tokens: ACKNOWLEDGEMENTS ADR, LAA, GO, GRL, and SOK acknowledge financial support from CNPq and PRONEX-FAPERGS/CNPq (Brazil). TK acknowledges financial support from Capes (Brazil). DS is supported by the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., on behalf of the international Gemini partnership of Argentina, Brazil, Canada, Chile, the Republic of Korea, and the United States of America. IP acknowledges funding by the Deutsche Forschungsgemeinschaft under grant GE2506/12-1. Based on observations obtained at Observatório do Pico dos Dias/LNA, at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministério da Ciência, Tecnologia, Inovação e Comunicaçẽs (MCTIC) do Brasil, the US National Optical Astronomy Observatory (NOAO), the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU) and processed using the Gemini iraf package, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina) and Ministério da Ciência, Tecnologia, Inovação e Comunicaçẽs (Brasil). This work has used data from the European Space Agency (ESA) mission Gaia ( https://www.cosmos.esa.int/gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has also made use of the TOPCAT ( http://www.starlink.ac.uk/topcat/ ) software (Taylor 2005 ), The Montreal White Dwarf Database (Dufour et al. 2017 , http://www.montrealwhitedwarfdatabase.org/home.html ), and NASA Astrophysics Data System. We thank P. Bergeron for sharing the atmosphere models for DA white dwarf for Gaia filters. The observational data are available upon request to alejandra.romero@ufrgs.br .
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