Abstract
The extended atmospheres/inner circumstellar envelopes of Asymptotic Giant Branch stars are very complex regions where intense phenomena occur and periodic passages of shock waves are believed to contribute to their complexity. Located between the extended atmosphere and the dust formation zone, SiO masers provide a valuable tool in the study of these complex regions. Reg-
istration of the relative positions of the v=1 and v=2, J=1→0 emissions can help us compare the characteristics of these transitions; such comparisons can greatly contribute in our understanding of the physical conditions and kinematics in the extended atmosphere of the star. We will present
results from a long-term monitoring campaign of both emissions. Our data cover 0.6 cycles of the stellar pulsation. Observations were conducted with the VLBA once every month.
istration of the relative positions of the v=1 and v=2, J=1→0 emissions can help us compare the characteristics of these transitions; such comparisons can greatly contribute in our understanding of the physical conditions and kinematics in the extended atmosphere of the star. We will present
results from a long-term monitoring campaign of both emissions. Our data cover 0.6 cycles of the stellar pulsation. Observations were conducted with the VLBA once every month.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of Science |
| State | Published - 2013 |
| Event | 11th European VLBI Network Symposium & Users Meeting - Bordeaux, France Duration: Oct 9 2012 → Oct 12 2012 |
Conference
| Conference | 11th European VLBI Network Symposium & Users Meeting |
|---|---|
| Country/Territory | France |
| City | Bordeaux |
| Period | 10/9/12 → 10/12/12 |