The Milky Way nuclear star cluster

The Milky Way nuclear star cluster

CO absorption line map of radial velocity. The coordinates are centred on Sgr A* and along the Galactic plane. The plus sign marks the position of Sgr A*. The velocity is in the local standard of rest, Galactic North is up, Galactic East is left.

Field of view and spatial distribution of early-type stars in the Milky Way nuclear star cluster. The black box shows the
KMOS 2.51 pc × 1.68 pc. The black cross shows the position of Sgr A*. The underlying image is from HST/NICMOS (Dong et al. 2011), aligned along Galactic coordinates. Yellow diamond symbols denote confirmed Wolf-Rayet (WR) and emission-line stars, cyan squares are stars with featureless spectra, green circles denote O/B stars. Red x-symbols indicate new young star candidates, blue plus-symbols probable foreground stars.

Anja studies the stellar kinematics of the Milky Way nuclear star cluster in integrated light towards the half-light radius (4.2pc). She runs axisymmetric Jeans models and triaxial Schwarzschild models to understand the large-scale kinematics of the Milky Way nuclear star cluster.
Anja uses near-infrared K-band spectroscopy obtained with KMOS (VLT) of single resolved stars to study the star formation history of the Milky Way nuclear star cluster. The data extends to a larger spatial scale than previous stellar populations studies of the Galactic centre.

For more details contact Anja Feldmeier-Krause.

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