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Author  |
Garcia-Cely, C.; Ringwald, A. |
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Title |
Stellar bounds on light spin-2 particles in bimetric theories |
Type |
Journal Article |
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Year |
2026 |
Publication |
Journal of Cosmology and Astroparticle Physics |
Abbreviated Journal |
J. Cosmol. Astropart. Phys. |
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Volume |
03 |
Issue |
3 |
Pages |
049 - 24pp |
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Keywords |
Gravitational waves in GR and beyond: theory; solar physics; stars; dark matter theory |
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Abstract |
Using the bimetric formalism, we compute the production and emission rates of light spin-2 particles in non-degenerate stellar interiors through photoproduction and bremsstrahlung processes, including the effects of plasma screening. By comparing the resulting energy-loss rates with observational limits on stellar cooling, we derive bounds on the coupling strength and mass of the spin-2 particle. Assuming these particles are the dark matter of the Universe, the obtained constraints are competitive with existing astrophysical and cosmological limits, excluding a wide region of parameter space in the mass range 5-30 eV. |
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Address |
[Garcia-Cely, Camilo] Univ Valencia, Inst Fis Corpuscular IFIC, CSIC, Parc Cientif UV,C Catedrat Jose Beltran 2, E-46980 Paterna, Spain, Email: Camilo.Garcia@ific.uv.es; |
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Publisher |
IOP Publishing Ltd |
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Language |
English |
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Original Title |
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Series Volume |
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Edition |
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ISSN |
1475-7516 |
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Notes |
WOS:001718578300005 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7148 |
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