On the maximum mass and oblateness of rotating neutron stars with generic equations of state

  • A considerable effort has been dedicated recently to the construction of generic equations of state (EOSs) for matter in neutron stars. The advantage of these approaches is that they can provide model-independent information on the interior structure and global properties of neutron stars. Making use of more than 106 generic EOSs, we assess the validity of quasi-universal relations of neutron-star properties for a broad range of rotation rates, from slow rotation up to the mass-shedding limit. In this way, we are able to determine with unprecedented accuracy the quasi-universal maximum-mass ratio between rotating and nonrotating stars and reveal the existence of a new relation for the surface oblateness, i.e., the ratio between the polar and equatorial proper radii. We discuss the impact that our findings have on the imminent detection of new binary neutron-star mergers and how they can be used to set new and more stringent limits on the maximum mass of nonrotating neutron stars, as well as to improve the modeling of the X-ray emission from the surface of rotating stars.

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Metadaten
Author:Carlo MusolinoORCiD, Christian EckerORCiD, Luciano RezzollaORCiDGND
URN:urn:nbn:de:hebis:30:3-843972
DOI:https://doi.org/10.3847/1538-4357/ad1758
ISSN:1538-4357
Parent Title (English):The astrophysical journal
Publisher:Institute of Physics
Place of publication:London
Document Type:Article
Language:English
Date of Publication (online):2024/02/10
Date of first Publication:2024/02/10
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2024/05/02
Volume:962
Issue:61
Article Number:61
Page Number:9
HeBIS-PPN:521018234
Institutes:Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International