Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-22T05:11:26.058Z Has data issue: false hasContentIssue false
  • English
  • Français

Using Gaia as an Astrometric Tool for Deep Ground-based Surveys

Published online by Cambridge University Press:  07 March 2018

Dana I. Casetti-Dinescu Open the ORCID record for Dana I. Casetti-Dinescu [Opens in a new window] ,
Terrence M. Girard  and
Michael Schriefer
Dana I. Casetti-Dinescu
Affiliation:
Southern Connecticut State University, 501 Crescent Street, New Haven, CT, USA email: [email protected]
Terrence M. Girard
Affiliation:
14 Dunn Road, Hamden, CT 06518, USA email: [email protected]
Michael Schriefer
Affiliation:
Southern Connecticut State University, 501 Crescent Street, New Haven, CT, USA email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Gaia DR1 positions are used to astrometrically calibrate three epochs’ worth of Subaru SuprimeCam images in the fields of globular cluster NGC 2419 and the Sextans dwarf spheroidal galaxy. Distortion-correction “maps” are constructed from a combination of offset dithers and reference to Gaia DR1. These are used to derive absolute proper motions in the field of NGC 2419. Notably, we identify the photometrically-detected Monoceros structure in the foreground of NGC 2419 as a kinematically-cold population of stars, distinct from Galactic-field stars. This project demonstrates the feasibility of combining Gaia with deep, ground-based surveys, thus extending high-quality astrometry to magnitudes beyond the limits of Gaia.

Keywords

astrometryGalaxy: kinematics and dynamicsgalaxies: dwarf
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 85 - 87
Copyright
Copyright © International Astronomical Union 2018 

References

Carballo-Bello, J. A., Munõz, R. R., Carlin, J. L., Côté, P., Geha, M., Simon, J. D., & Djorgovski, S. G. ApJ, 805, 51 CrossRefGoogle Scholar
Gaia Collaboration et al., 2016, A&A, 595, 1 Google Scholar