Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...359l..59d&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 359, Aug. 20, 1990, p. L59-L63. Research supported by the Univers
Astronomy and Astrophysics
Astrophysics
50
Carbon Stars, Cosmic Dust, Stellar Envelopes, Variable Stars, Very Long Base Interferometry, Infrared Radiation, Radiative Transfer, Stellar Luminosity, Stellar Mass Ejection, Stellar Systems, Stellar Temperature
Scientific paper
A new long-baseline interferometer for the 10-micron region has provided visibility measurements of IRC + 10216 at spatial frequencies in the range 1.4-12 x 10 to the 5th/rad. These show large changes in visibility with phase of the LPV's luminosity. Model fitting of the visibility curves indicates that dust forms closer to the star and at higher temperatures than has been indicated by previous measurements. In addition, new dust appears to form near minimum luminosity. There is general agreement with previous theoretical expectation that dust should form at temperatures above about 1300 K and that close to the star the material is less transparent at mid-IR wavelengths than in the near-IR.
Bester Manfred
Danchi William C.
Degiacomi Cuno G.
McCullough Peter R.
Townes Charles H.
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