76 mas speckle-masking interferometry of IRC+10216 with the SAO 6m telescope: Evidence for a clumpy shell structure

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dc.creatorWeigelt, G.
dc.creatorBalega, Y.
dc.creatorBloecker, T.
dc.creatorFleischer, A. J.
dc.creatorOsterbart, R.
dc.creatorWinters, J. M.
dc.date1998-05-04
dc.date.accessioned2026-07-07T02:26:45Z
dc.date.available2026-07-07T02:26:45Z
dc.descriptionWe present the first K'-band image of the carbon star IRC+10216 with 76 mas resolution. The diffraction-limited image was reconstructed from 6m telescope speckle data using the speckle masking bispectrum method. The image shows that the dust shell of IRC+10216 is extremely clumpy. Five individual clouds within a 210 mas radius of the central star have been resolved for the first time. On the basis of consistent theoretical models we argue that these structures are produced by circumstellar dust formation. The fragmentation of the shell structure gives most likely direct evidence for an inhomogeneous mass-loss process which may be interpreted in terms of large-scale surface convection-cells (Schwarzschild 1975) being a common phenomenon for red giants.
dc.description4 pages including 4 PostScript figures, A&A (Letter), also available from http://www.speckle.mpifr-bonn.mpg.de/publications.html
dc.identifierhttps://arxiv.org/abs/astro-ph/9805022
dc.identifierhttp://arxiv.org/abs/astro-ph/9805022
dc.identifierAstronomy & Astrophysics 333, L51-L54 (1998)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12403
dc.subjectAstrophysics
dc.title76 mas speckle-masking interferometry of IRC+10216 with the SAO 6m telescope: Evidence for a clumpy shell structure
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