Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...357..359c&link_type=abstract
Astronomy and Astrophysics, v.357, p.359-366 (2000)
Astronomy and Astrophysics
Astrophysics
21
Comets: Individual: C/1995 O1 Hale-Bopp, Comets: General
Scientific paper
The subject of this paper is the attempt to reproduce the CO observed production rate curve of comet Hale-Bopp with a numerical model of the nucleus thermal evolution and chemical differentiation. Three possible mechanisms can contribute to the total measured CO production: 1) sublimation of CO from the nucleus; 2) release of gas of CO trapped in the amorphous water ice in the nucleus; 3) emission of CO from grains in the inner coma (diffuse source). To match production rate observations with a numerical model we need an interplay between these emission mechanisms: success (and failure) in reproducing observed curve gives us useful information about the relative importance of these mechanisms and the depth of sublimation front. Using a numerical model of the nucleus we were able to match the observed CO production curve using quite standard initial parameters. We verified that it is impossible to reproduce the observed CO production curve taking solely into account sublimation of CO from ice contained in the nucleus or the release of gas of CO trapped in the amorphous water ice: if amorphous ice is not present immediately below the surface, we have to invoke some other physical process resulting in a perihelion CO production peak, such as a distributed source in the coma and/or the release of some of the trapped CO during water ice sublimation.
Capria Maria Teresa
Coradini Angioletta
de Sanctis Maria Cristina
Orosei Roberto
No associations
LandOfFree
CO emission mechanisms in C/1995 O1 (Hale-Bopp) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with CO emission mechanisms in C/1995 O1 (Hale-Bopp), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CO emission mechanisms in C/1995 O1 (Hale-Bopp) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1121502