TIGvival: High-resolution spectroscopic monitoring of LPV stars. Issue Volume 14:Issue S343(2019) (August 2018)

• Record Type: Journal Article
• Authors: Wolter, Uwe; Engels, Dieter; Aringer, Bernhard; Freytag, Bernd
• Editors: Kerschbaum, Franz; Groenewegen, Martin; Olofsson, Hans
• Is Part Of: Proceedings of the International Astronomical Union. Volume 14:Issue S343(2019)
• Page Start: 548
• Page End: 549
• Publication Date: 2018-08
• Subjects: stars: AGB and post-AGB, -- molecular processes, -- techniques: spectroscopic; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921318007718
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: TIG vival is a spectroscopic monitoring program of long-period variables (LPV) using our robotic telescope TIGRE. Since 2013, we obtain low-noise, high-resolution spectra (R= 20 000) that cover the optical regime (3800 Å to 8800 Å). We are now continuously monitoring 7 LPVs with different periods and chemical properties. Our 350+ spectra evenly sample the target cycles, as far as ground-based observations allow. Analyzing the TIG vival spectra of Mira as a sample case, our measurements indicate that the strength of the TiO-absorption is phase-shifted with respect to the visual light curve.