Volume 453, Number 1, July I 2006
|Page(s)||301 - 307|
|Section||Stellar structure and evolution|
|Published online||09 June 2006|
Radio continuum monitoring of the extreme carbon star IRC+10216
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany e-mail: kmenten,firstname.lastname@example.org
2 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA e-mail: email@example.com
3 National Radio Astronomy Obsrvatory, Array Operations Center, PO Box O, Socorro, NM 87801, USA e-mail: firstname.lastname@example.org
4 Jet Propulsion Laboratory, MS 183-900, 4800 Oak Grove Drive, Pasadena, CA 91109, USA e-mail: email@example.com
Accepted: 15 March 2006
We describe Very Large Array observations of the extreme carbon star IRC+10216 at 8.4, 14.9, and 22.5 GHz made over a two year period. We find possible variability correlated with the infrared phase and a cm- to sub-millimeter wavelength spectral index very close to 2. The variability, observed flux densities, and upper limit on the size are consistent with the emission arising from the stellar photosphere or a slightly larger radio photosphere.
Key words: stars: carbon / stars: AGB and post-AGB / radio continuum: stars / techniques: interferometic
© ESO, 2006
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