TY - JOUR
AU1 - Anzuini, F
AU2 - Melatos, A
AU3 - Dehman, C
AU4 - Viganò, D
AU5 - Pons, J A
AB - Abstract Neutron star models with maximum mass close to 2 M⊙ reach high central densities, which may activate nucleonic and hyperon direct Urca neutrino emission. To alleviate the tension between fast theoretical cooling rates and thermal luminosity observations of moderately magnetized, isolated thermally-emitting stars (with Lγ ≳ 1031 erg s−1 at t ≳ 105.3 yr), some internal heating source is required. The power supplied by the internal heater is estimated for both a phenomenological source in the inner crust and Joule heating due to magnetic field decay, assuming different superfluidity models and compositions of the outer stellar envelope. It is found that a thermal power of W(t) ≈ 1034 erg s−1 allows neutron star models to match observations of moderately magnetized, isolated stars with ages t ≳ 105.3 yr. The requisite W(t) can be supplied by Joule heating due to crust-confined initial magnetic configurations with (i) mixed poloidal-toroidal fields, with surface strength Bdip = 1013 G at the pole of the dipolar poloidal component and ∼90 per cent of the magnetic energy stored in the toroidal component; and (ii) poloidal-only configurations with Bdip = 1014 G. stars: neutron, stars: interiors, stars: magnetic fields, stars: evolution This content is only available as a PDF. © 2021 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)
TI - Fast cooling and internal heating in hyperon stars
JF - Monthly Notices of the Royal Astronomical Society
DO - 10.1093/mnras/stab3126
DA - 2021-10-29
UR - https://www.deepdyve.com/lp/oxford-university-press/fast-cooling-and-internal-heating-in-hyperon-stars-MKTUIktF0h
SP - 1
EP - 1
VL - Advance Article
IS - 
DP - DeepDyve
ER -