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Title: CO STRUCTURE OF THE 21 {mu}m SOURCE IRAS 22272+5435: A SIGN OF A JET LAUNCH?

Abstract

We report the results of radio interferometric observations of the 21 {mu}m source IRAS 22272+5435 in the CO J = 2-1 line. 21 {mu}m sources are carbon-rich objects in the post-asymptotic-giant-branch phase of evolution, which show an unidentified emission feature at 21 {mu}m. Since 21 {mu}m 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.

Authors:
; ; ;  [1];  [2];  [3]
  1. Department of Physics, University of Hong Kong, Pokfulam Road (Hong Kong)
  2. Department of Physics and Astronomy, University of Calgary, Calgary, T2N 1N4 (Canada)
  3. California Institute of Technology, Owens Valley Radio Observatory, Big Pine, CA 93513 (United States)
Publication Date:
OSTI Identifier:
22086440
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; ASYMPTOTIC SOLUTIONS; AXIAL SYMMETRY; CARBON; CARBON MONOXIDE; ION EMISSION; JETS; MAPPING; SPHERICAL CONFIGURATION; STARS; STELLAR WINDS

Citation Formats

Nakashima, Jun-ichi, Kwok, Sun, Yung, Bosco H. K., Zhang Yong, Koning, Nico, and Volgenau, Nikolaus H., E-mail: junichi@hku.hk. CO STRUCTURE OF THE 21 {mu}m SOURCE IRAS 22272+5435: A SIGN OF A JET LAUNCH?. United States: N. p., 2012. Web. doi:10.1088/0004-637X/759/1/61.
Nakashima, Jun-ichi, Kwok, Sun, Yung, Bosco H. K., Zhang Yong, Koning, Nico, & Volgenau, Nikolaus H., E-mail: junichi@hku.hk. CO STRUCTURE OF THE 21 {mu}m SOURCE IRAS 22272+5435: A SIGN OF A JET LAUNCH?. United States. doi:10.1088/0004-637X/759/1/61.
Nakashima, Jun-ichi, Kwok, Sun, Yung, Bosco H. K., Zhang Yong, Koning, Nico, and Volgenau, Nikolaus H., E-mail: junichi@hku.hk. Thu . "CO STRUCTURE OF THE 21 {mu}m SOURCE IRAS 22272+5435: A SIGN OF A JET LAUNCH?". United States. doi:10.1088/0004-637X/759/1/61.
@article{osti_22086440,
title = {CO STRUCTURE OF THE 21 {mu}m SOURCE IRAS 22272+5435: A SIGN OF A JET LAUNCH?},
author = {Nakashima, Jun-ichi and Kwok, Sun and Yung, Bosco H. K. and Zhang Yong and Koning, Nico and Volgenau, Nikolaus H., E-mail: junichi@hku.hk},
abstractNote = {We report the results of radio interferometric observations of the 21 {mu}m source IRAS 22272+5435 in the CO J = 2-1 line. 21 {mu}m sources are carbon-rich objects in the post-asymptotic-giant-branch phase of evolution, which show an unidentified emission feature at 21 {mu}m. Since 21 {mu}m 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.},
doi = {10.1088/0004-637X/759/1/61},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}