First rate coefficients for an interstellar anion: application to the CN−–H2 collisional system
Identifieur interne : 000829 ( Main/Exploration ); précédent : 000828; suivant : 000830First rate coefficients for an interstellar anion: application to the CN−–H2 collisional system
Auteurs : J. Kłos [États-Unis] ; F. Lique [France]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2011-11-21.
English descriptors
- KwdEn :
Abstract
Recently, several molecular anions have been detected in the interstellar medium. Accurate modelling of their microwave emission spectra requires the calculation of rates for rotational excitations by collisions with the most abundant species. We report the first collisional data for an interstellar anion, the rate coefficients for the rotational excitation of CN− by H2. State‐to‐state rate coefficients between the 11 lowest rotational levels of CN− were calculated for temperatures ranging from 5 to 100 K. Collisions with para‐ and ortho‐H2 are taken into account. The CN− rate coefficients are compared with those of the neutral CO molecule, and, as expected, it is found that the rate coefficients for the anion are significantly larger than those of the neutral species. The new set of rate coefficients will help significantly in the interpretation of the CN− emission lines observed with current and future telescopes, and enable this molecule to become a powerful astrophysical tool.
Url:
DOI: 10.1111/j.1365-2966.2011.19481.x
Affiliations:
- France, États-Unis
- Haute-Normandie, Maryland, Région Normandie
- College Park (Maryland), Le Havre
- Université du Havre, Université du Maryland
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000A82
- to stream Istex, to step Curation: 000A82
- to stream Istex, to step Checkpoint: 000116
- to stream Main, to step Merge: 000830
- to stream Main, to step Curation: 000829
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">First rate coefficients for an interstellar anion: application to the CN−–H2 collisional system</title><author><name sortKey="Klos, J" sort="Klos, J" uniqKey="Klos J" first="J." last="Kłos">J. Kłos</name></author><author><name sortKey="Lique, F" sort="Lique, F" uniqKey="Lique F" first="F." last="Lique">F. Lique</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:925D76D9111EC41E7016565DA0617159C89906D2</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1111/j.1365-2966.2011.19481.x</idno><idno type="url">https://api.istex.fr/document/925D76D9111EC41E7016565DA0617159C89906D2/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000A82</idno><idno type="wicri:Area/Istex/Curation">000A82</idno><idno type="wicri:Area/Istex/Checkpoint">000116</idno><idno type="wicri:doubleKey">0035-8711:2011:Klos J:first:rate:coefficients</idno><idno type="wicri:Area/Main/Merge">000830</idno><idno type="wicri:Area/Main/Curation">000829</idno><idno type="wicri:Area/Main/Exploration">000829</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">First rate coefficients for an interstellar anion: application to the CN−–H2 collisional system</title><author><name sortKey="Klos, J" sort="Klos, J" uniqKey="Klos J" first="J." last="Kłos">J. Kłos</name><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742</wicri:regionArea><placeName><region type="state">Maryland</region><settlement type="city">College Park (Maryland)</settlement></placeName><orgName type="university">Université du Maryland</orgName></affiliation></author><author><name sortKey="Lique, F" sort="Lique, F" uniqKey="Lique F" first="F." last="Lique">F. Lique</name><affiliation wicri:level="4"><country xml:lang="fr">France</country><wicri:regionArea>LOMC ‐ FRE 3102, CNRS‐Université du Havre, 25 rue Philippe Lebon, BP 540, 76058 Le Havre</wicri:regionArea><placeName><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region><settlement type="city">Le Havre</settlement></placeName><orgName type="university">Université du Havre</orgName></affiliation></author></analytic><monogr></monogr><series><title level="j">Monthly Notices of the Royal Astronomical Society</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-11-21">2011-11-21</date><biblScope unit="volume">418</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="271">271</biblScope><biblScope unit="page" to="275">275</biblScope></imprint><idno type="ISSN">0035-8711</idno></series><idno type="istex">925D76D9111EC41E7016565DA0617159C89906D2</idno><idno type="DOI">10.1111/j.1365-2966.2011.19481.x</idno><idno type="ArticleID">MNR19481</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>molecular data</term><term>molecular processes</term><term>scattering</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Recently, several molecular anions have been detected in the interstellar medium. Accurate modelling of their microwave emission spectra requires the calculation of rates for rotational excitations by collisions with the most abundant species. We report the first collisional data for an interstellar anion, the rate coefficients for the rotational excitation of CN− by H2. State‐to‐state rate coefficients between the 11 lowest rotational levels of CN− were calculated for temperatures ranging from 5 to 100 K. Collisions with para‐ and ortho‐H2 are taken into account. The CN− rate coefficients are compared with those of the neutral CO molecule, and, as expected, it is found that the rate coefficients for the anion are significantly larger than those of the neutral species. The new set of rate coefficients will help significantly in the interpretation of the CN− emission lines observed with current and future telescopes, and enable this molecule to become a powerful astrophysical tool.</div></front></TEI><affiliations><list><country><li>France</li><li>États-Unis</li></country><region><li>Haute-Normandie</li><li>Maryland</li><li>Région Normandie</li></region><settlement><li>College Park (Maryland)</li><li>Le Havre</li></settlement><orgName><li>Université du Havre</li><li>Université du Maryland</li></orgName></list><tree><country name="États-Unis"><region name="Maryland"><name sortKey="Klos, J" sort="Klos, J" uniqKey="Klos J" first="J." last="Kłos">J. Kłos</name></region></country><country name="France"><region name="Région Normandie"><name sortKey="Lique, F" sort="Lique, F" uniqKey="Lique F" first="F." last="Lique">F. Lique</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/France/explor/LeHavreV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000829 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000829 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/France
|area= LeHavreV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:925D76D9111EC41E7016565DA0617159C89906D2
|texte= First rate coefficients for an interstellar anion: application to the CN−–H2 collisional system
}}
| This area was generated with Dilib version V0.6.25. |  |