Donutization Inside Neutron Stars: Shell-Localized Scalar Fields
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911717790842880 |
|---|---|
| author | Kuan, Hao-Jui Lam, Alan Tsz-Lok Noronha-Hostler, Jacquelyn Yunes, Nicolás |
| author_facet | Kuan, Hao-Jui Lam, Alan Tsz-Lok Noronha-Hostler, Jacquelyn Yunes, Nicolás |
| contents | Heavy scalar fields ($m_ϕ\gtrsim10^{-9}$ eV) in scalar-tensor gravity are expected to be hidden from neutron-star observations because their Compton wavelength is sub-stellar. We show that neutron stars can nevertheless scalarize by forming a shell-localized profile, suppressed at their center and exterior but peaked in their interior. This \emph{donutization} reshapes the effective equation of state, making hadronic stars mimic quark-star mass-radius behavior or hybrid-star behavior with split stable branches, and breaks the $I$--$Q$ relation, while remaining hidden from binary pulsar observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26228 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Donutization Inside Neutron Stars: Shell-Localized Scalar Fields Kuan, Hao-Jui Lam, Alan Tsz-Lok Noronha-Hostler, Jacquelyn Yunes, Nicolás General Relativity and Quantum Cosmology Heavy scalar fields ($m_ϕ\gtrsim10^{-9}$ eV) in scalar-tensor gravity are expected to be hidden from neutron-star observations because their Compton wavelength is sub-stellar. We show that neutron stars can nevertheless scalarize by forming a shell-localized profile, suppressed at their center and exterior but peaked in their interior. This \emph{donutization} reshapes the effective equation of state, making hadronic stars mimic quark-star mass-radius behavior or hybrid-star behavior with split stable branches, and breaks the $I$--$Q$ relation, while remaining hidden from binary pulsar observations. |
| title | Donutization Inside Neutron Stars: Shell-Localized Scalar Fields |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2605.26228 |