13.12.2016
Mariusz Gromadzki
(Universidad de Valparaiso, Chile)
VVV/VVVx survey
STRESZCZENIE
The VISTA variables in the Vía Láctea (VVV) is one out of six ESO public survey undertaken on the 4.1-meter VISTA telescope in Cerro Paranal. It has provided multi-color (YZJHKs-bands) and multi-epoch (in Ks-band only) data for a 562 sqr. degree field in the Milky Way Bulge and the southern galactic plane, during the period 2010-2015. In 2016 the VVV eXtended survey (VVVX) was approved by ESO. It will cover the gaps left between the VVV and the VISTA Hemisphere Survey (VHS) areas and extend the VVV time-baseline enabling proper motion measurements of 300 μas/yr in the optically obscured regions, where Gaia is limited by extinction. VVVX will take 2000 hr, cover 1700 sqr. degree within the next 3yrs, and provide a deep JHKs catalogue of 2 × 10^9 point sources, as well as a Ks-band catalogue of ∼ 10^7 variable sources. Within the existing VVV area we will produce a 5-D map of the surveyed region by combining positions, distances and proper motions of well-understood distance indicators such as red clump stars, RR Lyrae and Cepheid variables. The VVV+VVVX catalogues will complement those from the Gaia space mission and will feed spectroscopic targets for the forthcoming ESO high-multiplex spectrographs MOONS and 4MOST. In my talk I would like to present details of these surveys and the most important results of VVV.
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O PRELEGENCIE
Mariusz Gromadzki got his PhD from the Nicolaus Copernicus Astronomical Center, Warsaw, with a project based on studies of symbiotic stars. Currently, he is a postdoctoral researcher at the University of Valpariso, Chile. His work concentrates on searching for high proper motion targets towards the Galactic bulge and the Galactic disk, using the VISTA-VVV survey. He is also involved in the near-IR spectroscopic and photometric follow-up of new very-late type brown dwarf candidates, detected only in the WISE W2 band.