2018
DOI: 10.1093/mnras/sty2490
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Isochrone ages for ∼3 million stars with the second Gaia data release

Abstract: We present a catalogue of distances, masses and ages for ∼ 3 million stars in the second Gaia data release with spectroscopic parameters available from the large spectroscopic surveys: APOGEE, Gaia-ESO, GALAH, LAMOST, RAVE and SEGUE. We use a Bayesian framework to characterise the probability density functions of distance, mass and age using photometric, spectroscopic and astrometric information, supplemented with spectroscopic masses where available for giant stars. Furthermore, we provide posterior extinctio… Show more

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Cited by 153 publications
(244 citation statements)
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References 105 publications
(160 reference statements)
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“…As described in Section 2, our simulation self-consistently evolves as an isolated Figure 1. Left column shows the MW stars with 0.5 < |z|/kpc < 3 from Sanders & Das (2018). The simulation panels are for stars with 5 < R/kpc < 11 and |z| < 3 kpc, see details in the text.…”
Section: Resultsmentioning
confidence: 99%
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“…As described in Section 2, our simulation self-consistently evolves as an isolated Figure 1. Left column shows the MW stars with 0.5 < |z|/kpc < 3 from Sanders & Das (2018). The simulation panels are for stars with 5 < R/kpc < 11 and |z| < 3 kpc, see details in the text.…”
Section: Resultsmentioning
confidence: 99%
“…We also note, by analysing the simulation snapshots, that this old population is already kinematically hot in the first 3 Gyrs of the simulation. Therefore, internal dynamical heating in a MW-like galaxy is enough to heat the primordial disk in its early stages and produce 7 We select stars in Sanders & Das (2018) with estimated age error lower than 2 Gyrs.…”
Section: The Age Of Simulated Splash Starsmentioning
confidence: 99%
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“…Here A S is taken from Schlegel et al (1998). We furthermore force the sampled parallax (ω sample ) to be positive.…”
Section: Age Determinationmentioning
confidence: 99%
“…However they often have only relatively small samples of stars (up to ∼ 10 3 stars, e.g., Adibekyan et al 2012;Haywood et al 2013), and usually do not account for their heterogeneous selection effects. Only very recently has isochrone ages of large samples of stars (∼ 10 5 stars) become available (e.g., Mints & Hekker 2018;Queiroz et al 2018;Sanders & Das 2018), this is coupled with the data releases of large scale spectroscopic surveys such as GALAH (De Silva et al 2015;Buder et al 2018), LAMOST (Luo et al 2015), APOGEE (Holtzman et al 2015), Gaia-ESO (Gilmore et al 2012) and parallax information from Gaia (Gaia Collaboration et al 2018). The large number of stars covered by these surveys make separation of different galactic components and populations more achievable.…”
Section: Introductionmentioning
confidence: 99%