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- W2296465908 endingPage "13" @default.
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- W2296465908 abstract "An accretion outburst onto a neutron star deposits hydrogen-rich and/or helium-rich material into the neutron star's envelope. Thermonuclear burning of accreted material robustly produces Urca pairstextrm{---}pairs of nuclei that undergo cycles of $e^-$-capture and $beta ^-$-decay. The strong $T^5$ dependence of the Urca cooling neutrino luminosity means that Urca pairs in the neutron star interior potentially remove heat from accretion-driven nuclear reactions. In this study, we identify Urca pairs in the neutron star's ocean textrm{---} a plasma of ions and electrons overlaying the neutron star crust textrm{---} and demonstrate that Urca cooling occurs at all depths in the ocean. We find that Urca pairs in the ocean and crust lower the ocean's steady-state temperature during an accretion outburst and that unstable carbon ignition, which is thought to trigger superbursts, occurs deeper than it would otherwise. Cooling superburst light curves, however, are only marginally impacted by cooling from Urca pairs because the superburst peak radiative luminosity $L_{rm peak}$ is always much greater than the Urca pair neutrino luminosity $L_{nu}$ in the hot post-superburst ocean." @default.
- W2296465908 created "2016-06-24" @default.
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- W2296465908 date "2016-10-21" @default.
- W2296465908 modified "2023-10-17" @default.
- W2296465908 title "URCA COOLING PAIRS IN THE NEUTRON STAR OCEAN AND THEIR EFFECT ON SUPERBURSTS" @default.
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- W2296465908 doi "https://doi.org/10.3847/0004-637x/831/1/13" @default.
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