The 8 micron band of silicon monoxide in the expanding cloud around VY Canis Majoris

T.R. Geballe, J.H. Lacy, S.C. Beck

Research output: Contribution to journalArticlepeer-review

Abstract

Observations of vibration-rotation transitions of silicon monoxide in VY CMa shows that the lines originate in accelerating, expanding, and cool (~600K) layers of a circumstellar cloud at a distance of ~0.15 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 masar emission features. Most of the silicon is probably in the form of dust grains. The isotopic ratios of silicon are nearly terrestrial.
Original languageEnglish
Pages (from-to)47 - 51
JournalAstrophys. J., Lett. Ed. (USA)
Volume230
Issue number1
StatePublished - May 1979

Keywords

  • infrared astronomical observations
  • interstellar matter
  • silicon compounds
  • stellar spectra
  • variable stars

Fingerprint

Dive into the research topics of 'The 8 micron band of silicon monoxide in the expanding cloud around VY Canis Majoris'. Together they form a unique fingerprint.

Cite this