title: The interstellar chemistry of H2C3O isomers.
abstract: We present the detection of two H2C3O isomers, propynal and cyclopropenone, toward various starless cores and molecular clouds, together with upper limits for the third isomer propadienone. We review the processes controlling the abundances of H2C3O isomers in interstellar media showing that the reactions involved are gas-phase ones. We show that the abundances of these species are controlled by kinetic rather than thermodynamic effects.
authors.affiliation: Univ. Bordeaux, ISM, UMR 5255, F-33400 Talence, France; CNRS, ISM, UMR 5255, F-33400 Talence, France.
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Loison
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, C\ Sor Juana Inés de la Cruz 3, 28049 Cantoblanco, Spain.
authors.forename: Marcelino
authors.initials: M
authors.lastname: Agúndez
authors.affiliation: INAF, Osservatorio di Radioastronomia, via P. Gobetti 101, 40129 Bologna, Italy.
authors.forename: Núria
authors.initials: N
authors.lastname: Marcelino
authors.affiliation: Univ. Bordeaux, LAB, UMR 5804, F-33270, Floirac, France; CNRS, LAB, UMR 5804, F-33270, Floirac, France.
authors.forename: Valentine
authors.initials: V
authors.lastname: Wakelam
authors.affiliation: Univ. Bordeaux, ISM, UMR 5255, F-33400 Talence, France; CNRS, ISM, UMR 5255, F-33400 Talence, France.
authors.forename: Kevin M
authors.initials: KM
authors.lastname: Hickson
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, C\ Sor Juana Inés de la Cruz 3, 28049 Cantoblanco, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Cernicharo
authors.affiliation: LERMA, Observatoire de Paris, École Normale Supérieure, PSL Research University, CNRS, UMR8112, F-75014, Paris, France.
authors.forename: Maryvonne
authors.initials: M
authors.lastname: Gerin
authors.affiliation: LERMA, Observatoire de Paris, PSL Research University, CNRS, UMR8112, Place Jules Janssen, 92190 Meudon, France.
authors.forename: Evelyne
authors.initials: E
authors.lastname: Roueff
authors.affiliation: Institut de Radioastronomie Millimétrique, 300 rue de la Piscine, 38046, St. Martin d'Heres, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Guélin