Outlining the Local Void with the Parkes HI ZOA and Galactic Bulge Surveys
Renee C. Kraan-Korteweg (1), Nebiha Shafi (1), Baerbel Koribalski (2),, Lister Staveley-Smith (3), Peter Buckland (3), Patricia A. Henning (4),, Anthony P. Fairall (1) ((1) Univ. of Cape Town, (2) ATNF CSIRO, (3) Univ.of, Western Australia, (4) Univ. of New Mexico)
TL;DR
This paper uses combined HI surveys from the Parkes telescope to map the Local Void's extent and content in the Galactic Bulge region, revealing galaxies in a previously obscured area.
Contribution
It provides new 3D mapping of the Local Void using HI surveys in a region of high extinction and star crowding, extending previous knowledge.
Findings
Extended the HI survey coverage towards higher latitudes.
Identified galaxies within the Local Void region.
Mapped the 3D distribution of galaxies in the Galactic Bulge area.
Abstract
The Parkes deep HI ZOA survey has been extended between 2002 and 2004 towards higher latitudes in the Galactic Bulge region. This area of extreme star crowding and high extinction levels remains impenetrable at any other waveband regime. Preliminary results of the 3 dimensional distribution based on the combined HI-surveys are presented. We focus on the extent and "content" of the Local Void as outlined by these HI surveys, followed by a preliminary discussion of the properties of the few galaxies detected in the Local Void.
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