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 Millimétrique (IRAM)
LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres
C. Henkel
King Abdulaziz University
Max-Planck-Gesellschaft
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, Rymd- och geovetenskap, Radioastronomi och astrofysik
A. Beelen
Université Paris-Sud
J. Darling
University of Colorado at Boulder
Cathy Horellou
Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik
S. Martin
Institut de Radioastronomie Millimétrique (IRAM)
K. M. Menten
Max-Planck-Gesellschaft
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 L6Ämneskategorier
Astronomi, astrofysik och kosmologi
Infrastruktur
Onsala rymdobservatorium
DOI
10.1051/0004-6361/201423947