629793 |
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