ELSI

Research & Activities

ELSI Seminar

Galaxy modelling at the Gaia era

Speaker
Daisuke Kawata (Mullard Space Science Laboratoy, University College London)
Date
August 4, 2015
Time
15:30 - 17:00
Room

ELSI-2 Building - 104 ELSI-Lounge

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Abstract:

European Space Agency (ESA) launched Gaia satellite on 19th December 2013, to map the positions and velocities for about a billion of stars in the Milky Way with the unprecedented accuracies. Gaia is currently fully operational and started the nominal routine scanning phase for its 5 years of survey on 18 July 2014. The first early data release is expected in mid-2016, and the first all-sky astrometry data is planed to be released in 2017. There is no proprietary period for the data processing and analysis consortium, and the catalogue and data will be equally available for researches all over the world. One of the core-science goals of the Gaia mission is to understand the structures of the Milky Way. To be prepared for exploiting the Gaia data, we have developed a new Galaxy modelling tool, call PRIMAL, based on Made-to-Measure technique, to reconstruct the structures of the Milky Way disk. We apply PRIMAL to mock Gaia data created from the known target disk system, and demonstrate that PRIMAL can reproduce the structure and kinematics of the target, despite the complex selection function due to the Galactic extinction and the observational errors.