Hostname: page-component-6bf8c574d5-rwnhh Total loading time: 0 Render date: 2025-02-17T14:55:27.606Z Has data issue: false hasContentIssue false
  • English
  • Français

Interferometric Observations of OH and H2O Masers in Protoplanetary Nebulae Imaged with HST - A Unique Diagnostic of their Spatio-Kinematic Structure

Published online by Cambridge University Press:  26 May 2016

Raghvendra Sahai ,
Mark J. Claussen  and
Mark Morris
Raghvendra Sahai
Affiliation:
JPL, California Institute of Technology, Pasadena, CA 91109
Mark J. Claussen
Affiliation:
NRAO, Socorro, NM 87801
Mark Morris
Affiliation:
University of California, Los Angeles, CA 90095

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Recently, high-resolution imaging surveys of young planetary nebulae (PNe) and protoplanetary nebulae (PPNe) have revealed that the majority of these objects are characterised by multipolar bubbles distributed roughly point-symmetrically around the central star (e.g. Sahai & Trauger 1998, Sahai 2000). Sahai & Trauger (1998) have proposed that episodic high-speed jet-like outflows, operating during the protoplanetary or very late-AGB phase, are the primary agent for shaping PNe. OH and H2O masers provide a unique and crucial probe of the kinematics of the circumstellar material in PPNe, because of the general lack of other emission-line diagnostics. Here we present new results from our ongoing study of PPNe using HST images with interferometric OH & H2O maser-line data to unravel their detailed spatio-kinematic structure (e.g. Sahai et al. 1999a, Sahai, Claussen, & Morris 2002).

Type
Part VII: Nebular Morphology and Dynamics
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 519 - 520
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Likkel, L., & Morris, M. 1988, ApJ, 329, 914 CrossRefGoogle Scholar
Sahai, R. & Trauger, J.T. 1998, AJ, 116, 1357 CrossRefGoogle Scholar
Sahai, R., Zijlstra, A., Bujarrabal, V., te Lintel Hekkert, P. 1999a, AJ, 117, 1408 CrossRefGoogle Scholar
Sahai, R., te Lintel Hekkert, P., Morris, M., Zijlstra, A., Likkel, L. 1999b, ApJ, 514, L115 Google Scholar
Sahai, R., Claussen, M.J. & Morris, M. 2002, in Cosmic Masers: from Protostars to Black Holes , IAU 206, Eds. Migenes, V. et al. (in press) CrossRefGoogle Scholar