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Gilles Alphonse Durand; Vincent Minier; Pierre-Olivier Lagage; Emanuele Daddi; Samir El Khouloudi; Nicola Schneider-Bontemps; Michel Talvard; Christian Veyssière; Gilles André Durand; Christian Walter; Lucia Sabbatini; Zalpha Challita; John W. (2008). Toward a large telescope facility for submm/FIR astronomy at Dome C (Vol. 7012).
Abstract: Submillimetre astronomy is the prime technique to unveil the birth and early evolution of stars and galaxies in the local and distant Universe. Preliminary meteorological studies and atmospheric transmission models tend to demonstrate that Dome C might offer atmosphere conditions that open the 200-µm atmospheric windows, and could potentially be a site for a large ground-based telescope facility. However, Antarctic climate conditions might also severely impact and deform any telescope mirror and hardware. We present prerequisite conditions and their associate experiments for defining a large telescope facility for submillimetre astronomy at Dome C: (1) Whether the submm/THz atmospheric windows open from 200 µm during a large and stable fraction of time; (2) The knowledge of thermal gradient and (3) icing formation and their impact on a telescope mirror and hardware. This paper will present preliminary results on current experiments that measure icing, thermal gradient and sky opacity at Dome C. We finally discuss a possible roadmap toward the deployment of a large telescope facility at Dome C.
Programme: 1040
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Thouzeau C., Le Maho Y., Froget G., Sabatier L., Le Bohec C., Hoffmann J. & Bulet P. (2004). Spheniscins: avian beta-defensins in preserved stomach content of king penguin, Aptenodytes patagonicus. J. Biol. Chem., 278(51), 51053–51058.
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Drinkwater M.R., Long D.G. & Bingham A.W. (2001). Greenland Snow Accumulation Estimates from Scatterometer Data,. J. Geophys. Res., 106(d24), 33935–33950.
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Ritz C., Rommelaere V. & Dumas C. (2001). Modeling the evolution of Antarctic ice sheet over the last 420000 years: implications for altitude changes in the Vostok region. J. Geophys. Res., 106(d23), 31943–31964.
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Basile I., Petit J.R., Touron S., Grousset F.E. & Barkov N.I. (2001). Volcanic layers in Antarctic (Vostok) ice-cores : source identification and atmospheric implications. J. Geophys. Res., 106(d23), 31915–31931.
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Caillon N., Severinghaus J.P., Barnola J.M., Chappellaz J., Jouzel J. & Parrenin F. (2001). Estimation of temperature change and of gas age – ice age difference, 108kyr BP, at Vostok, Antarctica. J. Geophys. Res., 106(d23), 31893–31902.
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Pepin L., Raynaud D., Barnola J.M.. & Loutre M.F. (2001). Hemispheric roles of climate forcings during glacial-interglacial transitions, as decuced from the Vostok record and LLN-2D model experiments. J. Geophys. Res., 106(d23), 31885–31892.
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Vimeux F., Masson V., Delaygue G., Jouzel J., Petit J.R. , Stievenard M., Vaikmae R. & White J.W.C. (2001). A 420,000 year deuterium excess record from East Antarctica : Information on past changes in the origin of precipitation at Vostok. J. Geophys. Res., 106(d23), 31863–31873.
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Parrenin F., Jouzel J., Waelbroeck C., Ritz C. & Barnola J.M. (2001). Dating the Vostok ice core by an inverse method. J. Geophys. Res., 106(d23), 31837–31851.
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Jaffrezo J.L., Davidson C.I, Kuhns H.D., Bergin M.H., Hillamo R., Maenhaut W., Kahl J.W.D. & Harris N.R.P. (1998). Biomass burning signatures in the atmosphere of central Greenland. J. Geophys. Res., 103(d23), 31067–31078.
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