Constraining brans-dicke gravity with accreting millisecond pulsars in ultracompact binaries

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The five accreting, millisecond X-ray pulsars in ultracompact binaries that were recently discovered with the Rossi X-Ray Timing Explorer provide excellent candidates for constraining the deviations from general relativity described by the Brans-Dicke parameter ωBD. I calculate the expected rate of change of the orbital periods of these binaries and discuss the prospects of constraining ωBD to values that can be as stringent as current solar system constraints. Finally, I show how measurements of the orbital period derivative in ultracompact binaries can be used to place lower bounds on their orbital inclinations.

Original languageEnglish (US)
Pages (from-to)1282-1287
Number of pages6
JournalAstrophysical Journal
Volume688
Issue number2
DOIs
StatePublished - Dec 1 2008

Fingerprint

pulsars
gravity
gravitation
orbitals
solar system
X Ray Timing Explorer
inclination
relativity
deviation
x rays
parameter
rate

Keywords

  • Gravitation
  • Relativity
  • X-rays: Binaries

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Constraining brans-dicke gravity with accreting millisecond pulsars in ultracompact binaries. / Psaltis, Dimitrios.

In: Astrophysical Journal, Vol. 688, No. 2, 01.12.2008, p. 1282-1287.

Research output: Contribution to journalArticle

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