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

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 <sup>2

1</sup> 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

SIMBAD Objects

Contents

• 1. Introduction
• 2. Observations and data reduction
• 3. Results
  • 3.1. HH 7
  • 3.2. HH 8
  • 3.3. HH 9
  • 3.4. HH 10
  • 3.5. HH 11
  • 3.6. HH bridge and "bubbles"
• 4. Discussion
• 5. Conclusion
• Acknowledgements
• References

© European Southern Observatory (ESO) 2000

Online publication: December 15, 2000
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