Detection of chloronium and measurement of the Cl-35/Cl-37 isotopic ratio at z=0.89 toward PKS 1830-211
Artikel i vetenskaplig tidskrift, 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.

Författare

Sebastien Muller

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

John H Black

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

M. Guelin

Institut de RadioAstronomie Millimetrique (IRAM)

LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres

C. Henkel

Max Planck-institutet

King Abdulaziz University

F. Combes

CNRS Centre National de la Recherche Scientifique

M. Gerin

LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres

Susanne Aalto

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

A. Beelen

Universite Paris-Sud XI

J. Darling

University of Colorado at Boulder

Cathy Horellou

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

S. Martin

Institut de RadioAstronomie Millimetrique (IRAM)

K. M. Menten

Max Planck-institutet

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

Ämneskategorier

Astronomi, astrofysik och kosmologi

Infrastruktur

Onsala rymdobservatorium

DOI

10.1051/0004-6361/201423947