Horndeski speed tests with scalar-photon couplings
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00618951" target="_blank" >RIV/68378271:_____/25:00618951 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0365746" target="_blank" >https://hdl.handle.net/11104/0365746</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2025/01/041" target="_blank" >10.1088/1475-7516/2025/01/041</a>
Alternative languages
Result language
angličtina
Original language name
Horndeski speed tests with scalar-photon couplings
Original language description
We revisit multi-messenger constraints from neutron star mergers on the speed ofpropagation of gravitational and electromagnetic waves in Horndeski and beyond Horndeskitheories. By considering non-trivial couplings between the dark energy field and theelectromagnetic sector, the electromagnetic wave can propagate through the cosmological backgroundat non-unit speed, altering the phenomenological constraints on its gravitational counterpart. Inparticular, we show that recent models derived from a Kaluza-Klein compactification of higherdimensional Horndeski models fall into a broader class of theories disformally related to thosewhose gravitational waves propagate with unit speed. This disformal equivalence can, however, bebroken by the gravitational couplings to other sectors with interesting phenomenologicalconsequences. We also consider higher order couplings between the scalar and the photon withsecond order field equations, and show that they are not compatible with constraints coming frommulti-messenger speed tests and the decay of the gravitational wave.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/GM21-16583M" target="_blank" >GM21-16583M: New avenues in the hunt for dark energy</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516
e-ISSN
1475-7516
Volume of the periodical
2025
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
041
UT code for WoS article
001540906300011
EID of the result in the Scopus database
2-s2.0-85215707472