Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

29 March 2024
 
  » arxiv » 1007.0149

 Article overview


Water production in comet 81P/Wild 2 as determined by Herschel/HIFI
M. de Val-Borro ; P. Hartogh ; J. Crovisier ; D. Bockelée-Morvan ; N. Biver ; D. C. Lis ; R. Moreno ; C. Jarchow ; M. Rengel ; S. Szutowicz ; M. Banaszkiewicz ; F. Bensch ; M. I. Błęcka ; M. Emprechtinger ; T. Encrenaz ; E. Jehin ; M. Küppers ; L.-M. Lara ; E. Lellouch ; B. M. Swinyard ; B. Vandenbussche ; E. A. Bergin ; G. A. Blake ; J. A. D. L. Blommaert ; J. Cernicharo ; L. Decin ; P. Encrenaz ; T. de Graauw ; D. Hutsemékers ; M. Kidger ; J. Manfroid ; A. S. Medvedev ; D. A. Naylor ; R. Schieder ; D. Stam ; N. Thomas ; C. Waelkens ; R. Szczerba ; P. Saraceno ; A. M. Di Giorgio ; S. Philipp ; T. Klein ; V. Ossenkopf ; P. Zaal ; R. Shipman ;
Date 1 Jul 2010
AbstractThe high spectral resolution and sensitivity of Herschel/HIFI allows for the detection of multiple rotational water lines and accurate determinations of water production rates in comets. In this letter we present HIFI observations of the fundamental 110-101 (557 GHz) ortho and 111-000 (1113 GHz) para rotational transitions of water in comet 81P/Wild 2 acquired in February 2010. We mapped the extent of the water line emission with five point scans. Line profiles are computed using excitation models which include excitation by collisions with electrons and neutrals and solar infrared radiation. We derive a mean water production rate of $1.0 imes 10^{28}$ molecules s$^{-1}$ at a heliocentric distance of 1.61 AU about 20 days before perihelion, in agreement with production rates measured from the ground using observations of the 18-cm OH lines. Furthermore, we constrain the electron density profile and gas kinetic temperature, and estimate the coma expansion velocity by fitting the water line shapes.
Source arXiv, 1007.0149
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica