Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-12-06
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
11 pages, 8 figures; to appear in MNRAS; minor corrections and used improved (and magnetic) envelope calculations
Scientific paper
10.1111/j.1365-2966.2012.20826.x
We examine to what extent the inferred surface temperature of magnetars in quiescence can constrain the presence of a superfluid in the neutron star core and the role of magnetic field decay in the core. By performing detailed simulations of neutron star cooling, we show that extremely strong heating from field decay in the core cannot produce the high observed surface temperatures nor delay the onset of neutron superfluidity in the core. We verify the results of Kaminker et al., namely that the high magnetar surface temperatures require heating in the neutron star crust, and crust heating is decoupled from cooling/heating in the core. Therefore, because crust heating masks core heating, it is not possible to conclude that magnetar cores are in a non-superfluid state purely from high surface temperatures. From our interior temperature evolutions and after accounting for proton superconductivity in the core, we find that neutron superfluidity in the core occurs less than a few hundred years after neutron star formation. This onset time is unaffected by heating due to core field decay at fields < 10^16 G. Thus all known neutron stars, including magnetars, without a core containing exotic particles, should have a core of superfluid neutrons and superconducting protons.
Andersson Nils.
Glampedakis Kostas
Ho Wynn C. G.
No associations
LandOfFree
Magnetars: Super(ficially) hot and super(fluid) cool does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnetars: Super(ficially) hot and super(fluid) cool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetars: Super(ficially) hot and super(fluid) cool will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-593727