A VLBI polarization study of SiO masers towards VY CMa

L. L. Richter, A. J. Kemball, J. L. Jonas

Research output: Contribution to journalArticlepeer-review


Maser emission from the SiO molecule has been widely observed in the near-circumstellar envelopes of late-type, evolved stars. VLBI images can resolve individual SiO maser spots, providing information about the kinematics and magnetic field in the extended atmospheres of these stars. This poster presents full polarization images of several SiO maser lines towards the supergiant star VY CMa. VY CMa is a particularly strong SiO maser source and allows observations of a wide range of maser transitions. We discuss implications of these observations for VY CMa morphology, polarization, and pumping models.

Original languageEnglish (US)
Pages (from-to)328-329
Number of pages2
JournalProceedings of the International Astronomical Union
Issue numberS242
StatePublished - Mar 2007


  • Polarization
  • Stars: late-type

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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