Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21113222l&link_type=abstract
American Astronomical Society, AAS Meeting #211, #132.22; Bulletin of the American Astronomical Society, Vol. 39, p.965
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The Arecibo Zone of Avoidance (ZOA) Survey is a blind survey designed to map the distribution of low Galactic-latitude galaxies and large-scale structure through the detection of neutral hydrogen (HI) emission. We report here on precursor observations of a 100-square degree field around l = 190 (Taurus region), spanning from about -2600 to 18,000 km/s. These observations were relatively shallow with an effective integration time of 3 seconds per beam and an RMS of 10.5 mJy at a velocity resolution of 5 km/s. Forty-eight galaxies were detected in the data cube. Eighteen of these had not previously been cataloged and, of these, 12 were not visible on the 2MASS sky atlas. J-band magnitudes for 24 of the galaxies were found from the 2MASS catalog and were measured directly from the 2MASS images for a further seven. We used these J-band magnitudes to derive stellar luminosities. We find that the HI masses correlate strongly with stellar luminosity, although there are three outliers with MHI/LJ > 2 MO/LO which may be LSB galaxies. The galaxy redshift distribution also reveals gaps at 40 and 60 Mpc; further analysis will address the significance of these gaps in the context of large-scale structure. The Arecibo Observatory is part of the National Astronomy and Ionosphere Center, which is operated by Cornell University under a cooperative agreement with the National Science Foundation. R. Lamm is grateful for the NSF REU support at the Arecibo Observatory.
ALFA ZOA Collaboration
Catinella Barbara
Henning Patricia
Lamm Rouwenna
Lowenthal James
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