Abstract
We present the first results of a blind H I survey for galaxies in the southern zone of avoidance with a multibeam receiver on the Parkes telescope. This survey is expected to eventually catalog several thousand galaxies within Galactic latitude |b| < 5°, mostly unrecognized before because of Galactic extinction and confusion. We present here the results of the first three detections to have been imaged with the Australia Telescope Compact Array. All the galaxies lie near Galactic longitude 325° and were selected because of their large angular sizes, up to 13. Linear sizes range from 53 to 108 kpc. The first galaxy is a massive 5.7 × 1011 M⊙ disk galaxy with a faint optical counterpart, SGC 1511.1-5249. The second is probably an interacting group of galaxies straddling the Galactic equator. No optical identification is possible. The third object appears to be an interacting pair of low column density galaxies, possibly belonging to an extended Circinus or Centaurus A galaxy group. No optical counterpart has been seen despite the predicted extinction (AB = 2.7–4.4 mag) not being excessive. We discuss the implications of the results, in particular, the low H I column densities (~1019 atoms cm-2) found for two of the three galaxies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
