تقرير
The volumetric rate of normal type Ia supernovae in the local Universe discovered by the Palomar Transient Factory
| العنوان: | The volumetric rate of normal type Ia supernovae in the local Universe discovered by the Palomar Transient Factory |
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| المؤلفون: | C. Frohmaier, M Sullivan, P E Nugent, M Smith, G Dimitriadis, J S Bloom, S B Cenko, M M Kasliwal, S R Kulkarni, K. Maguire, E O Ofek, D Poznanski, R M Quimby |
| المصدر: | Monthly Notices of the Royal Astronomical Society. 486(2) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Astronomy |
| الوصف: | We present the volumetric rate of normal type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory (PTF). Using strict data-quality cuts, and considering only periods when the PTF maintained a regular cadence, PTF discovered 90 SNe Ia at z ≤ 0.09 in a well-controlled sample over three years of operation (2010–2012). We use this to calculate the volumetric rate of SN Ia events by comparing this sample to simulations of hundreds of millions of SN Ia light curves produced in statistically representative realizations of the PTF survey. This quantifies the recovery efficiency of each PTF SN Ia event, and thus the relative weighting of each event. From this, the volumetric SN Ia rate was found to be r(v) = 2.43 ± 0.29 (stat)(+0.33,−0.19)(sys) × 10^(−5) SNe per yr Mpc^(-3) h(3,70). This represents the most precise local measurement of the SNIa rate. We fit a simple SNIa delay-time distribution model, ∝ t^(−β) , to our PTF rate measurement combined with a literature sample of rate measurements from surveys at higher redshifts. We find β ∼ 1, consistent with a progenitor channel governed by the gravitational inspiral of binary white dwarfs. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stz807 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20210014803 |
| ملاحظات: | 789737 ERC 615929 DE-AC02-05CH11231 |
| رقم الأكسشن: | edsnas.20210014803 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 13652966 00358711 |
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| DOI: | 10.1093/mnras/stz807 |