EVIDENCE FOR STABLE v=0, J=1 → 0 SiO MASER EMISSION FROM VY CANIS MAJORIS

被引：1

作者：

McIntosh, G. C. ^{[1
]}

Rislow, B. ^{[1
]}

机构：

[1] Univ Minnesota, Div Sci & Math, Morris, MN 56267 USA

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 692卷 / 01期

关键词：

circumstellar matter; masers; stars: individual (VY Canis Majoris); LATE-TYPE STARS; MAGNETIC-FIELD; POLARIZATION; TELESCOPE; RADIATION;

D O I：

10.1088/0004-637X/692/1/154

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：154 / 157

页数：4

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