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Kinematics of Planetary Nebulae in M51's Tidal Tail

  • John J. Feldmeier (a1), J. Christopher Mihos (a1), Patrick R. Durrell (a2), Robin Ciardullo (a2) and George H. Jacoby (a3)...

Abstract

The galaxy pair NGC 5194/95 (M51) is one of the closest and best known interacting systems. Despite its notoriety, however, many of its features are not well studied. Extending westward from NGC 5195 is a low surface brightness tidal tail, which can only be seen in deep broadband exposures. Our previous [O III] λ5007 planetary nebulae (PN) survey of M51 recovered this tidal tail, and presented us with a opportunity to study the kinematics of a galaxy interaction in progress. We report the results of a spectroscopy survey of the PN, aimed at determining their kinematic properties. We then use these data to constrain new self-consistent numerical models of the system.

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References

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Burkhead, M.S. 1978, ApJS, 38, 147
Feldmeier, J., Ciardullo, R. & Jacoby, G. 1997, ApJ, 479, 231
Hernquist, L. 1987, ApJS, 64, 715
Hernquist, L. 1990, in Dynamics and interactions of galaxies, ed. Wielen, R. (New York: Springer-Verlag), 108.
Hernquist, L. 1993, ApJS, 86, 389
Salo, H. & Laurikainen, E. 2000, MNRAS, 319, 39
Toomre, A. & Toomre, J. 1972, ApJ, 178, 623

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Kinematics of Planetary Nebulae in M51's Tidal Tail

  • John J. Feldmeier (a1), J. Christopher Mihos (a1), Patrick R. Durrell (a2), Robin Ciardullo (a2) and George H. Jacoby (a3)...

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