ACES Constraints on the Shapes of SiO Maser Objects in AGB Star CSEs

Explore a 19-minute astronomy lecture examining the shapes of Silicon Monoxide (SiO) maser objects in Asymptotic Giant Branch (AGB) star circumstellar envelopes (CSEs). Delve into 3D modeling research conducted at the National Astronomical Research Institute of Thailand that investigates how different cloud shapes and orientations create ring-like maser distributions within 5 stellar radii of AGB star photospheres. Learn about the effects of periodic shock-waves and dust radiation on these regions, with particular focus on lower rotational transitions from J=1-0 to J=3-2. Discover key findings that rule out spherical maser objects matching observed feature sizes in stars like TX Cam and R Cas, while examining alternative oblate and prolate configurations influenced by stellar magnetic fields and shock waves.