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A Neutron Star is born
- Source :
- Universe, Volume 7, Issue 8, Universe, Vol 7, Iss 267, p 267 (2021)
- Publication Year :
- 2021
- Publisher :
- arXiv, 2021.
-
Abstract
- A neutron star was first detected as a pulsar in 1967. It is one of the most mysterious compact objects in the universe, with a radius of the order of 10 km and masses that can reach two solar masses. In fact, neutron stars are star remnants, a kind of stellar zombies (they die, but do not disappear). In the last decades, astronomical observations yielded various contraints for the neutron star masses and finally, in 2017, a gravitational wave was detected (GW170817). Its source was identified as the merger of two neutron stars coming from NGC 4993, a galaxy 140 million light years away from us. The very same event was detected in $\gamma$-ray, x-ray, UV, IR, radio frequency and even in the optical region of the electromagnetic spectrum, starting the new era of multi-messenger astronomy. To understand and describe neutron stars, an appropriate equation of state that satisfies bulk nuclear matter properties is necessary. GW170817 detection contributed with extra constraints to determine it. On the other hand, magnetars are the same sort of compact objects, but bearing much stronger magnetic fields that can reach up to 10$^{15}$ G on the surface as compared with the usual 10$^{12}$ G present in ordinary pulsars. While the description of ordinary pulsars is not completely established, describing magnetars poses extra challenges. In this paper, I give an overview on the history of neutron stars and on the development of nuclear models and show how the description of the tiny world of the nuclear physics can help the understanding of the cosmos, especially of the neutron stars.<br />Comment: 28 pages, 23 figures, 2 tables
- Subjects :
- Nuclear Theory
equations of state
Astrophysics::High Energy Astrophysical Phenomena
General Physics and Astronomy
FOS: Physical sciences
Astrophysics
QC793-793.5
Astrophysics::Cosmology and Extragalactic Astrophysics
Compact star
Magnetar
01 natural sciences
neutron stars
Nuclear Theory (nucl-th)
Pulsar
0103 physical sciences
010306 general physics
Astrophysics::Galaxy Astrophysics
Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
Solar mass
010308 nuclear & particles physics
Gravitational wave
Elementary particle physics
relativistic models
Nuclear matter
Galaxy
Neutron star
gravitational waves
Computer Science::Programming Languages
Astrophysics - High Energy Astrophysical Phenomena
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Universe, Volume 7, Issue 8, Universe, Vol 7, Iss 267, p 267 (2021)
- Accession number :
- edsair.doi.dedup.....3662b54dbe1dfa0704993a54fe57df13
- Full Text :
- https://doi.org/10.48550/arxiv.2106.09515