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Astron. Astrophys. 364, 409-418 (2000)


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The minor axis outflow of NGC 2146

A. Greve 1, N. Neininger 2, A. Tarchi 2 and A. Sievers 3

1 Institut de Radio Astronomie Millimétrique, 300 rue de la Piscine, 38406 St. Martin d`Hères, France
2 Astronomisches Institut der Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
3 Instituto Radioastronomía Milimétrica, Nucleo Central, 7 Avenida Divina Pastora, 18012 Granada, Spain

Received 16 February 2000 / Accepted 3 October 2000

Abstract

X-ray and optical observations have shown that the supernova explosions and stellar winds of the starburst in NGC 2146 produce an outflow of hot material along the minor axis. This outflow is expected to have a more or less conical shape, on either side of the galactic plane, and cone walls of cooler material where the outflow is in shock contact with halo gas. We attempt to determine the geometry (diameter at the base and opening angle) and the physical parameters (velocity and density) of the material in the cone walls from the optical emission line and radio observations presented here, and from published X-ray, radio, and optical observations. We compare the outflow of NGC 2146 with the outflow of M 82.

Key words: galaxies: individual: NGC 2146 – galaxies: ISM – galaxies: kinematics and dynamics – galaxies: structure

Send offprint requests to: A. Greve

© European Southern Observatory (ESO) 2000

Online publication: January 29, 2001

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