TY - JOUR
T1 - Dark energy interactions near the Galactic Center
AU - Benisty, David
AU - Davis, Anne Christine
N1 - Funding Information:
We thank Wyn Evans, Eduardo I. Guendelman, Salvatore Cappoziello, and Philippe Brax for discussions and insightful comments. D. B. gratefully acknowledges the support from the Blavatnik and the Rothschild fellowships. We have received partial support from European COST actions CA15117 and CA18108 and STFC consolidated Grants No. ST/P0006811 and No. ST/T0006941.
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/1/15
Y1 - 2022/1/15
N2 - We investigate scalar-tensor theories, motivated by dark energy models, in the strong gravity regime around the black hole at the center of our galaxy. In such theories general relativity is modified since the scalar field couples to matter. We consider the most general conformal and disformal couplings of the scalar field to matter to study the orbital behavior of the nearby stars around the galactic star center SgrA∗. Markov chain Monte Carlo simulation yields a bound on the parameters of the couplings of the scalar field to matter. Using Bayesian analysis yields the first constraints on such theories in the strong gravity regime.
AB - We investigate scalar-tensor theories, motivated by dark energy models, in the strong gravity regime around the black hole at the center of our galaxy. In such theories general relativity is modified since the scalar field couples to matter. We consider the most general conformal and disformal couplings of the scalar field to matter to study the orbital behavior of the nearby stars around the galactic star center SgrA∗. Markov chain Monte Carlo simulation yields a bound on the parameters of the couplings of the scalar field to matter. Using Bayesian analysis yields the first constraints on such theories in the strong gravity regime.
UR - http://www.scopus.com/inward/record.url?scp=85123926015&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.105.024052
DO - 10.1103/PhysRevD.105.024052
M3 - Article
AN - SCOPUS:85123926015
VL - 105
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 2
M1 - 024052
ER -