TY - JOUR
T1 - Binary X-ray Sources in Massive Brans–Dicke Gravity
AU - Panotopoulos, Grigoris
AU - Rincón, Ángel
AU - Lopes, Ilídio
N1 - Funding Information:
Acknowledgments: The authors G. P. and I. Lopes thank the Fundação para a Ciência e Tecnologia (FCT), Portugal, for the financial support to the Center for Astrophysics and Gravitation-CENTRA, Instituto Superior Técnico, Universidade de Lisboa, through project UIDB/00099/2020 and grant number PTDC/FIS-AST/28920/2017. The author A. R. acknowledges the University of Tarapacá for support.
Funding Information:
The authors G. P. and I. Lopes thank the Fundação para a Ciência e Tecnologia (FCT), Portugal, for the financial support to the Center for Astrophysics and Gravitation-CENTRA, Instituto Superior Técnico, Universidade de Lisboa, through project UIDB/00099/2020 and grant number PTDC/FIS-AST/28920/2017. The author A. R. acknowledges the University of Tarapacá for support.
Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/5
Y1 - 2022/5
N2 - This study focuses on the X-ray emission of low-mass black hole binaries in massive Brans– Dicke gravity. First, we compute the accretion disk with the well-known Shakura–Sunyaev model for an optically thick, cool, and geometrically thin disk. Moreover, we assume that the gravitational field generated by the stellar-mass black hole is an analogue of the Schwarzschild space-time of Einstein’s theory in massive Brans–Dicke gravity. We compute the most relevant quantities of interest, i.e., (i) the radial velocity, (ii) the energy and surface density, and (iii) the pressure as a function entirely of the radial coordinate. We also compute the soft spectral component of the X-ray emission produced by the disk. Furthermore, we investigate in detail how the mass of the scalar field modifies the properties of the binary as described by the more standard Schwarzschild solution.
AB - This study focuses on the X-ray emission of low-mass black hole binaries in massive Brans– Dicke gravity. First, we compute the accretion disk with the well-known Shakura–Sunyaev model for an optically thick, cool, and geometrically thin disk. Moreover, we assume that the gravitational field generated by the stellar-mass black hole is an analogue of the Schwarzschild space-time of Einstein’s theory in massive Brans–Dicke gravity. We compute the most relevant quantities of interest, i.e., (i) the radial velocity, (ii) the energy and surface density, and (iii) the pressure as a function entirely of the radial coordinate. We also compute the soft spectral component of the X-ray emission produced by the disk. Furthermore, we investigate in detail how the mass of the scalar field modifies the properties of the binary as described by the more standard Schwarzschild solution.
KW - accretion disk models
KW - modified gravity
KW - X-ray astrophysics
UR - http://www.scopus.com/inward/record.url?scp=85130868587&partnerID=8YFLogxK
U2 - 10.3390/universe8050285
DO - 10.3390/universe8050285
M3 - Article
AN - SCOPUS:85130868587
VL - 8
JO - Universe
JF - Universe
SN - 2218-1997
IS - 5
M1 - 285
ER -