2018
DOI: 10.1051/0004-6361/201833051
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Abstract: Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude 21. In addition epoch astrometry and photometry are provided for a modest sample of minor planets in the solar system. Aims. A summary of the contents of Gaia DR2 is presented, accompanied by a discussion on the differences with respect to Gaia DR1 and an overview of the main limitations which are st… Show more

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Cited by 6,946 publications
(1,717 citation statements)
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“…The Gaia DR2 provides trigonometric parallaxes with mean parallax error up to 0.04 mas for sources having G ≤ 15 mag and around 0.7 mas for sources having G = 20 mag. The DR2 provides proper motions of more than 1.3 billions sources with uncertainties up to 0.06 mas yr −1 for the sources having G < 15 mag, 0.2 mas yr −1 for G = 17 mag, and 1.2 mas yr −1 for sources upto G = 20 mag (Gaia Collaboration et al 2018). In the following analysis, we use the Gaia proper motions and parallaxes to identify the cluster member stars in order to determine various cluster parameters.…”
Section: Archived Datamentioning
confidence: 99%
“…The Gaia DR2 provides trigonometric parallaxes with mean parallax error up to 0.04 mas for sources having G ≤ 15 mag and around 0.7 mas for sources having G = 20 mag. The DR2 provides proper motions of more than 1.3 billions sources with uncertainties up to 0.06 mas yr −1 for the sources having G < 15 mag, 0.2 mas yr −1 for G = 17 mag, and 1.2 mas yr −1 for sources upto G = 20 mag (Gaia Collaboration et al 2018). In the following analysis, we use the Gaia proper motions and parallaxes to identify the cluster member stars in order to determine various cluster parameters.…”
Section: Archived Datamentioning
confidence: 99%
“…The VVV Infrared Astrometric Catalogue (VIRAC) (Smith et al 2018, hereafter S18) has provided a total of ∼175 000 000 proper motion measurements across the Galactic bulge region, (−10 < l/deg < 10, −10 < b/deg < 5). Combined with data from Gaia (Gaia Collaboration et al 2018a) to provide an absolute reference frame, these data offer an unprecedented opportunity to study the 3D proper motion structure of the MW bulge. The goal of this paper is to derive LOS integrated and distance-resolved maps of mean proper motions and dispersions from the VIRAC data and use a dynamical model to aid in their interpretation.…”
Section: Introductionmentioning
confidence: 99%
“…Yong et al 2004;Bensby et al 2014). Angular diameters offer a direct approach to determining T eff when combined with precision flux measurements, such as those readily available from the Hipparcos-Tycho (Høg et al 2000), Gaia (Gaia Collaboration et al 2016;Brown et al 2018), and WISE (Wright et al 2010) space missions.…”
Section: Introductionmentioning
confidence: 99%