Dark matter and bubble nucleation in old neutron stars

Herrero, A.; Pérez-García, M. Ángeles; Silk, Joseph; Albertus, C.

doi:10.1103/physrevd.100.103019

Cited by 11 publications

(2 citation statements)

References 77 publications

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“…The amount of LDM captured by the opaque star [25] is an increasing function of time as the χ population sinks towards the center [26,27]. However as the local DM density grows, the self-annihilation reactions will start to be efficient leading to potentially dramatic changes [28]. In more detail, the dynamical number of LDM particles, N χ , is obtained by solving…”

Section: Dark Matter Inside the Cooling Neutron Starmentioning

confidence: 99%

Cooling of Neutron Stars admixed with Light Dark Matter: a case study

Pérez-García,

Grigorian,

Albertus

et al. 2022

Preprint

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Neutron Stars (NSs) are born as hot, lepton-rich objects that evolve according to the standard paradigm through subsequent stages where they radiate the excess of energy by emitting, first, neutrinos and, later on, photons. Current descriptions based on Standard Model calculations cannot fully explain all the existing cooling data series for the dozens of objects that have been reported. In this work, we consider the intriguing possibility that cooling NSs could be actually admixed with a fraction of light dark matter (LDM), χ. We focus on a particular case study assuming a generic light candidate with mass mχ = 0.1 GeV/c 2 that undergoes self-annihilating reactions through pseudoscalar mediators producing neutrinos in the final state. We include one additional feature, allowing thermal conduction from LDM while inside the dark core. By performing simulations of the temperature evolution in the NS, we find that cooling patterns could be distorted by the presence of LDM and discuss these results in light of their observability.

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Section: Dark Matter Inside the Cooling Neutron Starmentioning

confidence: 99%

Cooling of Neutron Stars admixed with Light Dark Matter: a case study

Pérez-García,

Grigorian,

Albertus

et al. 2022

Preprint

Self Cite

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“…Thus, the udlet flux as coming only from binary mergers involving heavy udQSs would be much smaller than the flux in the "all compact stars being udQSs" case, and the chance of low-mass stars converted by udlets is expected to be small. Quantum nucleation could also be facilitated by the energy injection produced by dark matter annihilation inside neutron stars [62], while the efficiency depends crucially on the dark matter mass.…”

Section: B Coexistence Of Hadronic Stars and Udqssmentioning

confidence: 99%

Quantum nucleation of up-down quark matter and astrophysical implications

Ren

Zhang

2020

Phys. Rev. D

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Quark matter with only u and d quarks (udQM) might be the ground state of baryonic matter at large baryon number A > A min. With A min ≳ 300, this has no direct conflict with the stability of ordinary nuclei. An intriguing test of this scenario is to look for quantum nucleation of udQM inside neutron stars due to their large baryon densities. In this paper, we study the transition rate of cold neutron stars to ud quark stars (udQSs) and the astrophysical implications, considering the relevant theoretical uncertainties and observational constraints. It turns out that a large portion of parameter space predicts an instantaneous transition, and so the observed neutron stars are mostly udQSs. We find this possibility still viable under the recent gravitational wave and pulsar observations, although there are debates on its compatibility with some observations that involve some complex structures of quark matter. The tension could be partially relieved in the two-families scenario, where the high-mass stars (M ≳ 2 M ⊙) are all udQSs and the low-mass ones (M ∼ 1.4 M ⊙) are mostly hadronic stars. In this case, the slow transition of the low-mass hadronic stars points to a very specific class of hadronic models with moderately stiff EOSs, and udQM properties are also strongly constrained.

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Modelling of dark energy stars with tolman IV gravitational potential

Dayanandan

Smitha

2021

Chinese Journal of Physics

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Dark matter and bubble nucleation in old neutron stars

Cited by 11 publications

References 77 publications

Cooling of Neutron Stars admixed with Light Dark Matter: a case study

Cooling of Neutron Stars admixed with Light Dark Matter: a case study

Quantum nucleation of up-down quark matter and astrophysical implications

Modelling of dark energy stars with tolman IV gravitational potential

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