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Axisymmetric Schwarzschild models of an isothermal axisymmetric mock dwarf spheroidal galaxy
Jorrit H. J. Hagen, Amina Helmi, Maarten A. Breddels
We test the ability of Schwarzschild's orbit superposition method in measuring the mass content, scale radius and shape of a flattened dwarf spheroidal galaxy. Until now, most dyna…
Gaia Data Release 2. Summary of the contents and survey properties
Gaia Collaboration, A. G. A. Brown, A. Vallenari +4
We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources…
Gaia Data Release 2: Catalogue validation
F. Arenou, X. Luri, C. Babusiaux +36
The second Gaia data release (DR2), contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions,…
Leaves on trees: identifying halo stars with extreme gradient boosted trees
Jovan Veljanoski, Amina Helmi, Maarten Breddels +1
Extended stellar haloes are a natural by-product of the hierarchical formation of massive galaxies. If merging is a non-negligible factor in the growth of our Galaxy, evidence of s…
What can Gaia proper motions tell us about Milky Way dwarf galaxies?
Shoko Jin, Amina Helmi, Maarten Breddels
We present a proper-motion study on models of the dwarf spheroidal galaxy Sculptor, based on the predicted proper-motion accuracy of Gaia measurements. Gaia will measure proper mot…