The eight micron band of silicon monoxide in the expanding cloud around VY Canis Majoris
Technical Report
·
OSTI ID:5829381
Observations of vibration-rotation transitions of silicon monoxide in VY CMa show that the lines originate in accelerating, expanding, and cool (600 K) layers of a circumstellar cloud at a distance of roughly 0.15 minutes from the central star. The central stellar velocity, as estimated from observed SiO P Cygni line profiles, is somewhat redshifted from the midpoint of the maser emission features. Most of the silicon is proabably in the form of dust grains. The isotopic ratios of silicon are nearly terrestrial.
- Research Organization:
- Hale Observatories, Pasadena, CA (USA)
- OSTI ID:
- 5829381
- Report Number(s):
- N-79-13959
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
ATMOSPHERES
CHALCOGENIDES
CHEMISTRY
COSMOCHEMISTRY
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY LEVELS
EXCITED STATES
INFRARED SPECTRA
ISOTOPE RATIO
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OXIDES
OXYGEN COMPOUNDS
RED SHIFT
ROTATIONAL STATES
SEMIMETALS
SILICON
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
STARS
STELLAR ATMOSPHERES
VELOCITY
VIBRATIONAL STATES
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
ATMOSPHERES
CHALCOGENIDES
CHEMISTRY
COSMOCHEMISTRY
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY LEVELS
EXCITED STATES
INFRARED SPECTRA
ISOTOPE RATIO
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OXIDES
OXYGEN COMPOUNDS
RED SHIFT
ROTATIONAL STATES
SEMIMETALS
SILICON
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
STARS
STELLAR ATMOSPHERES
VELOCITY
VIBRATIONAL STATES