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The ALFA Zone of Avoidance Survey: Results from the Precursor Observations

Published online by Cambridge University Press:  01 June 2007

C. M. Springob ,
P. A. Henning ,
B. Catinella ,
F. Day ,
R. Minchin ,
E. Momjian ,
B. Koribalski ,
K. L. Masters ,
E. Muller  and
C. Pantoja
...Show all authors
C. M. Springob
Affiliation:
Naval Research Laboratory
P. A. Henning
Affiliation:
U. of New Mexico
B. Catinella
Affiliation:
Arecibo Observatory, National Astronomy and Ionosphere Center
F. Day
Affiliation:
U. of New Mexico
R. Minchin
Affiliation:
Arecibo Observatory, National Astronomy and Ionosphere Center
E. Momjian
Affiliation:
Arecibo Observatory, National Astronomy and Ionosphere Center
B. Koribalski
Affiliation:
Australia Telescope National Facility
K. L. Masters
Affiliation:
Harvard-Smithsonian Center for Astrophysics
E. Muller
Affiliation:
Australia Telescope National Facility
C. Pantoja
Affiliation:
U. of Puerto Rico
M. Putman
Affiliation:
U. of Michigan
J. L. Rosenberg
Affiliation:
George Mason U.
S. Schneider
Affiliation:
U. of Massachusetts
L. Staveley-Smith
Affiliation:
U. of Western Australia
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Abstract

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The Arecibo L-band Feed Array Zone of Avoidance Survey (ALFA ZOA) will map 1350-1800 deg2 at low Galactic latitude, providing HI spectra for galaxies in regions of the sky where our knowledge of local large scale structure remains incomplete, owing to obscuration from dust and high stellar confusion near the Galactic plane. Because of these effects, a substantial fraction of the galaxies detected in the survey will have no optical or infrared counterparts. However, near infrared follow up observations of ALFA ZOA sources found in regions of lowest obscuration could reveal whether some of these sources could be objects in which little or no star formation has taken place (“dark galaxies”). We present here the results of ALFA ZOA precursor observations on two patches of sky totaling 140 deg2 (near l = 40°, and l = 192°). We have measured HI parameters for detections from these observations, and cross-correlated with the NASA/IPAC Extragalactic Database (NED). A significant fraction of the objects have never been detected at any wavelength. For those galaxies that have been previously detected, a significant fraction have no previously known redshift, and no previous HI detection.

Keywords

galaxies: distances and redshiftsgalaxies: ISMradio lines: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 383 - 384
Copyright
Copyright © International Astronomical Union 2008

References

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