Mathematics – Logic
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.3808t&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #38.08; Bulletin of the American Astronomical Society, Vol. 32, p.1454
Mathematics
Logic
1
Scientific paper
We have completed a high-resolution VLA/WSRT survey of HI in M33. Our data comprise the most detailed HI observations ever obtained for a spiral galaxy other than the Milky Way and reveal many striking properties of the neutral atomic gas. Spatial resolution of 20 pc (assuming a distance of 840 kpc) permits identification of expanding bubbles smaller than those cataloged by Deul & den Hartog, in addition to HI counterparts of discrete dust clouds. Likewise, we find a complex morphological relationship between HI and HII components. Velocity sampling of 1.3 km/s was achieved, thereby permitting the study of line profile variations as a function of environment within M33. A possible dark companion to M33 has been discovered using our WSRT observations. Deep 100m-class, single dish observations or D-configuration VLA images are needed to follow-up this lead, and exclude the possibility of a Galactic HVC explanation. This poster summarizes our initial analysis of the new dataset.
Braun Robert
Thilker David A.
Walterbos Reinirus Antonius Maria
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