Academic Journal
Neutron-mirror neutron mixing and neutron stars
| Title: | Neutron-mirror neutron mixing and neutron stars |
|---|---|
| Authors: | Zurab Berezhiani, Riccardo Biondi, Massimo Mannarelli, Francesco Tonelli |
| Source: | European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-23 (2021) |
| Publisher Information: | SpringerOpen, 2021. |
| Publication Year: | 2021 |
| Collection: | LCC:Astrophysics LCC:Nuclear and particle physics. Atomic energy. Radioactivity |
| Subject Terms: | Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798 |
| More Details: | Abstract The oscillation of neutron n into mirror neutron $$n'$$ n ′ , its mass degenerate partner from dark mirror sector, can gradually transform the neutron stars into the mixed stars consisting in part of mirror dark matter. In quark stars $$n-n'$$ n - n ′ transitions are suppressed. We study the structure of mixed stars and derive the mass-radius scaling relations between the configurations of purely neutron star and maximally mixed star (MMS) containing equal amounts of ordinary and mirror components. In particular, we show that the MMS masses can be at most $$M^{\mathrm{max}}_{NS}/\sqrt{2}$$ M NS max / 2 , where $$M^\mathrm{max}_{NS}$$ M NS max is a maximum mass of a pure neutron star allowed by a given equation of state. We evaluate $$n-n'$$ n - n ′ transition rate in neutron stars, and show that various astrophysical limits on pulsar properties exclude the transition times in a wide range $$10^{5}\,\text {year}< \tau _\varepsilon < 10^{15}\,\text {year}$$ 10 5 year < τ ε < 10 15 year . For short transition times, $$\tau _\varepsilon < 10^5$$ τ ε < 10 5 year, the different mixed stars of the same mass can have different radii, depending on their age, which possibility can be tested by the NICER measurements. We also discuss subtleties related with the possible existence of mixed quark stars, and possible implications for the gravitational waves from the neutron star mergers and associated electromagnetic signals. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1434-6044 1434-6052 |
| Relation: | https://doaj.org/toc/1434-6044; https://doaj.org/toc/1434-6052 |
| DOI: | 10.1140/epjc/s10052-021-09806-1 |
| Access URL: | https://doaj.org/article/2b8bbe9e261b41fcb36ac06f39a0a888 |
| Accession Number: | edsdoj.2b8bbe9e261b41fcb36ac06f39a0a888 |
| Database: | Directory of Open Access Journals |
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| ISSN: | 14346044 14346052 |
|---|---|
| DOI: | 10.1140/epjc/s10052-021-09806-1 |
| Published in: | European Physical Journal C: Particles and Fields |
| Language: | English |