@Article{Hartogh_etal2010,
author="Hartogh, P.
and Crovisier, J.
and de Val-Borro, M.
and Bockel{\'e}e-Morvan, D.
and Biver, N.
and Lis, D. C.
and Moreno, R.
and Jarchow, C.
and Rengel, M.
and Emprechtinger, M.
and Szutowicz, S.
and Banaszkiewicz, M.
and Bensch, F.
and Blecka, M. I.
and Cavali{\'e}, T.
and Encrenaz, T.
and Jehin, E.
and K{\"u}ppers, M.
and Lara, L-M
and Lellouch, E.
and Swinyard, B. M.
and Vandenbussche, B.
and Bergin, E. A.
and Blake, G. A.
and Blommaert, J. A. D. L.
and Cernicharo, J.
and Decin, L.
and Encrenaz, P.
and de Graauw, T.
and Hutsemekers, D.
and Kidger, M.
and Manfroid, J.
and Medvedev, A. S.
and Naylor, D. A.
and Schieder, R.
and Thomas, N.
and Waelkens, C.
and Roelfsema, P. R.
and Dieleman, P.
and G{\"u}sten, R.
and Klein, T.
and Kasemann, C.
and Caris, M.
and Olberg, M.
and Benz, A. O.",
title="HIFI observations of water in the atmosphere of comet C/2008 Q3 (Garradd)",
journal="Astron. Astrophys.",
year="2010",
volume="518",
pages="L150 (1 to 5)",
optkeywords="HEB mixer applications; HIFI; Herschel; comets: individual: C/2008 Q3 / radio lines: general / submillimeter: general / techniques: spectroscopic",
abstract="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 212--101 (1669 GHz) ortho and 111--000 (1113 GHz) para transitions of water in a cometary spectrum. In addition, the ground-state transition 110--101 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 {\texttimes} 1028 s-1 over the range rh = 1.83--1.85 AU.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1088), last updated on Wed, 15 Jun 2016 18:53:51 -0500",
doi="10.1051/0004-6361/201014665",
opturl="https://doi.org/10.1051/0004-6361/201014665"
}