The structure of the dust shells around IRC +10216

Details The structure of the dust shells around IRC +10216 The structure of the dust shells around IRC +10216

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...444..452s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 444, no. 1, p. 452-457

Astronomy and Astrophysics

Astronomy

15

Carbon Stars, Cosmic Dust, Infrared Astronomy, Shells (Structural Forms), Stellar Envelopes, Emission, Geometry, Maximum Entropy Method, Radiative Transfer

Scientific paper

We have investigated IRC +10216 using a long-slit mid-infrared spectrometer and modeling the circumstellar dust with a radiative transfer algorithm. Maximum entropy reconstructions of the spectral images made with the slit oriented north/south and east/west reveal three components. Two shells of cool carbon-rich dust are seen, as well as a region of blue emission between the shells, approximately 1 sec north of the central source. The dust shell structure agrees well with previous interferometric observations: a circularly symmetric inner shell enclosed within an outer shell elongated roughly north/south. The blue emission appears to arise from a region of small grains of radiatively heated amorphous carbon and implies that the polar regions of the inner shell are optically thinner that the equatorial regions.

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