Evidence for Stable v = 0, j = 1 → 0 SiO Maser Emission from VY Canis Majoris

Details Evidence for Stable v = 0, j = 1 → 0 SiO Maser Emission from VY Canis Majoris Evidence for Stable v = 0, j = 1 → 0 SiO Maser Emission from VY Canis Majoris

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...692..154m&link_type=abstract

The Astrophysical Journal, Volume 692, Issue 1, pp. 154-157 (2009).

Astronomy and Astrophysics

Astronomy

Circumstellar Matter, Masers, Stars: Individual: Vy Canis Majoris

Scientific paper

Observations of the SiO v = 0, J = 1 → 0 spectra from VY CMa from 2003 through 2006 indicate an unusually long-lived, highly linearly polarized maser emission at a V lsr of approximately 18.5 km s-1. A time series cross-correlation analysis has been developed for calculating the characteristic lifetime of linearly polarized spectra. Applying the cross-correlation to these spectra indicates a characteristic lifetime of 5600 ± 400 days. These emission characteristics may be generated in a region of relatively stable outflow geometry and magnetic field rather than in the more ephemeral circumstellar environment.

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