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000002692 005__ 20160701171709.0
000002692 0247_ $$2DOI$$a10.1051/eas/1571062
000002692 037__ $$aASTROimport-849
000002692 100__ $$aLobel, A.
000002692 245__ $$aYellow Hypergiants: A Comparative Study of HR 5171A, Rho Cas, and HR 8752
000002692 260__ $$c2015
000002692 520__ $$aWe present a comparative study of the detailed spectroscopic variability of selected Fe i absorption lines observed between 1991 and 1995 in the optical spectra of the bright yellow hypergiants HR 5171A and Rho Cas. We also compare with the high-resolution spectrum of HR 8752. The three cool hypergiants reveal broad lines with very similar shapes. The variations with time in the line shapes and depths of HR 5171A and Rho Cas are very similar. The spectroscopic variability is caused by quasi-periodic atmospheric pulsations that strongly correlates with the observed radial velocity and V-brightness changes. 
000002692 700__ $$a de Jager, C.
000002692 700__ $$a Nieuwenhuijzen, H.
000002692 700__ $$a van Genderen, A. M.
000002692 700__ $$a Oudmaijer, R.
000002692 773__ $$c279-280$$pEAS Publications Series$$v71$$y2015
000002692 85642 $$ahttp://esoads.eso.org/abs/2015EAS....71..279L
000002692 905__ $$apublished in
000002692 980__ $$aNONREF