Observational discrimination of Eddington-inspired Born-Infeld gravity from general relativity

• 祖谷, 元

抄録

Direct observations of neutron stars could tell us an imprint of modified gravity. However, it is generally difficult to resolve the degeneracy due to the uncertainties in the equation of state of neutron star matter and in gravitational theories. In this paper, we have successfully found the observational possibility to distinguish Eddington-inspired Born-Infeld gravity (EiBI) from general relativity. We show that the radii of neutron stars with 0.5M⊙ are strongly correlated with the neutron skin thickness of {208}Pb independently of the equation of state, while this correlation depends on the coupling constant in EiBI. As a result, via the direct observations of the radius of the neutron star with 0.5M⊙ and the measurements of a neutron skin thickness of {208}Pb by the terrestrial experiments, one could not only discriminate EiBI from general relativity but also estimate the coupling constant in EiBI.

収録刊行物

• Physical Review D

  Physical Review D 89 (10), 2014-05-02

  American Physical Society

詳細情報

• CRID: 1050001335794094080
• NII論文ID: 120005439537
• NII書誌ID: AA00773624
• ISSN: 15507998
• HANDLE: 2433/187791
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles