On the structure of the nebula M 2-9

Details On the structure of the nebula M 2-9 On the structure of the nebula M 2-9

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....85..161k&link_type=abstract

Astronomy and Astrophysics, vol. 85, no. 1-2, May 1980, p. 161-167.

Astronomy and Astrophysics

Astrophysics

36

Astronomical Photography, Planetary Nebulae, Stellar Structure, Astrometry, Morphology

Scientific paper

The structure of planetary nebula M 2-9 has been investigated on direct plates taken with the ESO 3.6 m-telescope in 1977-78. Compared with the photographs from 1952, 1971, and 1973 the main condensations in the wings show a remarkable shift approximately in the W-E direction which can be explained as a rotating motion about the nebular axis of symmetry (N-S axis). The angular velocity seems to increase with the distance from the core. Two faint loops extending to about 1 arcmin on each side of the core and lying on the nebular axis were discovered. The very elongated shape of the nebula indicates the presence of an anisotropic velocity field in it.

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