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Constraints from gravitational wave detections of binary black hole mergers on the $^{12}\rm{C}\left(\alpha,\gamma\right)^{16}\!\rm{O}$ rate

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arxiv 2006.06678 v2 pith:H2EGEZ2T submitted 2020-06-11 astro-ph.HE

classification astro-ph.HE
keywords blackalphagammaholeleftmassrateright
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Gravitational wave detections are starting to allow us to probe the physical processes in the evolution of very massive stars through the imprints they leave on their final remnants. Stellar evolution theory predicts the existence of a gap in the black hole mass distribution at high mass due to the effects of pair-instability. Previously, we showed that the location of the gap is robust against model uncertainties, but it does depend sensitively on the uncertain $^{12}\rm{C}\left(\alpha,\gamma\right)^{16}\!\rm{O}$ rate. This rate is of great astrophysical significance and governs the production of oxygen at the expense of carbon. We use the open source MESA stellar evolution code to evolve massive helium stars to probe the location of the mass gap. We find that the maximum black hole mass below the gap varies between $40\rm{M}_\odot$ to $90\rm{M}_\odot$, depending on the strength of the uncertain $^{12}\rm{C}\left(\alpha,\gamma\right)^{16}\!\rm{O}$ reaction rate. With the first ten gravitational-wave detections of black holes, we constrain the astrophysical S-factor for $^{12}\rm{C}\left(\alpha,\gamma\right)^{16}\!\rm{O}$, at $300\rm{keV}$, to $S_{300}>175\rm{\,keV\, barns}$ at 68% confidence. With $\mathcal{O}(50)$ detected binary black hole mergers, we expect to constrain the S-factor to within $\pm10$-$30\rm{\,keV\, barns}$. We also highlight a role for independent constraints from electromagnetic transient surveys. The unambiguous detection of pulsational pair instability supernovae would imply that $S_{300}>79\rm{\,keV\, barns}$. Degeneracies with other model uncertainties need to be investigated further, but probing nuclear stellar astrophysics poses a promising science case for the future gravitational wave detectors.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A Four-dimensional Model-agnostic Probe into the Astrophysical Origins of Binary Black Hole Subpopulations

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  4. Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset

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