Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs
In 1995, Glendenning, Kettner and Weber postulated the existence of a new class of compact stars resembling white dwarfs but containing a small strange quark-matter core surrounded by hadronic layers attaining much higher densities than those found in white dwarfs. In our previous study, we have sho...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/9/9/382 |
| _version_ | 1827723112222818304 |
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| author | Loïc Perot Nicolas Chamel |
| author_facet | Loïc Perot Nicolas Chamel |
| author_sort | Loïc Perot |
| collection | DOAJ |
| description | In 1995, Glendenning, Kettner and Weber postulated the existence of a new class of compact stars resembling white dwarfs but containing a small strange quark-matter core surrounded by hadronic layers attaining much higher densities than those found in white dwarfs. In our previous study, we have shown that it could be possible to unmask these so-called strange dwarfs through gravitational-wave observations with future space-based detectors such as the Laser Interferometer Space Antenna. We calculated more realistic equations of state for the hadronic envelope, but the quark core was treated using the simplest MIT bag model. In this paper, we investigate more closely the role of the possibly solid core in the structure and the tidal deformability of strange dwarfs in the full general relativistic framework by considering different models of strange quark matter in the crystalline color -superconducting phase. We find that the effect of the extreme rigidity of the elastic core on the tidal deformability is almost completely canceled by the surrounding hadronic layers. However, in all cases, the tidal deformability of strange dwarfs remains sufficiently lower than that of white dwarfs, to be potentially observable with gravitational waves despite the uncertainties in the strange quark-matter equation of state. |
| first_indexed | 2024-03-10T21:53:48Z |
| format | Article |
| id | doaj.art-922c34f614d248209189eec959f7759a |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-10T21:53:48Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-922c34f614d248209189eec959f7759a2023-11-19T13:17:13ZengMDPI AGUniverse2218-19972023-08-019938210.3390/universe9090382Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange DwarfsLoïc Perot0Nicolas Chamel1Institute of Astronomy and Astrophysics, CP-226, Université Libre de Bruxelles, 1050 Brussels, BelgiumInstitute of Astronomy and Astrophysics, CP-226, Université Libre de Bruxelles, 1050 Brussels, BelgiumIn 1995, Glendenning, Kettner and Weber postulated the existence of a new class of compact stars resembling white dwarfs but containing a small strange quark-matter core surrounded by hadronic layers attaining much higher densities than those found in white dwarfs. In our previous study, we have shown that it could be possible to unmask these so-called strange dwarfs through gravitational-wave observations with future space-based detectors such as the Laser Interferometer Space Antenna. We calculated more realistic equations of state for the hadronic envelope, but the quark core was treated using the simplest MIT bag model. In this paper, we investigate more closely the role of the possibly solid core in the structure and the tidal deformability of strange dwarfs in the full general relativistic framework by considering different models of strange quark matter in the crystalline color -superconducting phase. We find that the effect of the extreme rigidity of the elastic core on the tidal deformability is almost completely canceled by the surrounding hadronic layers. However, in all cases, the tidal deformability of strange dwarfs remains sufficiently lower than that of white dwarfs, to be potentially observable with gravitational waves despite the uncertainties in the strange quark-matter equation of state.https://www.mdpi.com/2218-1997/9/9/382quark matterstrange dwarfwhite dwarfcolor superconductivitygravitational waves |
| spellingShingle | Loïc Perot Nicolas Chamel Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs Universe quark matter strange dwarf white dwarf color superconductivity gravitational waves |
| title | Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs |
| title_full | Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs |
| title_fullStr | Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs |
| title_full_unstemmed | Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs |
| title_short | Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs |
| title_sort | role of quark matter and color superconductivity in the structure and tidal deformability of strange dwarfs |
| topic | quark matter strange dwarf white dwarf color superconductivity gravitational waves |
| url | https://www.mdpi.com/2218-1997/9/9/382 |
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