Hyperfine excitation of 13CCH and C13CH by collisions with para- H2

P Pirlot Jankowiak; F Lique; P J Dagdigian

doi:10.1093/mnras/stad1646

Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2023

Hyperfine excitation of 13CCH and C13CH by collisions with para- H2

(1) , (1) , (2)

1
2

P Pirlot Jankowiak

Fonction : Auteur
PersonId : 747994
IdHAL : paul-pirlot
ORCID : 0000-0002-7454-2297

Institut de Physique de Rennes

F Lique

Fonction : Auteur
PersonId : 179898
IdHAL : francois-lique
ORCID : 0000-0002-0664-2536
IdRef : 111150221

Institut de Physique de Rennes

P J Dagdigian

Fonction : Auteur

Johns Hopkins University

Résumé

ABSTRACT The computation of hyperfine resolved cross sections and rate coefficients for open-shell molecules in collision with H2 is a true methodological and numerical challenge. Such collisional data are however required to interpret astrophysical observations. We report the first hyperfine resolved rate coefficients for (de-)excitation of 13CCH and C13CH isotopologues induced by collisions with para-H2. These calculations have been performed using a recently published C2H–H2 potential energy surface. Hyperfine resolved cross sections and rate coefficients between the first 98 energy levels of the two isotopologues were determined using a recoupling technique for temperatures ranging from 5 to 100 K. Significant isotopic substitution effects were found, showing the necessity of computing isotopologue specific collisional data. These rate coefficents have then been used in a simple radiative transfer modelling for typical molecular cloud conditions.

Mots clés

molecular data -molecular processes -radiative transfer

Domaines

Astrophysique [astro-ph] Astrophysique [astro-ph] Physique Quantique [quant-ph]

Fichier principal

isotopologues.pdf (547.11 Ko)

FS_DN=Dj=1.pdf (20.33 Ko)

FS_DN=Dj=2.pdf (21.5 Ko)

FS_nodelta.pdf (20.33 Ko)

HFS_13c_10K.pdf (29.49 Ko)

HFS_DN=.=Dj=DF1=DF.pdf (17.43 Ko)

HFS_DN=Dj=DF1=DF.pdf (16.42 Ko)

HFS_Dj+-1_DF1+-1=DF.pdf (17.31 Ko)

README.pdf (48.55 Ko)

TEX_10K.pdf (18.94 Ko)

TEX_1_0.5-0_0.5_30K_maser.pdf (18.14 Ko)

TEX_30K.pdf (18.52 Ko)

TEX_50K_maser.pdf (22.3 Ko)

TR_13c_10K.pdf (15.65 Ko)

TR_13c_30K.pdf (15.59 Ko)

isotopologues (1).pdf (547.11 Ko)

isotopologues.synctex.gz (170.18 Ko)

jacobi_shift_plusminus.png (36.66 Ko)

legacy.pdf (36.01 Ko)

syst_HFSrec_sios_10_50K_withquasi.pdf (21.15 Ko)

syst_HFSrec_sph_10-50K.pdf (27.76 Ko)

v00.pdf (15.25 Ko)

v10.pdf (14.58 Ko)

v20.pdf (15.08 Ko)

v30.pdf (14.51 Ko)

Origine	Fichiers produits par l'(les) auteur(s)

Paul PIRLOT : Connectez-vous pour contacter le contributeur

https://hal.science/hal-04159100

Soumis le : mardi 11 juillet 2023-16:06:16

Dernière modification le : lundi 30 septembre 2024-14:46:17

Dates et versions

hal-04159100 , version 1 (11-07-2023)

Identifiants

HAL Id : hal-04159100 , version 1
DOI : 10.1093/mnras/stad1646

Citer

P Pirlot Jankowiak, F Lique, P J Dagdigian. Hyperfine excitation of 13CCH and C13CH by collisions with para- H2. Monthly Notices of the Royal Astronomical Society, 2023, 523 (3), pp.3732-3740. ⟨10.1093/mnras/stad1646⟩. ⟨hal-04159100⟩

Exporter

BibTeX XML-TEI Dublin Core DC Terms EndNote DataCite

Collections

UNIV-RENNES1 CNRS OSUR IPR IPR-PMOL GENCI UR1-UFR-SPM UNIV-RENNES UR1-MMS

18 Consultations

78 Téléchargements

Hyperfine excitation of 13CCH and C13CH by collisions with para- H2

Résumé

Mots clés

Domaines

Dates et versions

Identifiants

Citer

Exporter

Collections

Altmetric

Partager