Kinetic temperature of massive star forming molecular clumps measured with formaldehyde X. D. Tang, C. Henkel, K. M. Menten, X. W. Zheng, J. Esimbek, J. J. Zhou, C. C. Yeh, C. König, Y. Yuan, Y. X. He and D. L. Li A&A, 598 (2017) A30 Published online: 26 January 2017 DOI: 10.1051/0004-6361/201629694