Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.471..439b&link_type=abstract
In: 15th ESA Symposium on European Rocket and Balloon Programmes and Related Research, 28 - 31 May 2001, Biarritz, France. Ed.:
Astronomy and Astrophysics
Astronomy
Experiments: Balloon-Borne, Star-Forming Regions, Sunyaev-Zel'Dovich Effect
Scientific paper
The high sensitivity sub-millimetre observations performed with the French balloon-borne experiment PRONAOS have brought exciting and sometimes unexpected new astronomical results. In particular, they have lead to the first detection of the Sunyaev-Zel'dovich effect in its positive part, toward the galaxy cluster A2163. They also have revealed the existence of cold condensations in different sites of star forming regions and toward thin dust clouds at high galactic latitude. This cannot be explained by the standard dust models currently used and could be interpreted as the existence of fractal dust aggregates. The PRONAOS observations have also evidenced a significant correlation between the dust equilibrium temperature and the spectral emissivity index, which may reflect new quantum processes within the grains specific to low temperatures. These results have raised a number of new questions which will be addressed using future balloon-borne projects such as ELISA and the space mission Planck and Herschel.
Bernard J.-Ph.
Dupac Xavier
Giard Martin
Lamarre Jean-Michel
Mény Claude
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