تقرير
Effects of type Ia supernovae absolute magnitude priors on the Hubble constant value
| العنوان: | Effects of type Ia supernovae absolute magnitude priors on the Hubble constant value |
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| المؤلفون: | Chen, Yun, Kumar, Suresh, Ratra, Bharat, Xu, Tengpeng |
| المصدر: | ApJL, 2024, 964, L4 |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We systematically explore the influence of the prior of the peak absolute magnitude ($M$) of type Ia supernovae (SNe Ia) on the measurement of the Hubble constant ($H_0$) from SNe Ia observations. We consider five different data-motivated $M$ priors, representing varying levels of dispersion, and assume the spatially-flat $\Lambda$CDM cosmological model. Different $M$ priors lead to relative changes in the mean values of $H_0$ from 2% to 7%. Loose priors on $M$ yield $H_0$ estimates consistent with both the Planck 2018 result and the SH0ES result at the 68% confidence level. We also examine the potential impact of peculiar velocity subtraction on the value of $H_0$, and show that it is insignificant for the SNe Ia observations with redshift $z > 0.01$ used in our analyses. We also repeat the analysis in the cosmography model and find very similar results. This suggests that our results are robust and model independent. Comment: 10 pages, 1 figure, 1 table; Accepted for Publication in ApJL |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/2041-8213/ad2e97 |
| URL الوصول: | http://arxiv.org/abs/2401.13187 |
| رقم الأكسشن: | edsarx.2401.13187 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/2041-8213/ad2e97 |
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