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  • NAM2019
    • Registration
    • Key Dates & Outline Schedule
    • Practical Information
    • Exhibitors
    • Grants & Bursaries
    • Contacts
  • Science
    • Science Programme
    • Parallel Sessions
    • Plenary Talks
    • Community Session
    • Special Lunches
    • Posters
    • Presenter Guidelines
  • Social
    • What's On
    • Welcome Reception
    • RAS Awards Dinner
  • Media
  • Outreach
    • Outreach and Education Day
    • Fringe Event
    • School Visit Day
  • Lancaster
    • Travel
    • Accommodation
    • Childcare
    • Campus Map
    • About Lancaster
    • Code of Conduct

Poster

id
Precise photo-astrometric distances, extinctions, and stellar parameters for 150 million stars in Gaia DR2
Gaia
Friedrich
Anders
Date Submitted
2019-03-14 10:51:27
University of Barcelona
F. Anders, A. Khalatyan, C. Chiappini, A. Queiroz, C. Jordi
Combining the precise parallaxes and optical photometry delivered by Gaia's second data release (DR2) with the photometric catalogues of Pan-STARRS1, 2MASS, and AllWISE, we compute Bayesian distances, extinctions, and stellar parameters (effective temperatures, gravities, metallicities, and masses) for stars brighter than G=18. Because of the wide wavelength range used, our results substantially improve the accuracy and precision of the Gaia DPAC results using Gaia DR2 alone. We achieve a median precision of 6% in distance and 0.17 mag in V-band extinction at G=14, degrading towards fainter magnitudes (15% and 0.20 mag at G=16; 30% and 0.25 mag at G=17). The results are carefully evaluated and flagged, and will be released through the ADQL query interface of the Gaia mirror at AIP (gaia.aip.de), and temporarily as binary tables. As first applications, we provide extinction maps as a function of distance, distance- and extinction-corrected colour-magnitude diagrams, and extensive kinematic maps of the Galaxy. Our results also serve to assess targeting strategies of the future 4MOST spectroscopic surveys. The produced catalogue may potentially be of interest for a number of existing and future projects within the institute.

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