tokens: Acknowledgements This paper makes use of the following ALMA data: ADS/JAO.ALMA#2015.1.00296.S. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, auI/NRAO, and NAOJ. This work was supported by the National Programs PCMI and PNPS from INSU-CNRS. DS acknowledges support from the Heidelberg Institute of Theoretical Studies for the project “Chemical kinetics models and visualization tools: Bridging biology and astronomy”. DF and CF acknowledge support from the Italian Ministry of Education, Universities and Research, project SIR (RBSI14ZRHR). This research made use of NASA’s Astrophysics Data System. The figures in this paper were constructed with the MATPLOTLIB package ( Hunter 2007 ) and APLPY package hosted at http://aplpy.github.io .
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