GUÉLIN, M.; BROUILLET, N.; CERNICHARO, J.; COMBES, F.; WOOTEN, A.

doi:10.1007/S10509-007-9684-4

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GUÉLIN, M.
Institut de RadioAstronomie Millimétrique [IRAM]

BROUILLET, N.
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]

CERNICHARO, J.
Centro de Investigaciones Biológicas [CSIC]
Departamento de Astrofísica Molecular e Infrarroja [DAMIR]

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Astrophysics and Space Science. 2008, vol. 313, p. 45-51

Springer Verlag

Résumé en anglais

High angular resolution mm-wave observations of the Orion-KL region, made with the IRAM Plateau de Bure interferometer (PdBI), reveal the presence of several cores of size 103 AU, which have distinct spectral signatures. Complex molecules such as ethanol, vinyl cyanide and dimethyl ether show different distributions and their relative abundance varies from core to core by orders of magnitude. The molecular column densities derived in the cores also differ widely from the beam-averaged column densities observed with large single-dish telescopes. Obviously, the predictions of hot core chemistry models must be checked against high resolution observations. ALMA, which allies sensitivity and high angular resolution, will be a key instrument for this type of studies. The PdBI observations were part of a search for interstellar glycine, also carried out with the IRAM 30-m telescope and the Green Bank Telescope. We derive a 3 ? upper limit on the column density of glycine of 1×1015 cm?2 per 2?×3? beam in the Orion Hot Core and Compact Ridge.< Réduire

Mots clés en anglais

Astrochemistry

Astrobiology

Line: identification

Molecular processes

Techniques: high angular resolution

ISM: abundances

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Unveiling the chemistry of hot protostellar cores with ALMA

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Mots clés en anglais

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