Testing properties of the Galactic center black hole using stellar orbits

@article{Merritt2010TestingPO,
  title={Testing properties of the Galactic center black hole using stellar orbits},
  author={David Merritt and Tal Alexander and Seppo Mikkola and Clifford M. Will},
  journal={Physical Review D},
  year={2010},
  volume={81},
  pages={062002}
}
The spin and quadrupole moment of the supermassive black hole at the Galactic center can in principle be measured via astrometric monitoring of stars orbiting at milliparsec distances, allowing tests of general relativistic 'no-hair'theorems. One complicating factor is the presence of perturbations from other stars, which may induce orbital precession of the same order of magnitude as that due to general relativistic effects. The expected number of stars in this region is small enough that full… 

Figures and Tables from this paper

Testing the black hole no-hair theorem at the galactic center: perturbing effects of stars in the surrounding cluster
Observations of the precessing orbits of stars very near the massive black hole in the galactic center could provide measurements of the spin and quadrupole moment of the hole and thereby test the
Star Clusters and Dark Matter as Probes of the Spacetime Geometry of Massive Black Holes
This thesis includes two main projects. In the first part, we assess the feasibility of a recently suggested strong-field general relativity test, in which future observations of a hypothetical class
Testing the black hole no-hair theorem with Galactic Center stellar orbits
Theoretical investigations have provided proof-of-principle calculations suggesting measurements of stellar or pulsar orbits near the Galactic Center could strongly constrain the properties of the
Investigating the Relativistic Motion of the Stars Near the Supermassive Black Hole in the Galactic Center
The S-star cluster in the Galactic center allows us to study the physics close to a supermassive black hole, including distinctive dynamical tests of general relativity. Our best estimates for the
ON THE NEWTONIAN AND SPIN-INDUCED PERTURBATIONS FELT BY THE STARS ORBITING AROUND THE MASSIVE BLACK HOLE IN THE GALACTIC CENTER
The S-stars discovered in the Galactic center are expected to provide unique dynamical tests of the Kerr metric of the massive black hole (MBH) that they orbit. In order to obtain unbiased
Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center.
TLDR
This analysis provides the first fully self-consistent test of the gravitational theory using orbital dynamic in a strong gravitational regime, that of a supermassive black hole, which can be used to constrain various gravitational and astrophysical theories.
Stellar rotation as a new observable to test general relativity in the Galactic Center
S-stars in the Galactic Center are excellent testbeds of various general relativistic effects. While previous works focus on modeling their orbital motion around Sgr A*--the supermassive black hole
Periastron shift of compact stellar orbits from general relativistic and tidal distortion effects near Sgr A*
The Galactic Centre (Sgr A*), hosting a supermassive black hole, carries sufficient potential for testing gravitational theories. Existing astrometric facilities on Very Large Telescope (VLT) and
Towards relativistic orbit fitting of Galactic center stars and pulsars
The S stars orbiting the Galactic center black hole reach speeds of up to a few percent the speed of light during pericenter passage. This makes, for example, S2 at pericenter much more relativistic
RELATIVITY AND THE EVOLUTION OF THE GALACTIC CENTER S-STAR ORBITS
We consider the orbital evolution of the S-stars, the young main-sequence stars near the supermassive black hole (SBH) at the Galactic center, and put constraints on competing models for their
...
...

References

SHOWING 1-10 OF 125 REFERENCES
The Distribution of Stars near the Supermassive Black Hole in the Galactic Center
We analyze three sets of infrared star counts in the inner ~0.5 pc of the Galactic center. We perform statistical tests on the star counts and model in detail the extinction field and the effects of
Stellar Dynamics at the Galactic Center with an Extremely Large Telescope
We discuss physical experiments achievable via the monitoring of stellar dynamics near the massive black hole at the Galactic center with a diffraction-limited, next-generation, extremely large
Stellar Remnants in Galactic Nuclei: Mass Segregation
The study of how stars distribute themselves around a massive black hole (MBH) in the center of a galaxy is an important prerequisite for the understanding of many galactic-center processes. These
Testing the General Relativistic “No-Hair” Theorems Using the Galactic Center Black Hole Sagittarius A*
If a class of stars orbits the central black hole in our galaxy in short-period (~0.1 yr), high-eccentricity (~0.9) orbits, they will experience precessions of their orbital planes induced by both
The Stellar Cusp around the Supermassive Black Hole in the Galactic Center
We analyze deep near-IR adaptive optics imaging (taken with NAOS/CONICA on the Very Large Telescope at the European Southern Observatory, Chile), as well as new proper-motion data of the nuclear star
Periastron shifts of stellar orbits near the Galactic Center
The presence of a $2.9\pm0.4$ million solar mass object in the central stellar cluster of the Milky Way has recently been demonstrated via measurements of the stellar proper motions and radial
MONITORING STELLAR ORBITS AROUND THE MASSIVE BLACK HOLE IN THE GALACTIC CENTER
We present the results of 16 years of monitoring stellar orbits around the massive black hole in the center of the Milky Way, using high-resolution near-infrared techniques. This work refines our
ON POST-NEWTONIAN ORBITS AND THE GALACTIC-CENTER STARS
Stars near the Galactic center reach a few percent of light speed during pericenter passage, which makes post-Newtonian effects potentially detectable. We formulate the orbit equations in Hamiltonian
Near-infrared flares from accreting gas around the supermassive black hole at the Galactic Centre
TLDR
High-resolution infrared observations of Sagittarius A* reveal ‘quiescent’ emission and several flares, and traces very energetic electrons or moderately hot gas within the innermost accretion region.
The Effect of Mass Segregation on Gravitational Wave Sources near Massive Black Holes
Gravitational waves (GWs) from the inspiral of compact remnants (CRs) into massive black holes (MBHs) will be observable to cosmological distances. While a CR spirals in, two-body scattering by field
...
...