328 citations · 1.2k across the 20 of their papers we have counts for
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M. Mapelli, M. Colpi, L. Zampieri
Low-metallicity (Z <~ 0.05 Zsun) massive (>~40 Msun) stars might end their life by directly collapsing into massive black holes (BHs, 30 <~ m_BH/Msun <~ 80). More than ~10^5 massiv…