HARTOGH, P.; CROVISIER, J.; DE VAL-BORRO, M.; BOCKELÉE-MORVAN, D.; BIVER, N.; LIS, D. C.; MORENO, R.; JARCHOW, C.; RENGEL, M.; EMPRECHTINGER, M.; SZUTOWICZ, S.; BANASZKIEWICZ, M.; BENSCH, F.; BLECKA, M. I.; CAVALIÉ, T.; ENCRENAZ, T.; JEHIN, E.; KÜPPERS, M.; LARA, L. -M.; LELLOUCH, E.; SWINYARD, B. M.; VANDENBUSSCHE, B.; BERGIN, E. A.; BLAKE, G. A.; BLOMMAERT, J. A. D. L.; CERNICHARO, J.; DECIN, L.; ENCRENAZ, P.; DE GRAAUW, T.; HUTSEMEKERS, D.; KIDGER, M.; MANFROID, J.; MEDVEDEV, A. S.; NAYLOR, D. A.; SCHIEDER, R.; THOMAS, N; WAELKENS, C.; ROELFSEMA, P. R.; DIELEMAN, P.; GUESTEN, R.; KLEIN, T.; KASEMANN, C.; CARIS, M.; OLBERG, M.; BENZ, A. O.

doi:10.1051/0004-6361/201014665

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

HARTOGH, P.
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]

CROVISIER, J.
Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]

DE VAL-BORRO, M.

Idioma

Article de revue

Este ítem está publicado en

Astronomy and Astrophysics - A&A. 2010, vol. 518, p. L150

EDP Sciences

Resumen en inglés

High-resolution far-infrared and sub-millimetre spectroscopy of water lines is an important tool to understand the physical and chemical properties of cometary atmospheres. We present observations of several rotational ortho- and para-water transitions in comet C/2008 Q3 (Garradd) performed with HIFI on Herschel. These observations have provided the first detection of the 2_{12}-1_{01} (1669 GHz) ortho and 1_{11}-0_{00} (1113 GHz) para transitions of water in a cometary spectrum. In addition, the ground-state transition 1_{10}-1_{01} at 557 GHz is detected and mapped. By detecting several water lines quasi-simultaneously and mapping their emission we can constrain the excitation parameters in the coma. Synthetic line profiles are computed using excitation models which include excitation by collisions, solar infrared radiation, and radiation trapping. We obtain the gas kinetic temperature, constrain the electron density profile, and estimate the coma expansion velocity by analyzing the map and line shapes. We derive water production rates of 1.7-2.8 x 10^{28} s^{-1} over the range r_h = 1.83-1.85 AU.< Leer menos

Palabras clave en español

comets: individual: C/2008 Q3

radio lines: general

submillimeter: general

techniques: spectroscopic

Metadatos

Licencia de uso del documento

HIFI Observations of Water in the Atmosphere of Comet C/2008 Q3 (Garradd)

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en español

DOI

Orígen

Centros de investigación