000002758 001__ 2758
000002758 005__ 20160701171710.0
000002758 037__ $$aASTROimport-915
000002758 100__ $$aLobel, A.
000002758 245__ $$aLong-term Spectroscopic Monitoring of Cool Hypergiants HR 8752, IRC+10420, and 6 Cas near the Yellow Evolutionary Void
000002758 260__ $$c2013
000002758 520__ $$aWe discuss the spectral variability of three white (A-type) hypergiants (Ia+) near the region of atmospheric dynamical instability in the upper H-R diagram, called the Yellow Evolutionary Void. The Void represents an obstacle for the fast blueward evolution of the most massive cool hypergiant stars. Optical and near-IR spectra observed between 1993 and 2011 with several high-resolution spectrographs, including the WHT-Utrecht Echelle Spectrograph, Mercator-HERMES, NOT-Sofin, and Keck-HIRES, are compared to investigate the wind-physics and -dynamics of the hypergiants. 
000002758 700__ $$a de Jager, K.
000002758 700__ $$a Nieuwenhuijzen, H.
000002758 773__ $$c167$$p370 Years of Astronomy in Utrecht$$v470$$y2013
000002758 85642 $$ahttp://esoads.eso.org/abs/2013ASPC..470..167L
000002758 905__ $$apublished in
000002758 980__ $$aNONREF