How Far Away One Can Penetrate with Gaia in Star Cluster Studies?
How far away we can penetrate with Gaia in star clusters study? D.A.Kovaleva, INASAN, Moscow, Russia N.V.Kharchenko, MAO, Kiev, Ukraine A.E.Piskunov, INASAN, Moscow, Russia S. Röser, LSW-ARI, Heidelberg, Germany E. Schilbach, LSW-ARI, Heidelberg, Germany S.Yen, LSW, Heidelberg, Germany SFB 881 Workshop Heidelberg 15-17 Aug 2018 Clusters: MWSC Globular (logt>9.8) Young (logt≤7.3) in the Other (logt>7.3) Milky Way MWSC includes 3210 clusters of different types among them: associations 51 globular clusters 147 moving groups 19 embedded/with nebula 132 remnant clusters 401 members 0.8 mln All having ages, masses, distances and other parameters d <10 kpc dmod 2.4 kpc εd/d ~11% R.Hurt, Spitzer Science Center SFB 881 Workshop Heidelberg 15-17 Aug 2018 2 R.Hurt, Spitzer Science Center Gaia DR1 (TGAS) stars with trigonometric parallaxes 휛 2 mln. ε휛 0.3-0.7 mas G_lim 12 mag available since Sept 2016 Kovaleva, Dana A.; Piskunov, Anatoly E.; Kharchenko, Nina V.; Röser, Siegfried; Schilbach, Elena; Scholz, Ralf- Dieter; Reffert, Sabine; Yen, Steffi X. “Open star clusters in the Milky Way. Comparison of photometric and trigonometric distance scales based on Gaia TGAS data” 2017A&A...606L...8K 66 clusters with 16+ MWSC 60%-members in TGAS SFB 881 Workshop Heidelberg 15-17 Aug 2018 3 Gaia DR2 stars with trigonometric parallaxes 휛 1.3 bln. ε휛 0.007-0.6 mas G_lim >20 mag (not in all area) available since Apr 2018 + proper motions + two-color photometry G_BP, G_RP + radial velocities for 7.2 mln.
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