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Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field

Binary pulsar observations and gravitational wave detections seriously constrained scalar–tensor theories with massless scalar field allowing only small deviations from general relativity. If we consider a nonzero mass of the scalar field, though, significant deviations from general relativity are a...

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Autores principales: Staykov, Kalin V., Popchev, Dimitar, Doneva, Daniela D., Yazadjiev, Stoytcho S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6061109/
https://www.ncbi.nlm.nih.gov/pubmed/30100815
http://dx.doi.org/10.1140/epjc/s10052-018-6064-x
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author Staykov, Kalin V.
Popchev, Dimitar
Doneva, Daniela D.
Yazadjiev, Stoytcho S.
author_facet Staykov, Kalin V.
Popchev, Dimitar
Doneva, Daniela D.
Yazadjiev, Stoytcho S.
author_sort Staykov, Kalin V.
collection PubMed
description Binary pulsar observations and gravitational wave detections seriously constrained scalar–tensor theories with massless scalar field allowing only small deviations from general relativity. If we consider a nonzero mass of the scalar field, though, significant deviations from general relativity are allowed for values of the parameters that are in agreement with the observations. In the present paper we extend this idea and we study scalar–tensor theory with massive field with self-interaction term in the potential. The additional term suppresses the scalar field in the neutron star models in addition to the effect of the mass of the scalar field but still, large deviations from pure GR can be observed for values of the parameters that are in agreement with the observations.
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spelling pubmed-60611092018-08-09 Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field Staykov, Kalin V. Popchev, Dimitar Doneva, Daniela D. Yazadjiev, Stoytcho S. Eur Phys J C Part Fields Regular Article - Theoretical Physics Binary pulsar observations and gravitational wave detections seriously constrained scalar–tensor theories with massless scalar field allowing only small deviations from general relativity. If we consider a nonzero mass of the scalar field, though, significant deviations from general relativity are allowed for values of the parameters that are in agreement with the observations. In the present paper we extend this idea and we study scalar–tensor theory with massive field with self-interaction term in the potential. The additional term suppresses the scalar field in the neutron star models in addition to the effect of the mass of the scalar field but still, large deviations from pure GR can be observed for values of the parameters that are in agreement with the observations. Springer Berlin Heidelberg 2018-07-20 2018 /pmc/articles/PMC6061109/ /pubmed/30100815 http://dx.doi.org/10.1140/epjc/s10052-018-6064-x Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3
spellingShingle Regular Article - Theoretical Physics
Staykov, Kalin V.
Popchev, Dimitar
Doneva, Daniela D.
Yazadjiev, Stoytcho S.
Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field
title Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field
title_full Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field
title_fullStr Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field
title_full_unstemmed Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field
title_short Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field
title_sort static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field
topic Regular Article - Theoretical Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6061109/
https://www.ncbi.nlm.nih.gov/pubmed/30100815
http://dx.doi.org/10.1140/epjc/s10052-018-6064-x
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