Pks 1830-211: oh and hi at z = 0.89 and the first meerkat uhf spectrum

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Date

2021

Journal Title

Journal ISSN

Volume Title

Publisher

EDP Sciences

Abstract

The Large Survey Project (LSP) "MeerKAT Absorption Line Survey"(MALS) is a blind H I 21 cm and OH 18 cm absorption line survey in the L- and UHF-bands, primarily designed to better determine the occurrence of atomic and molecular gas in the circumgalactic and intergalactic medium, and its redshift evolution. Here we present the first results using the UHF band obtained towards the strongly lensed radio source PKS 1830-211, revealing the detection of absorption produced by the lensing galaxy. With merely 90 min of data acquired on-source for science verification and processed using the Automated Radio Telescope Imaging Pipeline (ARTIP), we detect in absorption the known H I 21 cm and OH 18 cm main lines at z = 0.89 at an unprecedented signal-to-noise ratio (4000 in the continuum, in each 6 km s-1 wide channel). For the first time we report the detection of OH satellite lines at z = 0.89, which until now have not been detected at z > 0.25.

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Keywords

Astronomy, Astrophysics, Meerkat, Molecular species, Gas

Citation

Combes, F. et al. (2021). Pks 1830-211: oh and hi at z = 0.89 and the first meerkat uhf spectrum. Astronomy and Astrophysics, 648, A116.10.1051/0004-6361/202040167