Spectrum of gravitational waves from long-lasting primordial sources
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00617039" target="_blank" >RIV/68378271:_____/24:00617039 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0364049" target="_blank" >https://hdl.handle.net/11104/0364049</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2024/02/027" target="_blank" >10.1088/1475-7516/2024/02/027</a>
Alternative languages
Result language
angličtina
Original language name
Spectrum of gravitational waves from long-lasting primordial sources
Original language description
We discuss long-lasting gravitational wave sources arising and operating during radiationdominated stage. Under a set of assumptions, we establish the correspondence between cosmological evolution of a source and the resulting gravitational wave spectrum. Namely, for the source energy density ps falling as a power law characterized by the exponent /3, i.e., ps proportional to 1/a13, where a is the Universe scale factor, the spectrum takes the form ohm gw proportional to f213-8 in certain ranges of values of constant /3 and frequencies f. In particular, matching to the best fit power law shape of stochastic gravitational wave background discovered recently by Pulsar Timing Array collaborations, one identifies /3 approximate to 5. We demonstrate the correspondence with concrete examples of long-lasting sources: domain walls and cosmic strings.
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/LUC23115" target="_blank" >LUC23115: Spin 2 WISPers from the laboratory to the cosmos</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
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
2024
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
27
UT code for WoS article
001170290200003
EID of the result in the Scopus database
2-s2.0-85185942771