Fate of large-scale structure in modified gravity after GW170817 and GRB170817A
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00501994" target="_blank" >RIV/68378271:_____/18:00501994 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.120.131101" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.120.131101</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.120.131101" target="_blank" >10.1103/PhysRevLett.120.131101</a>
Alternative languages
Result language
angličtina
Original language name
Fate of large-scale structure in modified gravity after GW170817 and GRB170817A
Original language description
The coincident detection of gravitational waves (GW) and a gamma-ray burst from a merger of neutron stars has placed an extremely stringent bound on the speed of GW. We showed previously that the presence of gravitational slip (η) in cosmology is intimately tied to modifications of GW propagation. This new constraint implies that the only remaining viable source of gravitational slip is a conformal coupling to gravity in scalar-tensor theories, while viable vector-tensor theories cannot now generate gravitational slip at all. We discuss structure formation in the remaining viable models, demonstrating that (i) the dark-matter growth rate must now be at least as fast as in GR, with the possible exception of the beyond Horndeski model. (ii) If there is any scale-dependence at all in the slip parameter, it is such that it takes the GR value at large scales. We show a consistency relation which must be violated if gravity is modified.
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
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Cosmology, Gravity and the Dark Sector of the Universe</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
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Volume of the periodical
120
Issue of the periodical within the volume
13
Country of publishing house
US - UNITED STATES
Number of pages
4
Pages from-to
1-4
UT code for WoS article
000428394800004
EID of the result in the Scopus database
2-s2.0-85044779271