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Astrophysics Luncheon Seminar

Synergies Between Gaia and VLBI Astrometry
Presented by Luis‑Henry Quiroga Nunez
Leiden Observatory-JIVE

Monday, April 1, 2019
12:00 noon in 169-336

The Bar and Spiral Structure Legacy (BeSSeL) survey and the Bulge Asymmetries and Dynamical Evolution (BAaDE) project target maser stellar emission from young massive stars and evolved stars, respectively. Follow-up radio-astrometric measurements are complementary to Gaia results since the inner plane of the Galaxy is obscured at optical wavelengths. We are constructing a cross-match sample between Gaia sources and BAaDE targets. This resulting sample provides important clues on the intrinsic properties and population distribution of evolved stars in the Galactic plane, but especially at the Galactic Bulge. For the BeSSeL targets, which are heavily obscured, we are investigating whether they can be associated with clusters of massive young stars detectable at optical wavelengths, and how such can contribute to improving the accuracy of the fundamental Galactic parameters and the Galactic spiral structure distribution.

JPL Contact: David Ardila (4-1855)

SVCP Astrophysics

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