Dyonic Quark Stars in Quasi-Topological Electromagnetism
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866910282424516608 |
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| author | Gammon, Michael De Kock, Nicola Mann, Robert B. Kubeka, Amos |
| author_facet | Gammon, Michael De Kock, Nicola Mann, Robert B. Kubeka, Amos |
| contents | In this paper we consider quark star solutions to Liu et al.'s \cite{Liu_2019} quasi-topological electromagnetism (QTEM), a recently proposed form of dark energy. Since the QTEM contribution is trivial for pure electric/magnetic charge, we consider the dyonic case in pure QTEM which does induce (dark) non-trivial dynamics from the non-linear theory. Besides the introduction of a dyonic charge distribution generally pushing the characteristic quark star `hook' shape to larger masses and radii, it also induces a second branch at very large mass and radius for stars with a small dyonic charge ratio. This second set of solutions have a negative pressure envelope surrounding a positive pressure core. As we explore the parameter space these features interact and evolve in interesting ways, with the two branches eventually merging in $M/R$ space before settling into a characteristic `paperclip' shape as the dyonic charge ratio becomes large. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2606_02511 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Dyonic Quark Stars in Quasi-Topological Electromagnetism Gammon, Michael De Kock, Nicola Mann, Robert B. Kubeka, Amos General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Phenomenology In this paper we consider quark star solutions to Liu et al.'s \cite{Liu_2019} quasi-topological electromagnetism (QTEM), a recently proposed form of dark energy. Since the QTEM contribution is trivial for pure electric/magnetic charge, we consider the dyonic case in pure QTEM which does induce (dark) non-trivial dynamics from the non-linear theory. Besides the introduction of a dyonic charge distribution generally pushing the characteristic quark star `hook' shape to larger masses and radii, it also induces a second branch at very large mass and radius for stars with a small dyonic charge ratio. This second set of solutions have a negative pressure envelope surrounding a positive pressure core. As we explore the parameter space these features interact and evolve in interesting ways, with the two branches eventually merging in $M/R$ space before settling into a characteristic `paperclip' shape as the dyonic charge ratio becomes large. |
| title | Dyonic Quark Stars in Quasi-Topological Electromagnetism |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2606.02511 |