1. Department of Astrophysics, Vietnam National Space Center (VNSC), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Ha Noi, Vietnam
2. LERMA, UMR 8112, CNRS and Observatoire de Paris, PSL Research University, 61 av. de l’Observatoire, F-75014 Paris, France
3. IRAM, 300 rue de la Piscine, Domaine Universitaire, F-38406 St. Martin d’Héres, France