Stellar surveys

My group plays key roles in several large-scale observational programs: the Gaia-ESO survey, the upcoming 4MOST, PLATO, WEAVE, and MSE projects.

The Gaia-ESO (2013 - 2018) survey on the 8-meter Very Large Telescope (VLT) was the first large high-resolution survey to systematically map all stellar populations of our Galaxy. The survey had a revolutionary impact on Galactic science, from stellar physics and clusters, to evolution of the disk and halo sub-structure.

In 4MOST, I co-lead the high-resolution survey of the Milky Way Disk and Bulge (4MIDABLE-HR). High-resolution (R = 20,000) broad-band spectra will be derived for over two million Gaia stars with G-band magnitudes, 8 < G < 18. Almost 0.5 million stars overlap with the TESS input catalogue. These data will provide a treasure trove for high-precision stellar physics, in particular for s- and r-process elements, and they will support the exploration of Galactic structure and evolution.

Maunakea Spectroscopic Explorer (MSE) is a wide-area multi-object instrument (~2025). I am leading the Science Workgroup on Exoplanets and Stellar physics. MSE will provide massive spectroscopic follow-up for millions of stars observed by TESS, Plato, Gaia, and eROSITA, revolutionising our understanding of stellar interiors, binary population and evolution of stars in multiple systems, white dwarfs and accretion of planetesimals, diversity of exoplanets, properties of exoplanet hosts, and habitability. 

Figure to the left shows the potential depth of MSE for studies of open clusters (courtesy Jan Rybizki).

© Maria Bergemann 2023