Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21724622p&link_type=abstract
American Astronomical Society, AAS Meeting #217, #246.22; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
We present deep neutral hydrogen observations of the nearby spiral galaxy NGC 5055 as part of the Westerbork Hydrogen Accretion in LOcal GAlaxieS (HALOGAS) survey currently being performed with the Westerbork Synthesis Radio Telescope (WSRT). The HALOGAS survey aims to investigate cold gas accretion in a sample of 22 neutrally-selected nearby spiral galaxies with 120 hours of integrated observation time for each target. The data are sensitive enough to study faint neutral hydrogen in the galaxy outskirts and to search for halogas and possible accreting gas clouds. The galaxy NGC 5055 is a moderately-inclined SAbc galaxy in the sample with a large pronounced warp of the extended gaseous disk and a declining rotation curve outside of the optical radius. We present an analysis of the new HI observations of this galaxy based on a tilted ring analysis and on more detailed modeling and visualization of the 3-D HI distribution and kinematics. We also discuss the relation between star formation in the faint outer disk spiral arms by comparison of the HI with GALEX and other star formation tracers.
HALOGAS Team
Heald George
Józsa Gyula
Patterson Maria
Rand Richard
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