Kinematics of Planetary Nebulae in M51's Tidal Tail Feldmeier, J. J. ; Mihos, J. C. ; Durrell, P. R. ; Ciardullo, R. ; Jacoby, G. H. Abstract Publication: Planetary Nebulae: Their Evolution and Role in the Universe Pub Date: 2003 Bibcode: 2003IAUS..209..633F