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  An effective action model of dynamically scalarizing binary neutron stars

Sennett, N., Shao, L., & Steinhoff, J. (2017). An effective action model of dynamically scalarizing binary neutron stars. Physical Review D, 96: 084019. doi:10.1103/PhysRevD.96.084019.

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Datensatz-Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-24F8-C Versions-Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-24F9-A
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 Urheber:
Sennett, Noah1, Autor              
Shao, Lijing1, Autor              
Steinhoff, Jan1, Autor              
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:1933290              

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Schlagwörter: General Relativity and Quantum Cosmology, gr-qc
 Zusammenfassung: Gravitational waves can be used to test general relativity (GR) in the highly dynamical strong-field regime. Scalar-tensor theories of gravity are natural alternatives to GR that can manifest nonperturbative phenomena in neutron stars (NSs). One such phenomenon, known as dynamical scalarization, occurs in coalescing binary NS systems. Ground-based gravitational-wave detectors may be sensitive to this effect, and thus could potentially further constrain scalar-tensor theories. This type of analysis requires waveform models of dynamically scalarizing systems; in this work we devise an analytic model of dynamical scalarization using an effective action approach. For the first time, we compute the Newtonian-order Hamiltonian describing the dynamics of a dynamically scalarizing binary in a self-consistent manner. Despite only working to leading order, the model accurately predicts the frequency at which dynamical scalarization occurs. In conjunction with Landau theory, our model allows one to definitively establish dynamical scalarization as a second-order phase transition. We also connect dynamical scalarization to the related phenomena of spontaneous scalarization and induced scalarization; these phenomena are naturally encompassed into our effective action approach.

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 Datum: 2017-08-282017-10-092017
 Publikationsstatus: Im Druck publiziert
 Seiten: Updated to match published version
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 Identifikatoren: arXiv: 1708.08285
DOI: 10.1103/PhysRevD.96.084019
URI: http://arxiv.org/abs/1708.08285
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Titel: Physical Review D
  Andere : Phys. Rev. D.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Lancaster, Pa. : American Physical Society
Seiten: - Band / Heft: 96 Artikelnummer: 084019 Start- / Endseite: - Identifikator: ISSN: 0556-2821
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/111088197762258