The Galactic Centre star S2 as a dynamical probe for intermediate-mass black holes

@article{Gualandris2010TheGC,
  title={The Galactic Centre star S2 as a dynamical probe for intermediate-mass black holes},
  author={Alessia Gualandris and Stefan Gillessen and David Merritt},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2010},
  volume={409},
  pages={1146-1154}
}
We study the short-term effects of an intermediate mass black hole (IBH) on the orbit of star S2 (S02), the shortest-period star known to orbit the supermassive black hole (MBH) in the centre of the Milky Way. Near-infrared imaging and spectroscopic observations allow an accurate determination of the orbit of the star. Given S2's short orbital period and large eccentricity, general relativity (GR) needs to be taken into account, and its effects are potentially measurable with current technology… Expand
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References

SHOWING 1-10 OF 33 REFERENCES
PERTURBATIONS OF INTERMEDIATE-MASS BLACK HOLES ON STELLAR ORBITS IN THE GALACTIC CENTER
We study the short- and long-term effects of an intermediate mass black hole (IMBH) on the orbits of stars bound to the supermassive black hole (SMBH) at the center of the Milky Way. A regularizedExpand
Intermediate-Mass Black Hole(s) and Stellar Orbits in the Galactic Center
Many young stars reside within the central half-parsec from Sgr A*, the supermassive black hole in the Galactic center. The origin of these stars remains a puzzle. Recently, Hansen & MilosavljevicExpand
A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way
TLDR
Ten years of high-resolution astrometric imaging allow us to trace two-thirds of the orbit of the star currently closest to the compact radio source (and massive black-hole candidate) Sagittarius A* and show that the star is on a bound, highly elliptical keplerian orbit around Sgr A*. Expand
The need for a second black hole at the Galactic center
Deep infra-red observations and long-term monitoring programs have provided dynamical evidence for a supermassive black hole of mass 3 × 10 6 M⊙ associated with the radio source Sagitarrius A ∗ atExpand
The First Measurement of Spectral Lines in a Short-Period Star Bound to the Galaxy’s Central Black Hole: A Paradox of Youth
We have obtained the first detection of spectral absorption lines in one of the high-velocity stars in the vicinity of the Galaxy's central supermassive black hole. Both Brγ (2.1661 μm) and He IExpand
EXPLAINING THE ORBITS OF THE GALACTIC CENTER S-STARS
The young stars near the supermassive black hole at the galactic center follow orbits that are nearly random in orientation and that have an approximately thermal distribution of eccentricities,Expand
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 ourExpand
Testing properties of the Galactic center black hole using stellar orbits
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 testsExpand
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 starExpand
Dynamical evolution of the young stars in the Galactic center
Recent observations of the Galactic center revealed a nuclear disk of young OB stars near the massive black hole (MBH), in addition to many similar outlying stars with higher eccentricities and/orExpand
...
1
2
3
4
...