Simultaneous 3mm and 7mm Observations of SiO Masers around R Cassiopeiae: The Maser Line Ratios

Details Simultaneous 3mm and 7mm Observations of SiO Masers around R Cassiopeiae: The Maser Line Ratios Simultaneous 3mm and 7mm Observations of SiO Masers around R Cassiopeiae: The Maser Line Ratios

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002evn..conf..231p&link_type=abstract

6th European VLBI Network Symposium on New Developments in VLBI Science and Technology, held in Bonn, June 25th-28th 2002, proce

Astronomy and Astrophysics

Astronomy

Scientific paper

We present dual-transition (J = 1 → 0 and J = 2 → 1) images for R Cassiopeiae. Line ratios and limits for the J = 1 → 0 and J = 2 → 1 emission vary from roughly unity to several hundred to one. Local velocity trends can be seen in the VLBI images. These new, specific comparisons of rotational transitions show promise for testing emission models, and should be used to incisively probe the physical processes at the base of AGB star mass-loss envelopes.

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