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TIGvival: High-resolution spectroscopic monitoring of LPV stars

Published online by Cambridge University Press:  30 December 2019

Uwe Wolter ,
Dieter Engels ,
Bernhard Aringer  and
Bernd Freytag
Uwe Wolter
Affiliation:
Hamburger Sternwarte, Universität Hamburg, Germany email: uwolter@hs.uni-hamburg.de
Dieter Engels
Affiliation:
Hamburger Sternwarte, Universität Hamburg, Germany email: uwolter@hs.uni-hamburg.de
Bernhard Aringer
Affiliation:
Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova, Italy
Bernd Freytag
Affiliation:
Institutionen för fysik och astronomi, Uppsala Universitet, Sweden
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Abstract

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TIGvival 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 TIGvival 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.

Keywords

stars: AGB and post-AGBmolecular processestechniques: spectroscopic
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 548 - 549
Copyright
© International Astronomical Union 2019 

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