Atomic Carbon in Galaxies
- M. Gerin, T. Phillips
- Physics
- 1 August 1999
We present new measurements of the ground-state fine-structure line of atomic carbon at 492 GHz in a variety of nearby external galaxies, ranging from spiral to irregular, interacting, and merging…
ISOCAM-CVF 5-12 Micron Spectroscopy of Ultraluminous Infrared Galaxies
- Q. D. Tran, D. Lutz, M. Ward
- Physics
- 11 January 2001
We present low-resolution mid-infrared (MIR) spectra of 16 ultraluminous infrared galaxies (ULIRGs) obtained with the circular variable filter (CVF) spectroscopy mode of ISOCAM on board the Infrared…
DISCOVERY OF THE METHOXY RADICAL, CH3O, TOWARD B1: DUST GRAIN AND GAS-PHASE CHEMISTRY IN COLD DARK CLOUDS
- J. Cernicharo, N. Marcelino, È. Roueff, M. Gerin, A. Jiménez-Escobar, G. M. Muñoz Caro
- Physics
- 10 November 2012
We report on the discovery of the methoxy radical (CH3O) toward the cold and dense core B1-b based on the observation, with the IRAM 30 m radio telescope, of several lines at 3 and 2 mm wavelengths.…
HERSCHEL SURVEY OF GALACTIC OH+, H2O+, AND H3O+: PROBING THE MOLECULAR HYDROGEN FRACTION AND COSMIC-RAY IONIZATION RATE
- N. Indriolo, D. Neufeld, F. Wyrowski
- Physics
- 2 December 2014
In diffuse interstellar clouds the chemistry that leads to the formation of the oxygen-bearing ions OH+, H2O+, and H3O+ begins with the ionization of atomic hydrogen by cosmic rays, and continues…
Detection of Triply Deuterated Ammonia in the Barnard 1 Cloud
- D. Lis, È. Roueff, P. Schilke
- Physics
- 19 April 2002
We report the detection of the ground-state rotational transition JK = 10 → 00 (0a → 0s) of triply deuterated ammonia at 309.91 GHz in the Barnard 1 cloud, obtained with the Caltech Submillimeter…
The ionization fraction gradient across the Horsehead edge: an archetype for molecular clouds
- J. Goicoechea, J. Pety, Luth
- Physics
- 16 February 2009
Context. The ionization fraction (i.e., the electron abundance) plays a key role in the chemistry and dynamics of molecular clouds. Aims. We study the H 13 CO + ,D CO + and HOC + line emission…
The anatomy of the Orion B Giant Molecular Cloud: A local template for studies of nearby galaxies
- J. Pety, V. Guzm'an, A. Sievers
- Physics
- 12 November 2016
We aim to develop the Orion B Giant Molecular Cloud (GMC) as a local template for interpreting extra-galactic molecular line observations. We use the wide-band receiver at the IRAM-30m to spatially…
Interstellar deuterated ammonia : from NH3 to ND3
- È. Roueff, D. Lis, F. D. Tak, M. Gerin, P. Goldsmith
- Physics
- 20 April 2005
We use spectra and maps of NH 2 D, ND 2 H, and ND 3 , obtained with the CSO, IRAM 30 m and Arecibo telescopes, to study deuteration processes in dense cores. The data include the first detection of…
Molecular absorption lines toward star-forming regions: a comparative study of HCO+, HNC, HCN, and CN
- B. Godard, E. Falgarone, M. Gerin, P. Hily-Blant, M. Luca
- Physics
- 3 June 2010
Aims. The comparative study of several molecular species at the origin of the gas phase chemistry in the diffuse interstellar medium (ISM) is a key input in unraveling the coupled chemical and…
Low sulfur depletion in the Horsehead PDR
- J. Goicoechea, J. Pety, S. Baek
- Environmental Science, Physics
- 30 May 2006
Aims.We present 3.65'' × 3.34'' angular-resolution IRAM Plateau de Bure Interferometer (PdBI) observations of the CS J = 2-1 line toward the Horsehead Photodissociation Region (PDR), complemented…
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