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Detection of chloronium and measurement of the35Cl/37Cl isotopic ratio atz= 0.89 toward PKS 1830–211
2014
Astronomy and Astrophysics
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We report the first extragalactic detection of chloronium (H2Cl+), in the z=0.89 absorber in front of the lensed blazar PKS1830-211. 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 ~7) in the NE line of sight, which has a lower H2/H fraction, indicating that H2Cl+ preferably traces the diffuse gas component. From the ratio of the
doi:10.1051/0004-6361/201423947
fatcat:bqdj2l2vm5hdfamkge5zxkn254