I work with neutron stars from the theoretical point of view and I wish to know the present state of the art of the observational aspects of these compact stars.
This is the most recent I've seen:
Article Constraining the Maximum Mass of Neutron Stars From Multi-Me...
http://iopscience.iop.org/article/10.3847/2041-8213/aa991c/meta
The recent Gravitational-wave observation GW170817 has constrained the maximum mass of neutron stars in the range around 2.0 Solar mass.
while a very recent detection GW190425 has constrained it to 2.45 Solar mass.
Recently 3 massive pulsar was detected. You can see in the following references.
1. Antoniadis J., et al., 2013, Science, 34.
2. Fonseca E., et al., 2016, ApJ, 832, 167.
3. Cromartie H. T., et al., 2019, Nature Astronomy, 4, 72–76.
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