Discovery of a reflection dust envelope around IRC + 10216

Details Discovery of a reflection dust envelope around IRC + 10216 Discovery of a reflection dust envelope around IRC + 10216

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326l..17t&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 326, March 1, 1988, p. L17-L21. SERC-MOESC-supporte

Astronomy and Astrophysics

Astronomy

29

Infrared Sources (Astronomy), Late Stars, Stellar Envelopes, Light Scattering, Near Infrared Radiation, Polarimetry

Scientific paper

IR polarimetric and photometric mapping observations at K and H have revealed an extended dust envelope around the late-type star IRC + 10216. The IR envelope is nearly circularly symmetric with radial extent greater than about 0.09 pc, comparable to the size of the molecular gas envelope. The polarization vectors of the NIR continuum radiation from the envelope show a clear centrosymmetric pattern, indicating that the IR nebulosity is due to scattering by dust grains in the envelope. The radial distribution of dust grains inferred from the polarized intensity most likely obeys an inverse-square law, which suggests a steady mass loss between r = 15 arcsec and r = 60 arcsec.

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