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• W2271981369 endingPage "52" @default.
• W2271981369 startingPage "52" @default.
• W2271981369 abstract "A blind H i survey of the extragalactic sky behind the southern Milky Way has been conducted with the multibeam receiver on the 64 m Parkes radio telescope. The survey covers the Galactic longitude range and Galactic latitudes to an rms sensitivity of 6 mJy per beam per 27 km s−1 channel and yields 883 galaxies to a recessional velocity of 12,000 km s−1. The survey covers the sky within the H i Parkes All-Sky Survey (HIPASS) area to greater sensitivity, finding lower H i mass galaxies at all distances, and probing more completely the large-scale structures at and beyond the distance of the Great Attractor. Fifty-one percent of the H i detections have an optical/near-infrared (NIR) counterpart in the literature. A further 27% have new counterparts found in existing, or newly obtained, optical/NIR images. The counterpart rate drops in regions of high foreground stellar crowding and extinction, and for low H i mass objects. Only 8% of all counterparts have a previous optical redshift measurement. The H i sources are found independently of Galactic extinction, although the detection rate drops in regions of high Galactic continuum. The survey is incomplete below a flux integral of approximately 3.1 Jy km s−1 and mean flux density of approximately 21 mJy, with 75% and 81% of galaxies being above these limits, respectively. Taking into account dependence on both flux and velocity width, and constructing a scaled dependence on the flux integral limit with velocity width (w0.74), completeness limits of 2.8 Jy km s−1 and 17 mJy are determined, with 92% of sources above these limits. A notable new galaxy is HIZOA J1353−58, a possible companion to the Circinus galaxy. Merging this catalog with the similarly conducted northern extension, large-scale structures are delineated, including those within the Puppis and Great Attractor regions and the Local Void. Several newly identified structures are revealed here for the first time. Three new galaxy concentrations (NW1, NW2, and NW3) are key in confirming the diagonal crossing of the Great Attractor Wall between the Norma Cluster and the CIZA J1324.7–5736 cluster. Further contributors to the general mass overdensity in that area are two new clusters (CW1 and CW2) in the nearer Centaurus Wall, one of which forms part of the striking 180° (Mpc) long filament that dominates the southern sky at velocities of ∼3000 km s−1, and the suggestion of a further wall at the Great Attractor distance at slightly higher longitudes." @default.
• W2271981369 created "2016-06-24" @default.
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• W2271981369 date "2016-02-09" @default.
• W2271981369 modified "2023-10-06" @default.
• W2271981369 title "THE PARKES H I ZONE OF AVOIDANCE SURVEY" @default.
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• W2271981369 doi "https://doi.org/10.3847/0004-6256/151/3/52" @default.
• W2271981369 hasPublicationYear "2016" @default.
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