S62 and S4711: Indications of a Population of Faint Fast-moving Stars inside the S2 Orbit—S4711 on a 7.6 yr Orbit around Sgr A*

@article{Peiker2020S62AS,
  title={S62 and S4711: Indications of a Population of Faint Fast-moving Stars inside the S2 Orbit—S4711 on a 7.6 yr Orbit around Sgr A*},
  author={Florian Pei{\ss}ker and Andreas Eckart and Michal Zaja{\vc}ek and Basel Ali and Marzieh Parsa},
  journal={The Astrophysical Journal},
  year={2020},
  volume={899}
}
We present high-pass filtered NACO and SINFONI images of the newly discovered stars S4711–S4715 between 2004 and 2016. Our deep H+K-band (SINFONI) and K-band (NACO) data show the S-cluster star S4711 on a highly eccentric trajectory around Sgr A* with an orbital period of 7.6 yr and a periapse distance of 144 au to the supermassive black hole (SMBH). S4711 is hereby the star with the shortest orbital period and the smallest mean distance to the SMBH during its orbit to date. The used high-pass… 

Observation of S4716—a Star with a 4 yr Orbit around Sgr A*

The ongoing monitoring of the Galactic center and Sgr A*, the central supermassive black hole, produces surprising and unexpected findings. This goes hand in hand with the technical evolution of

The Short-period S-stars S4711, S62, S4714 and the Lense–Thirring Effect due to the Spin of Sgr A*

  • L. Iorio
  • Physics
    The Astrophysical Journal
  • 2020
Recently, some S-stars (S4711, S62, S4714) orbiting the supermassive black hole (SMBH) in Sgr A* with short orbital periods (7.6 yr ≤ Pb ≤ 12 yr) were discovered. It was suggested that they may be

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