Keith Cooper is a freelance science journalist and editor in the United Kingdom, and has a degree in physics and astrophysics from the University of Manchester.
An artist's impression of one of the cool neutron stars. Image credit: ICE-CSIC/D. Futselaar/Marino et al., born in the fires of other exploding stars, have cooled off surprisingly quickly, bringing us closer to understanding the exotic nature of matter within the cores of these extreme objects.
Now, however, the discovery of three neutron stars with substantially lower surface temperatures compared to other neutron stars of similar age has provided a big clue, allowing researchers to rule out three-quarters of the possible models for the neutron star equation of state in one stroke. Two of the neutron stars are, which are rapidly spinning neutron stars that fire beams of radio jets toward us.
Neutron stars can cool via two mechanisms. One is through thermal radiation from their surfaces that allows heat energy to escape into the cold ofemission, which steals away energy from the core of a neutron star, and is thought to be responsible for the fast cooling of this particular neutron star trio.
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