Browsing by Subject "circumstellar matter"

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    The Spitzer spectroscopic survey of S-type stars
    (2012) Smolders, K; Neyskens, P; Blommaert, J A D L; Hony, S; Van Winckel, H; Decin, L; Van Eck, S; Sloan, G C; Cami, J; Uttenthaler, S; Degroote, P; Barry, D; Feast, M; Groenewegen, M A T; Matsuura, M; Menzies, J; Sahai, R; van Loon, J Th; Zijlstra, A A; Acke, B; Bloemen, S; Cox, N; de Cat, P; Desmet, M; Exter, K; Ladjal, D; Østensen, R; Saesen, S; van Wyk, F; Verhoelst, T; Zima, W
    Context. S-type AGB stars are thought to be in the transitional phase between M-type and C-type AGB stars. Because the composition of the circumstellar environment reflects the photospheric abundances, one may expect a strong influence of the stellar C/O ratio on the molecular chemistry and the mineralogy of the circumstellar dust.
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    The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase
    (2014) Chesneau, O; Meilland, A; Chapellier, E; Millour, F; van Genderen, A M; Nazé, Y; Smith, N; Spang, A; Smoker, J V; Dessart, L; Kanaan, S; Bendjoya, Ph; Feast, M W; Groh, J H; Lobel, A; Nardetto, N; Otero, S; Oudmaijer, R D; Tekola, A G; Whitelock, P A; Arcos, C; Curé, M; Vanzi, L
    Context. Only a few stars are caught in the very brief and often crucial stages when they quickly traverse the Hertzsprung-Russell diagram, and none has yet been spatially resolved in the mass transfer phase.