The carbon star IRC+10216: linking the complex inner region with its spherical large-scale structures

Details The carbon star IRC+10216: linking the complex inner region with its spherical large-scale structures The carbon star IRC+10216: linking the complex inner region with its spherical large-scale structures

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.376l...6m&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 376, Issue 1, pp. L6-L10.

Physics

Optics

5

Instrumentation: Adaptive Optics, Stars: Agb And Post-Agb, Circumstellar Matter, Infrared: Stars

Scientific paper

IRC+10216 is located at the tip of the asymptotic giant branch of the Hertzsprung-Russell diagram in a transition phase toward the post-asymptotic giant branch stage. Its study contributes to our knowledge of the late stage of stellar evolution of low- and intermediate-mass stars, when the circumstellar matter begins to adopt the asymmetric or bipolar forms commonly found in planetary nebulae. Using the NAOS-CONICA (NACO) adaptive optics system, we have mapped the circumstellar environment of IRC+1O216 at several wavelengths and three different epochs. The NACO study provides high-resolution and high-dynamic-range information on the different features displayed by the circumstellar envelope: clumpiness and a peanut- or bipolar-like shape at small scales. The link between the inner regions and the spherical-like shells observed at large scales is displayed in these high-dynamic-range data.

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