CaltechAUTHORS
Published November 1, 2012 | Version Published
Journal Article Open

CO Structure of the 21 μm Source IRAS 22272+5435: A Sign of a Jet Launch?

Creators

  • 1. ROR icon University of Hong Kong
  • 2. ROR icon University of Calgary
  • 3. ROR icon California Institute of Technology

Abstract

We report the results of radio interferometric observations of the 21 μm source IRAS 22272+5435 in the CO J = 2-1 line. 21 μm sources are carbon-rich objects in the post-asymptotic-giant-branch phase of evolution, which show an unidentified emission feature at 21 μm. Since 21 μm sources usually also have circumstellar molecular envelopes, the mapping of CO emission from the envelope will be useful in tracing the nebular structure. From observations made with the Combined Array for Research in Millimeter-wave Astronomy, we find that a torus and spherical wind model can explain only part of the CO structure. An additional axisymmetric region created by the interaction between an invisible jet and ambient material is suggested.

Additional Information

© 2012 American Astronomical Society. Received 2012 July 19; accepted 2012 September 18; published 2012 October 17. This work is supported by a grant awarded to J.N. and S.N. from the Research Grants Council of Hong Kong (project code: HKU 704710P; HKU 703110P) and the Small Project Funding of the University of Hong Kong (project code: 201007176004). Support for CARMA construction was derived from the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the James S. McDonnell Foundation, the Associates of the California Institute of Technology, the University of Chicago, the states of California, Illinois, and Maryland, and the National Science Foundation. Ongoing CARMA development and operations are supported by the National Science Foundation under a cooperative agreement, and by the CARMA partner universities. The authors thank Hiroshi Imai for stimulating discussions and valuable comments.

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Additional details

Identifiers

Eprint ID
36018
Resolver ID
CaltechAUTHORS:20121218-073813213

Funding

Research Grants Council of Hong Kong
HKU 704710P
Research Grants Council of Hong Kong
HKU 703110P
University of Hong Kong Small Project Funding
201007176004
Gordon and Betty Moore Foundation
Kenneth T. and Eileen L. Norris Foundation
James S. McDonnell Foundation
Caltech Associates
University of Chicago
NSF
CARMA partner universities
States of California, Illinois, and Maryland

Dates

Created
2012-12-18
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field