NOAO >   Observing Info >   Approved Programs >   2018A-0059

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Program Information for 2018A-0059


PI: Herve Bouy, University of Bordeaux, herve.bouy@u-bordeaux.fr
Address: Laboratoire d'Astrophysique de Bordeaux, Allee Geoffroy Saint Hilaire, Pessac 33610 France

CoI: Emmanuel Bertin, IAP
CoI: Lori Allen, NOAO
CoI: Yuri Beletsky, LCO
CoI: Luis Manuel Sarro, UNED
CoI: Miret-Roig Nuria, University of Bordeaux
CoI: Olivares Javier, University of Bordeaux

Title: Complementing Gaia from the ground: the COSMIC-DANCE survey

Abstract: We propose to obtain new epoch wide field images of 22 young nearby clusters and associations with DECam. The time difference with our own DECam images obtained 4 years ago will allow us to compute accurate transverse velocities down to $<$4 mas/yr accuracy. Combined with archival NOAO, ESO, Subaru CFHT & UKIRT wide field images obtained between 15 and 18 years ago, the precision will go down to $<$0.5mas/yr over a significant fraction of the survey. These measurements will complement the Gaia mission i) down to the planetary mass regime; ii) in young deeply embedded regions where Gaia will be blind. These observations will allow us: a) to derive a complete census based on a kinematic+photometric selection of members; 2) perform a statistically significant study of the IMF; 3) study the internal dynamics of each group separately, and perform a comparison of groups of various ages, metallicities, densities, and structures {bf over a luminosity (mass) range that Gaia will not reach}. This is a resubmission of 2017A-0002 because of bad weather loss.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  CT-4m/DECam -- 3.5n on Apr 24 - Apr 27 2018


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