Torsional oscillations of strange stars
Strange stars are one of the hypothetical compact stellar objects that can be formed after a supernova explosion. The existence of these objects relies on the absolute stability of strange collapsed quark matter with respect to standard nuclear matter. We discuss simple models of strange stars with...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2014-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20148000039 |
| _version_ | 1818893419542478848 |
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| author | Mannarelli Massimo |
| author_facet | Mannarelli Massimo |
| author_sort | Mannarelli Massimo |
| collection | DOAJ |
| description | Strange stars are one of the hypothetical compact stellar objects that can be formed after a supernova explosion. The existence of these objects relies on the absolute stability of strange collapsed quark matter with respect to standard nuclear matter. We discuss simple models of strange stars with a bare quark matter surface, thus standard nuclear matter is completely absent. In these models an electric dipole layer a few hundreds Fermi thick should exist close to the star surface. Studying the torsional oscillations of the electrically charged layer we estimate the emitted power, finding that it is of the order of 1045 erg/s, meaning that these objects would be among the brightest compact sources in the heavens. The associated relaxation times are very uncertain, with values ranging between microseconds and minutes, depending on the crust thickness. Although part of the radiated power should be absorbed by the electrosphere surrounding the strange star, a sizable fraction of photons should escape and be detectable. |
| first_indexed | 2024-12-19T18:12:18Z |
| format | Article |
| id | doaj.art-16be8eccbde0450190651291a8cd514a |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-19T18:12:18Z |
| publishDate | 2014-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-16be8eccbde0450190651291a8cd514a2022-12-21T20:11:17ZengEDP SciencesEPJ Web of Conferences2100-014X2014-01-01800003910.1051/epjconf/20148000039epjconf_qcd2014_00039Torsional oscillations of strange starsMannarelli Massimo0INFN, Laboratori Nazionali del Gran SassoStrange stars are one of the hypothetical compact stellar objects that can be formed after a supernova explosion. The existence of these objects relies on the absolute stability of strange collapsed quark matter with respect to standard nuclear matter. We discuss simple models of strange stars with a bare quark matter surface, thus standard nuclear matter is completely absent. In these models an electric dipole layer a few hundreds Fermi thick should exist close to the star surface. Studying the torsional oscillations of the electrically charged layer we estimate the emitted power, finding that it is of the order of 1045 erg/s, meaning that these objects would be among the brightest compact sources in the heavens. The associated relaxation times are very uncertain, with values ranging between microseconds and minutes, depending on the crust thickness. Although part of the radiated power should be absorbed by the electrosphere surrounding the strange star, a sizable fraction of photons should escape and be detectable.http://dx.doi.org/10.1051/epjconf/20148000039 |
| spellingShingle | Mannarelli Massimo Torsional oscillations of strange stars EPJ Web of Conferences |
| title | Torsional oscillations of strange stars |
| title_full | Torsional oscillations of strange stars |
| title_fullStr | Torsional oscillations of strange stars |
| title_full_unstemmed | Torsional oscillations of strange stars |
| title_short | Torsional oscillations of strange stars |
| title_sort | torsional oscillations of strange stars |
| url | http://dx.doi.org/10.1051/epjconf/20148000039 |
| work_keys_str_mv | AT mannarellimassimo torsionaloscillationsofstrangestars |