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 Millimetrique (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 Millimetrique (IRAM)

K. M. Menten

Max Planck Society

D.-V. Trung

Vietnamese Academy of Science and Technology Institute of Physics and Electronics

M. A. Zwaan

European Southern Observatory (ESO)

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 566 L6

Subject Categories

Astronomy, Astrophysics and Cosmology

Infrastructure

Onsala Space Observatory

DOI

10.1051/0004-6361/201423947

More information

Latest update

9/7/2018 1