Near-infrared spectroscopy of candidate red supergiant stars in clusters Maria Messineo, Zhu Qingfeng, Valentin D. Ivanov, Donald F. Figer, Ben Davies, Karl M. Menten, Rolf P. Kudritzki and C.-H. Rosie Chen A&A, 571 (2014) A43 Published online: 06 November 2014 DOI: 10.1051/0004-6361/201423802