Dust around young stars. Observations of the polarization of UX Ori in deep minima
Photometric and polarimetric monitoring observations of UX Ori begun in 1986 in the Crimea and Bolivia have resulted in the observation of two deep minima of the brightness during which a growth of the linear polarization (to approx. =7%) was observed, together with a tendency for the circular polarization to increase (up to approx. =1%). Analysis of the observational data shows that the main source of the polarized radiation in the deep minima is the emission of the star scattered by grains of circumstellar dust. On the basis of Mie's theory for a polydisperse graphite-silicate mixtures of particles the optical properties of ellipsoidal dust envelopes have been calculated and a model of the Algol-like minimum constructed.
- Research Organization:
- Leningrad State Univ. (USSR)
- OSTI ID:
- 6063875
- Journal Information:
- Astrophysics (Engl. Transl.); (United States), Vol. 28:2; Other Information: Translated from Astrofizika; 28: No. 2, 311-327(Mar-Apr 1988)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
STARS
COSMIC DUST
STELLAR RADIATION
POLARIZATION
BRIGHTNESS
COLOR
COSMIC ELECTRONS
COSMIC PHOTONS
GRAPHITE
MATHEMATICAL MODELS
OPTICAL PROPERTIES
PHOTOMETRY
POLARIMETRY
REMOTE SENSING
SCATTERING
SILICATES
STAR EVOLUTION
STELLAR ATMOSPHERES
VARIATIONS
ATMOSPHERES
CARBON
COSMIC RADIATION
DUSTS
ELECTRONS
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
MINERALS
NONMETALS
ORGANOLEPTIC PROPERTIES
OXYGEN COMPOUNDS
PHOTONS
PHYSICAL PROPERTIES
RADIATIONS
SILICON COMPOUNDS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources