The Neutral Hydrogen Content of Haro 11
Abstract
We present the results of deep HI spectral line observations of the nearby dwarf galaxy Haro 11 (ESO 350-IG038), obtained using the Karl G. Jansky Very Large Array (VLA). Haro 11 is one of a small number of nearby dwarf galaxies that are known to be both Lyman alpha and Lyman continuum emitters. While it harbors strong ongoing star formation, the neutral hydrogen gas in the system has been notoriously difficult to detect. Previous interferometric observations have resulted in non-detections, while a deep GBT spectrum reveals a weak spectral line. Using 24 hours of observing time from program VLA/17B-287, we perform a vigorous search for HI in emission. We confirm the previous detection of HI in absorption, including the velocity offset compared to the optical emission lines. Haro 11 is a highly enigmatic galaxy whose neutral hydrogen content is much less than would be expected given its aggressive star formation rate.
- Publication:
-
American Astronomical Society Meeting Abstracts #233
- Pub Date:
- January 2019
- Bibcode:
- 2019AAS...23336810T