Constraint on energy-momentum squared gravity from neutron stars and its cosmological implications
Accepted version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Akarsu, Ö
Barrow, JD
Çlklntoǧlu, S
Ekşi, KY
Katlrcl, N
Abstract
Deviations from the predictions of general relativity due to energy-momentum squared gravity (EMSG) are expected to become pronounced in the high density cores of neutron stars. We derive the hydrostatic equilibrium equations in EMSG and solve them numerically to obtain the neutron star mass-radius relations for four different realistic equations of state. We use the existing observational measurements of the masses and radii of neutron stars to constrain the free parameter, alpha; that characterizes the coupling between matter and spacetime in EMSG.
Description
Keywords
5107 Particle and High Energy Physics, 5101 Astronomical Sciences, 51 Physical Sciences
Journal Title
Physical Review D
Conference Name
Journal ISSN
2470-0010
2470-0029
2470-0029
Volume Title
97
Publisher
American Physical Society (APS)
Publisher DOI
Sponsorship
Science and Technology Facilities Council (ST/P000673/1)
Science and Technology Facilities Council (ST/L000636/1)
Science and Technology Facilities Council (ST/L000636/1)
STFC