Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..378..262w&link_type=abstract
Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes. ASP Conference Series, Vol. 378, proceedings of the co
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We report on our project to study the atmospheric structure and circumstellar environment of evolved stars using optical and radio long-baseline interferometry. VLTI observations of the cool giants ψ Phe, γSge, and α Cet have previously been used to calibrate stellar model atmospheres of regular non-pulsating cool giants as well as to derive high-precision fundamental parameters. Previous VLTI observations of the Mira variable R Leo are consistent with self-excited dynamic Mira model atmospheres that include molecular shells close to the continuum-forming layers. Coordinated observations of evolved stars at near-infrared, mid-infrared, and radio wavelengths have been conducted, aiming at a better understanding of the stellar pulsation, the mass-loss process, and the triggering and formation of asymmetric structures. Results from our pilot study on the Mira variable S Ori show that the SiO masers reside at a distance of about 2 photospheric radii, a result that is virtually free of the usual uncertainty inherent in comparing observations of variable stars often widely separated in time. Preliminary results of new coordinated VLTI/MIDI and VLBA observations of S Ori at concurrent epochs are shown.
Boboltz David A.
Driebe Th.
Ohnaka Keiichi
Wittkowski Markus
No associations
LandOfFree
Polychromatic Interferometry of Mira Variables does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Polychromatic Interferometry of Mira Variables, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polychromatic Interferometry of Mira Variables will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-735931