The DR14 APOGEE-TGAS catalogue: Precise chemo-kinematics in the extended solar vicinity

Abstract

We describe the DR14 APOGEE-TGAS catalogue, a new SDSS value-added catalogue that provides precise astrophysical parameters, chemical abundances, astro-spectro-photometric distances and extinctions, as well as orbital parameters for ∼ 30, 000 APOGEE-TGAS stars, among them ∼ 5, 000 high-quality giant stars within 1 kpc.

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment

“…FernandezTrincado et al 2018, in preparation). For more details, see F. Anders et al (2018, in preparation); a summary is also provided in Anders et al (2017).…”

All-sky visible and near infrared space astrometry

“…Dwarf spheroidal galaxies (dSph) are fascinating systems and likely fossils of the re-ionisation epoch 5 In order to study their internal proper motions there is a need to disentangle the Milky Way environment using very accurate proper motion measurements. The dSphs are small, almost spherical, agglomerates of stars that orbit more massive hosts.…”

“…Distances of stars are needed not only to derive their 3D location but to derive tangential velocities from proper motions as well. Distances may be obtained from the Gaia parallaxes, but they must be supplemented by photometric-spectroscopic distances for remote stars ( [5,6,61,157], etc). The latter method will be much strengthened through calibration with accurate trigonometric distances from Gaia which will provide, e.g., better than 1 percent accuracy for 10 million stars, most of these will be dwarfs.…”

“…Discrepancy between observed dark matter density of low-mass galaxies and density profiles predicted by cosmological N-body simulations 5. This paragraph is extracted from an unpublished note from Rodrigo Ibata.…”