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

Journal Article · Thu Nov 01 00:00:00 EDT 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/759/1/61· OSTI ID:22086440

Nakashima, Jun-ichi; Kwok, Sun; Yung, Bosco H. K.; Yong, Zhang ^[1]; Koning, Nico ^[2]

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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)

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.

• OSTI ID: 22086440
• Journal Information: Astrophysical Journal, Vol. 759, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTRONOMY
ASTROPHYSICS
ASYMPTOTIC SOLUTIONS
AXIAL SYMMETRY
CARBON
CARBON MONOXIDE
ION EMISSION
JETS
MAPPING
SPHERICAL CONFIGURATION
STARS
STELLAR WINDS