A Rare Encounter with Very Massive Stars in NGC 3125-A1

Aida Wofford, Claus Leitherer, Rupali Chandar +1

Super star cluster A1 in the nearby starburst galaxy NGC 3125 is characterized by broad He\ii \lam1640 emission (full width at half maximum, $FWHM\sim 1200$ km s${}^{-1}$) of unpreced…