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Universal Relations for Binary Neutron Star Mergers with Long-lived Remnants

Af: Praveen Manoharan Engelsk Paperback
SPAR
kr 134

Universal Relations for Binary Neutron Star Mergers with Long-lived Remnants

Af: Praveen Manoharan Engelsk Paperback
In the last 25 years, an extensive body of work has developed various equation of state independent - or (approximately) universal - relations that allow for the inference of neutron star parameters from gravitational wave observations. These works, however, have mostly been focused on singular neutron stars, while our observational efforts at the present, and in the near future, will be focused on binary neutron star (BNS) mergers. In light of these circumstances, the last five years have also given rise to more attempts at developing universal relations that relate BNS pre-merger neutron stars to stellar parameters of the post-merger object, mostly driven by numerical relativity simulations. In this thesis a first attempt at perturbatively deriving universal relations for binary neutron star mergers with long-lived neutron star remnants is presented. The author succeeds in confirming previous results relating pre-merger binary tidal deformabilities to the f-mode frequency of the post-merger object. Combining this result with recent advances of computing the f-mode frequency of fast rotating neutron stars, he also derives a combined relation that relates the pre-merger binary tidal deformability of a BNS to the effective compactness of a long-lived neutron star remnant. Finally, he also proposes a direct relation between these quantities with improved accuracy. 
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In the last 25 years, an extensive body of work has developed various equation of state independent - or (approximately) universal - relations that allow for the inference of neutron star parameters from gravitational wave observations. These works, however, have mostly been focused on singular neutron stars, while our observational efforts at the present, and in the near future, will be focused on binary neutron star (BNS) mergers. In light of these circumstances, the last five years have also given rise to more attempts at developing universal relations that relate BNS pre-merger neutron stars to stellar parameters of the post-merger object, mostly driven by numerical relativity simulations. In this thesis a first attempt at perturbatively deriving universal relations for binary neutron star mergers with long-lived neutron star remnants is presented. The author succeeds in confirming previous results relating pre-merger binary tidal deformabilities to the f-mode frequency of the post-merger object. Combining this result with recent advances of computing the f-mode frequency of fast rotating neutron stars, he also derives a combined relation that relates the pre-merger binary tidal deformability of a BNS to the effective compactness of a long-lived neutron star remnant. Finally, he also proposes a direct relation between these quantities with improved accuracy. 
Produktdetaljer
Sprog: Engelsk
Sider: 65
ISBN-13: 9783658368401
Indbinding: Paperback
Udgave:
ISBN-10: 3658368403
Kategori: Astrofysik
Udg. Dato: 29 mar 2022
Længde: 0mm
Bredde: 210mm
Højde: 148mm
Forlag: Springer Fachmedien Wiesbaden
Oplagsdato: 29 mar 2022
Forfatter(e): Praveen Manoharan
Forfatter(e) Praveen Manoharan


Kategori Astrofysik


Sprog Engelsk


Indbinding Paperback


Sider 65


Udgave


Længde 0mm


Bredde 210mm


Højde 148mm


Udg. Dato 29 mar 2022


Oplagsdato 29 mar 2022

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