Differences in the Cooling Behavior of Strange Quark Matter Stars and Neutron Stars

Details Differences in the Cooling Behavior of Strange Quark Matter Stars and Neutron Stars Differences in the Cooling Behavior of Strange Quark Matter Stars and Neutron Stars

1997-02-21

arxiv.org/abs/astro-ph/9702189v1

Astrophys.J. 480 (1997) L111-L114

Astronomy and Astrophysics

Astrophysics

9 pages, LaTeX (aas-style file), 2 ps-figures. To be published in ApJ Letters

Scientific paper

10.1086/310626

The general statement that hypothetical strange (quark matter) stars cool more rapidly than neutron stars is investigated in greater detail. It is found that the direct Urca process could be forbidden not only in neutron stars but also in strange stars. In this case, strange stars are slowly cooling, and their surface temperatures are more or less indistinguishable from those of slowly cooling neutron stars. Furthermore the case of enhanced cooling is reinvestigated. It shows that strange stars cool significantly more rapidly than neutron stars within the first $\sim 30$ years after birth. This feature could become particularly interesting if continued observation of SN 1987A would reveal the temperature of the possibly existing pulsar at its center.

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