tokens: ACKNOWLEDGEMENTS Our results are based on observations with the 2.2-m telescope of the University of Hawaii and we thank Colin Aspin and Mark Willman for their interest and support. Special thanks go to László Szabados for a careful reading of the manuscript and for the suggestions to improve it. We would like to thank Péter Ábrahám for the 13 CO data. This work makes use of observations made with the Spitzer Space Telescope , which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France. The original description of the VizieR service was published in Ochsenbein, Bauer Marcout ( 2000 ). This work has made use of 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. We thank the anonymous referee for helpful suggestions.
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