21-cm H I emission from the Damped Lyman-alpha absorber SBS 1543+593

Abstract

We detect 21-cm emission from the Low Surface Brightness (LSB) galaxy SBS 1543+593, which gives rise to a Damped Lyman-alpha (DLA) absorption line in the spectrum of the background QSO HS 1543+5921 (z=0.807). We obtain an accurate measure of the velocity of the H I gas in the LSB galaxy, v=2868 km/s, and derive a mass of 1.3e9 solar masses. We compare this value with limits obtained towards two other z~0.1 DLA systems, and show that SBS 1543+593 would not have been detected. Hence LSB galaxies similar to SBS 1543+593 can be responsible for DLA systems at even modest redshifts without being detectable from their 21-cm emission.

4 pages, 1 figure, accepted for publication in A&A

References in corpus (2)

• ATCA search for 21 cm emission from a candidate damped Ly-$\alpha$ absorber at z = 0.101
• Lost and Found: The Damped Lyman Alpha Absorbers in the QSO OI 363

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• A Comparison of Absorption and Emission Line Abundances in the Nearby Damped Lyman-alpha Galaxy SBS 1543+593
• The Contribution of HI-rich Galaxies to the Damped Lyman-alpha Absorber Population at z=0
• ALMA + VLT observations of a Damped Lyman-α absorbing galaxy: Massive, wide CO emission, gas-rich but with very low SFR
• Emission-line spectroscopy of Damped Lyman Alpha Systems: The case of SBS 1543+593/HS 1543+5921
• The HII Regions of the Damped Lyman alpha Absorber SBS 1543+593
• HI 21cm imaging of a nearby Damped Lyman-alpha system
• The Nearby Damped Lyman-alpha Absorber SBS 1543+593: A Large HI Envelope in a Gas-Rich Galaxy Group
• The gas and stellar mass of low-redshift damped Lyman-$\alpha$ absorbers
• The strange case of a sub-DLA with very little HI
• HI 21cm emission from the sub-damped Lyman-alpha absorber at z=0.0063 towards PG1216+069
• Discovery of a damped Ly$\alpha$ absorber originating in a spectacular interacting dwarf galaxy pair at $z=0.026$
• Constraints on the gas masses of low-z damped Lyman-$\alpha$ systems
• HI Observations of the Ca II absorbing galaxies Mrk 1456 and SDSS J211701.26-002633.7