«Another previous paper led by Eli Visbal, co-author of the current study and researcher at Columbia University, calculated that the neighbor galaxy would have to be at least 100 million times more massive than the Sun to emit enough radiation to prevent star formation in the host galaxy.
Giant galaxies of that size are relatively rare.»
Are they really so rare ? The mass of our own galaxy, the Milky Way has a mass estimated to be some 0.8–1.5×10¹² solar masses, while that of our closest neighbouring galaxy is estimated to be some 1.5×10¹² solar masses. Even the Large Magellanic Cloud, a so-called dwarf galaxy orbiting our own, is estimated to have a mass some 10¹⁰ solar masses. Is the quote above off by several orders of magnitude ?...