13C-METHYL Formate in Orion-Kl Alma ...
Type de document :
Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes
Titre :
13C-METHYL Formate in Orion-Kl Alma Observations and Spectroscopic Characterization
Auteur(s) :
Favre, C. [Auteur]
Centre de Recherche en Cancérologie de Marseille [CRCM]
Carvajal, Miguel, [Auteur]
Field, David [Auteur]
Centre for Ecology and Hydrology [Wallingford] [CEH]
Oxford e-Research Centre [Oxford]
Bergin, Edwin, [Auteur]
Department of Astronomy [Ann Arbor]
Neill, Justin, [Auteur]
Crockett, Nathan, [Auteur]
Jørgensen, Jes, [Auteur]
Bisschop, Suzanne, [Auteur]
Brouillet, N. [Auteur]
Despois, D. [Auteur]
Baudry, Alain [Auteur]
Kleiner, Isabelle, [Auteur]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Margulès, L., [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Huet, Therese [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Demaison, Jean, [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Centre de Recherche en Cancérologie de Marseille [CRCM]
Carvajal, Miguel, [Auteur]
Field, David [Auteur]
Centre for Ecology and Hydrology [Wallingford] [CEH]
Oxford e-Research Centre [Oxford]
Bergin, Edwin, [Auteur]
Department of Astronomy [Ann Arbor]
Neill, Justin, [Auteur]
Crockett, Nathan, [Auteur]
Jørgensen, Jes, [Auteur]
Bisschop, Suzanne, [Auteur]
Brouillet, N. [Auteur]
Despois, D. [Auteur]
Baudry, Alain [Auteur]
Kleiner, Isabelle, [Auteur]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Margulès, L., [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Huet, Therese [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Demaison, Jean, [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Titre de la manifestation scientifique :
2014isms.confETF06F - 69th International Symposium on Molecular Spectroscopy: June 16-20, 2014 at The University of Illinois at Urbana-Champaign. Talk TF06
Ville :
Urbana-Champaign
Pays :
Etats-Unis d'Amérique
Date de début de la manifestation scientifique :
2014-06-16
Date de publication :
2014-06
Discipline(s) HAL :
Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
Résumé en anglais : [en]
Determination of elemental isotopic ratios is valuable for understanding the chemical evolution of interstellar material. Until now the 12C/13C ratio has predominantly been measured in simple species such as CO, CN and ...
Lire la suite >Determination of elemental isotopic ratios is valuable for understanding the chemical evolution of interstellar material. Until now the 12C/13C ratio has predominantly been measured in simple species such as CO, CN and H2CO and, becomes larger with increasing distance from the Galactic Center. We have investigated the carbon isotopic ratio for methyl formate HCOOCH3, and its isotopologues H13COOCH3 and HCOO13CH3 addressing the issue whether the 12C/13C ratio is the same for both simple and large molecules. Using ALMA science verification observations of Orion-KL and the spectroscopic characterization of the complex H13COOCH3 and HCOO13CH3 species that we have performed, we have 1) confirmed the detection of the 13C-methyl formate species in Orion-KL and, 2) image for the first time their spatial distribution. I will present some of these results. In particular, our analysis shows that the 12C/13C isotope ratio in methyl formate toward the Compact Ridge and Hot Core-SW components that are associated with Orion-KL are, for both the 13C-methyl formate isotopologues, commensurate with the well-known 12C/13C ratio of the simple species CO. Our findings suggest that grain surface chemistry very likely prevails in the formation of methyl formate main and 13C isotopologues.Lire moins >
Lire la suite >Determination of elemental isotopic ratios is valuable for understanding the chemical evolution of interstellar material. Until now the 12C/13C ratio has predominantly been measured in simple species such as CO, CN and H2CO and, becomes larger with increasing distance from the Galactic Center. We have investigated the carbon isotopic ratio for methyl formate HCOOCH3, and its isotopologues H13COOCH3 and HCOO13CH3 addressing the issue whether the 12C/13C ratio is the same for both simple and large molecules. Using ALMA science verification observations of Orion-KL and the spectroscopic characterization of the complex H13COOCH3 and HCOO13CH3 species that we have performed, we have 1) confirmed the detection of the 13C-methyl formate species in Orion-KL and, 2) image for the first time their spatial distribution. I will present some of these results. In particular, our analysis shows that the 12C/13C isotope ratio in methyl formate toward the Compact Ridge and Hot Core-SW components that are associated with Orion-KL are, for both the 13C-methyl formate isotopologues, commensurate with the well-known 12C/13C ratio of the simple species CO. Our findings suggest that grain surface chemistry very likely prevails in the formation of methyl formate main and 13C isotopologues.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Source :