Massive and low-mass protostars in massive “starless” cores Thushara Pillai, Jens Kauffmann, Qizhou Zhang, Patricio Sanhueza, Silvia Leurini, Ke Wang, T. K. Sridharan and Carsten König A&A, 622 (2019) A54 Published online: 28 January 2019 DOI: 10.1051/0004-6361/201732570