Detection of chloronium and measurement of the Cl-35/Cl-37 isotopic ratio at z=0.89 toward PKS 1830-211
Journal article, 2014
We report the first extragalactic detection of chloronium (H2Cl+) in the z = 0.89 absorber in front of the lensed blazar PKS 1830-211. The ion is detected through its 1(11)-0(00) line along two independent lines of sight toward the North-East and South-West images of the blazar. The relative abundance of H2Cl+ is significantly higher (by a factor similar to 7) in the NE line of sight, which has a lower H-2/H fraction, indicating that H2Cl+ preferably traces the diffuse gas component. From the ratio of the (H2Cl+)-Cl-35 and (H2Cl+)-Cl-37 absorptions toward the SW image, we measure a Cl-35/Cl-37 isotopic ratio of 3.1(-0.2)(+0.3) at z = 0.89, similar to that observed in the Galaxy and the solar system.
Author
Sebastien Muller
Chalmers, Earth and Space Sciences, Onsala Space Observatory
John H Black
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
M. Guelin
Institut de Radioastronomie Millimétrique (IRAM)
LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres
C. Henkel
King Abdulaziz University
Max Planck Society
F. Combes
Centre national de la recherche scientifique (CNRS)
M. Gerin
LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres
Susanne Aalto
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
A. Beelen
University of Paris-Sud
J. Darling
University of Colorado at Boulder
Cathy Horellou
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
S. Martin
Institut de Radioastronomie Millimétrique (IRAM)
K. M. Menten
Max Planck Society
D.-V. Trung
Vietnam Academy of Science and Technology
M. A. Zwaan
European Southern Observatory (ESO)
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 566 L6Subject Categories
Astronomy, Astrophysics and Cosmology
Infrastructure
Onsala Space Observatory
DOI
10.1051/0004-6361/201423947