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Astron. Astrophys. 346, 237-242 (1999)

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Kinematics of the strange knots and halo of the planetary nebula IC 4593

J.A. O'Connor 1, J. Meaburn 1, J.A. López 2 and M.P. Redman 1

1 Department of Physics and Astronomy, University of Manchester, Schuster Laboratory, Oxford Road, Manchester, M13 9PL, UK
2 Instituto de Astronomía, UNAM, Apartado Postal 877, Ensenada, Baja California, 22830, Mexico

Received 4 January 1999 / Accepted 5 March 1999


Kinematical observations have been made with the Manchester Echelle Spectrometer combined with the San Pedro Mártir telescope of the various features of the strange planetary nebula IC 4593. In particular the outer knots are shown to be inert and extended high-speed flows are found to be emerging from the nebular core. Various models for the whole structure are discussed in the face of these new observations.

Key words: ISM: jets and outflows – ISM: kinematics and dynamics – ISM: planetary nebulae: general – ISM: planetary nebulae: individual: IC 4593

Send offprint requests to: joc@ast.man.ac.uk

© European Southern Observatory (ESO) 1999

Online publication: May 6, 1999