scholarly journals Black hole scalarization with Gauss-Bonnet and Ricci scalar couplings

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
Georgios Antoniou ◽  
Antoine Lehébel ◽  
Giulia Ventagli ◽  
Thomas P. Sotiriou
Keyword(s):  
Black Hole ◽  
Ricci Scalar ◽  
Scalar Couplings

scholarly journals Neutron star scalarization with Gauss-Bonnet and Ricci scalar couplings

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Giulia Ventagli ◽  
Georgios Antoniou ◽  
Antoine Lehébel ◽  
Thomas P. Sotiriou
Keyword(s):  
Neutron Star ◽  
Ricci Scalar ◽  
Scalar Couplings

scholarly journals Thermodynamic metric of deformed Schwarzschild black holes

2017 ◽  
Vol 26 (10) ◽  
pp. 1750106 ◽  
Author(s):  
Wen-Yu Wen
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Degrees Of Freedom ◽  
Degree Of Freedom ◽  
Ricci Scalar ◽  
Renyi Entropy ◽  
Schwarzschild Black Hole ◽  
Additional Degree ◽  
Regular Black Holes ◽  
Gauge Fixing

Thermodynamic metric usually works only for those black holes with more than one conserved charge, thereby excluding the Schwarzschild black hole. In this paper, however, different versions of thermodynamic metric are computed and compared for the Schwarzschild-like black hole by introducing new degrees of freedom. These new degrees of freedom have two purposes. First, the deformed metric may be treated offshell to the ordinary Schwarzschild black hole, and onshell physics corresponds to the submanifold by gauge fixing of this additional degree of freedom. In particular, the thermal Ricci scalar for the Schwarzschild black hole, though different for various deformations, can be obtained by switching off the deformation. Second, while deformed metric is treated onshell, a divergent Ricci scalar may signal an exotic phase in which new physical degrees of freedom manifest. This paper considers the new degree of freedom as the running Newton constant, a cutoff scale for regular black holes, a noncommutative deformation or the deformed parameter in the nonextensive Tsallis–Rènyi entropy.

Gravitational-wave astronomers detect hints of largest black-hole merger yet

Nature ◽  
2018 ◽  
Author(s):  
Davide Castelvecchi
Keyword(s):  
Black Hole ◽  
Gravitational Wave

The first-ever image of a black hole is now a movie

Nature ◽  
2020 ◽  
Vol 586 (7827) ◽  
pp. 18-19
Author(s):  
Davide Castelvecchi
Keyword(s):  
Black Hole

Primordial black hole searches called off

Nature ◽  
2014 ◽  
Author(s):  
Eugenie Samuel Reich
Keyword(s):  
Black Hole ◽  
Primordial Black Hole

Star orbit nails black hole

Nature ◽  
2002 ◽  
Author(s):  
Philip Ball
Keyword(s):  
Black Hole

If a black hole spins, it is heavier

Nature India ◽  
2013 ◽  
Keyword(s):  
Black Hole
Sign in / Sign up

Export Citation Format

Share Document