Asteroseismic analysis of solar-mass subgiants KIC 6442183 and KIC 11137075 observed by Kepler Zhijia Tian, Shaolan Bi, Timothy R. Bedding and Wuming Yang A&A, 580 (2015) A44 Published online: 28 July 2015 DOI: 10.1051/0004-6361/201525968