105 citations · 379 across the 9 of their papers we have counts for
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A. R. King, H. Ritter
We consider the unusual evolutionary state of the secondary star in Cygnus X-2. Spectroscopic data give a low mass ($M_2 \simeq 0.5 - 0.7\msun$) and yet a large radius ($R_2 \simeq…