NIR Tully-Fisher in the Zone of Avoidance - III. Deep NIR catalogue of the HIZOA galaxies

Khaled Said, Reńee C. Kraan-Korteweg, T. H. Jarrett, Lister Staveley-Smith, Wendy L. Williams

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9 Citations (Scopus)


We present a deep near-infrared (NIR; J, H, and Ks bands) photometric catalogue of sourcesfrom the Parkes HI Zone of Avoidance (HIZOA) survey, which forms the basis for an investigationof the matter distribution in the Zone of Avoidance. Observations were conductedbetween 2006 and 2013 using the Infrared Survey Facility (IRSF), a 1.4-m telescope situatedat the South African Astronomical Observatory site in Sutherland. The images cover all 1108HIZOA detections and yield 915 galaxies. An additional 105 bright 2MASS galaxies in thesouthern ZOA were imaged with the IRSF, resulting in 129 galaxies. The average Ks-bandseeing and sky background for the survey are 1.38 arcsec and 20.1 mag, respectively. Thedetection rate as a function of stellar density and dust extinction is found to depend mainly onthe HI mass of the HI detected galaxies, which in principal correlates with the NIR brightnessof the spiral galaxies. The measured isophotal magnitudes are of sufficient accuracy (errors ∼0.02 mag) to be used in a Tully-Fisher analysis. In the final NIR catalogue, 285 galaxieshave both IRSF and 2MASS photometry (180 HIZOA plus 105 bright 2MASX galaxies).The Ks-band isophotal magnitudes presented in this paper agree, within the uncertainties, with those reported in the 2MASX catalogue. Another 30 galaxies, from the HIZOA northernextension, are also covered by UKIDSS Galactic Plane Survey (GPS) images, which are onemagnitude deeper than our IRSF images. A modified version of our photometry pipeline wasused to derive the photometric parameters of these UKIDSS galaxies. Good agreement wasfound between the respective Ks-band isophotal magnitudes. These comparisons confirm therobustness of the isophotal parameters and demonstrate that the IRSF images do not sufferfrom foreground contamination, after star removal, nor underestimate the isophotal fluxes ofZoA galaxies.

Original languageEnglish
Article numberstw1887
Pages (from-to)3386-3400
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Issue number3
Early online date30 Jul 2016
Publication statusPublished - 1 Nov 2016


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