Kinematics of planetary nebulae in M51's tidal debris

Patrick R. Durrell, J. Christopher Mihos, John J. Feldmeier, George H. Jacoby, Robin Ciardullo

Research output: Contribution to journalReview articlepeer-review

27 Scopus citations


We report the results of a radial velocity survey of planetary nebulae (PNe) located in the tidal features of the well-known interacting system NGC 5194/95 (M51). We find clear kinematic evidence that M51's north-western tidal debris consists of two discrete structures that overlap in projection - NGC 5195's own tidal tail and diffuse material stripped from NGC 5194. We compare these kinematic data to a new numerical simulation of the M51 system and show that the data are consistent with the classic "single-passage" model for the encounter, with a parabolic satellite trajectory and a 2 : 1 mass ratio. We also comment on the spectra of two unusual objects: a high-velocity PN that may be associated with NGC 5194's halo and a possible interloping high-redshift galaxy.

Original languageEnglish (US)
Pages (from-to)170-183
Number of pages14
JournalAstrophysical Journal
Issue number1 I
StatePublished - Jan 1 2003

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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