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The 135 classical novae that we have discovered in M87 with two$\textit{Hubble Space Telescope}$ imaging surveys appear to be stronglyconcentrated along that galaxy's jet. Detailed simulations show that thelikelihood that this distribution occurred by chance is of order $0.3\%$. Thenovae near the jet display outburst characteristics (peak luminosities, colorsand decline rates) that are indistinguishable from novae far from the jet. Weexplore whether the remarkable nova distribution could be caused by the jet'sirradiation of the hydrogen-rich donors in M87's cataclysmic binaries. Thisexplanation, and others extant in the literature which rely on increased binarymass transfer rates, fail by orders of magnitude in explaining the enhancednova rate near the jet. An alternate explanation is the presence of a genuinesurplus of nova binary systems near the jet, perhaps due to jet-induced starformation. This explanation fails to explain the lack of nova enhancement alongM87's counterjet. The enhanced rate of novae along M87's jet is now firmlyestablished, and unexplained.

A 9-Month Hubble Space Telescope Near-UV Survey of M87. II. A Strongly Enhanced Nova Rate near the Jet of M87