Volume 372, Number 3, June IV 2001
|Page(s)||820 - 823|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 June 2001|
21-cm H I emission from the Damped Lyman- absorber SBS 1543+593
Princeton University Observatory, Princeton, NJ 08544, USA
2 Max-Plank-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
3 Depto. de Astronomía, Apdo. Postal 144, Guanajuato, Gto. 36000, Mexico
Corresponding author: D. V. Bowen, firstname.lastname@example.org
Accepted: 24 April 2001
We detect 21-cm emission from the Low Surface Brightness (LSB) galaxy SBS 1543+593, which gives rise to a Damped-Lyα (DLyα) absorption line in the spectrum of the background QSO HS 1543+5921 (). We obtain an accurate measure of the velocity of the H I gas in the LSB galaxy, km s-1, and derive a mass of . We compare with limits obtained towards two other DLyα systems, and show that SBS 1543+593 would not have been detected. Hence LSB galaxies similar to SBS 1543+593 can be responsible for DLyα systems at even modest redshifts without being detectable from their 21-cm emission.
Key words: galaxies: individual: SBS 1543+593 / radio lines: ISM / quasars: absorption lines
© ESO, 2001
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