2018/11/16 by Dieter Engels, Engels, Dieter, Sandra Etoka +3
Physics and Astronomy · #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1811.06906
2 pages, no figures, to appear in IAUS 343, Why Galaxies Care about AGB Stars, F. Kerschbaum, M. Groenewegen \& H. Olofsson, eds
arxiv created 2018/11/16 · arxiv updated 2018/11/19
Since 2013 we are performing with the Nancay Radio Telescope (NRT) a monitoring program of >100 Galactic disk OH/IR stars, having bright 1612-MHz OH maser emission. The variations of the maser emission are used to probe the underlying stellar variability. We wish to understand how the large-amplitude variations are lost during the AGB - post-AGB transition. The fading out of pulsations with steadily declining amplitudes seems to be a viable process.