تقرير
A new bump in the night: evidence of a new feature in the binary black hole mass distribution at $70~M_{\odot}$ from gravitational-wave observations
| العنوان: | A new bump in the night: evidence of a new feature in the binary black hole mass distribution at $70~M_{\odot}$ from gravitational-wave observations |
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| المؤلفون: | Hernandez, Ignacio Magaña, Palmese, Antonella |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology |
| الوصف: | We analyze the confident binary black hole (BBH) detections from the third Gravitational-Wave Transient Catalog (GWTC-3) with an alternative mass population model in order to capture features in the mass distribution beyond the Powerlaw + Peak model. We find that the peak of a second power law characterizes the $\sim 30-35~ M_\odot$ bump, such that the data marginally prefers a mixture of two power laws for the mass distribution of binary components over a Powerlaw + Peak model with a Bayes Factor $\log_{10}\mathcal{B}$ of 0.1. This result may imply that the $\sim 30-35~ M_\odot$ feature represents the onset of a second population of BBH mergers (e.g. from a dynamical formation channel) rather than a specific mass feature over a broader distribution. When an additional Gaussian bump is allowed within our power law mixture model, we find a new feature in the BH mass spectrum at $\sim65-70~M_\odot$. This new feature may be consistent with hierarchical mergers, and constitute $\sim2\%$ of the BBH population. This model also recovers a maximum mass of $58^{+30}_{-14}~M_\odot$ for the second power law, consistent with the onset of a pair-instability supernova mass gap. Comment: Comments are welcomed |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2407.02460Test |
| رقم الانضمام: | edsarx.2407.02460 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |