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Astron. Astrophys. 364, 293-300 (2000)

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Scanning Fabry-Pérot observations of the HH 7-11 outflow system *

T.A. Movsessian 1, T.Yu. Magakian 1, P. Amram 2, J. Boulesteix 2 and J.-L. Gach 2

1 Byurakan Astrophysical Observatory, 378433 Aragatsotn reg., Armenia and Isaac Newton Institute Armenian Branch (tigmov@bao.sci.am; tigmag@sci.am)
2 Observatoire de Marseille, 2 place Le Verrier, 13248 Marseille Cedex 4, France

Received 7 June 2000 / Accepted 4 October 2000

Abstract

Results of Fabry-Pérot scanning interferometry of the HH 7-11 complex of Herbig-Haro objects are presented. Line profiles and velocity fields are derived. In HH 7 and HH 11 morphological changes in various velocities are discovered, which are interpreted as spatially separated bow shocks and Mach disks. Several arcuate-shaped features, oriented in the direction of the outflow, are pointed out. To explain the nature of the difference in the physical parameters of HH 11 and other knots a suggestion is made about the probable intersection of the two outflows.

Key words: ISM: individual objects: HH 7-11 – ISM: jets and outflows – ISM: kinematics and dynamics

* Based on observations taken at the 2.6 meter telescope of Byurakan Astrophysical Observatory, Armenia

Send offprint requests to: T.A. Movsessian

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© European Southern Observatory (ESO) 2000

Online publication: December 15, 2000
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