Quarkyonic Neutron Stars as Candidates for the GW230529 Mass-Gap Object
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866912912547774464 |
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| author | Pattnaik, Jeet Amrit Patra, S. K. |
| author_facet | Pattnaik, Jeet Amrit Patra, S. K. |
| contents | We examine whether quarkyonic equations of state (EOS) can account for compact objects in the $2.5$-$4.5\,M_\odot$ mass range reported for the GW230529 gravitational-wave event. The pressure-energy density and mass-radius (M-R) relations obtained from quarkyonic EOS models indicate a significant stiffening at high densities, allowing stable configurations beyond $2.5\,M_\odot$. The predicted M-R sequences extend into the GW230529 mass window while maintaining radii in the range of $\approx 13$-$15$~km, suggesting that quarkyonic stars can naturally populate the so-called compact object mass gap. These results imply that the heavier component of GW230529 could plausibly be a massive quarkyonic neutron star rather than a low-mass black hole. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_14266 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quarkyonic Neutron Stars as Candidates for the GW230529 Mass-Gap Object Pattnaik, Jeet Amrit Patra, S. K. High Energy Astrophysical Phenomena We examine whether quarkyonic equations of state (EOS) can account for compact objects in the $2.5$-$4.5\,M_\odot$ mass range reported for the GW230529 gravitational-wave event. The pressure-energy density and mass-radius (M-R) relations obtained from quarkyonic EOS models indicate a significant stiffening at high densities, allowing stable configurations beyond $2.5\,M_\odot$. The predicted M-R sequences extend into the GW230529 mass window while maintaining radii in the range of $\approx 13$-$15$~km, suggesting that quarkyonic stars can naturally populate the so-called compact object mass gap. These results imply that the heavier component of GW230529 could plausibly be a massive quarkyonic neutron star rather than a low-mass black hole. |
| title | Quarkyonic Neutron Stars as Candidates for the GW230529 Mass-Gap Object |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2511.14266 |