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An HI survey of the Bootes Void. I. The Data | | A. Szomoru
; J.H. van Gorkom
; M.D. Gregg
; | | Date: |
28 Nov 1995 | | Abstract: | We present the results of a neutral hydrogen survey of the Bootes void carried out with the VLA in D-array. The survey covers $sim 1100$ Mpc$^{3}$, about 1\% of the volume of the void as defined by Kirshner etal 1987. We observed 24 fields, centered on known void galaxies; 16 of these were detected in HI. Eighteen uncataloged companion galaxies were discovered directly in the HI line at distances of $45sec$ to $14.5min$ from the target galaxies. We also present the results of follow-up optical imaging observations and discovery of one additional Bootes void galaxy, found through spectroscopy of a number of apparent companions to known void members. Our angular resolution is $sim 1min$ (45 kpc) footnote{Throughout this paper, we have assumed ${H_{0}}$ = ${
m 100,km,s^{-1}Mpc^{-1}}$.}, each field has a size of $sim 1deg$ (2.7 Mpc). The detected HI masses range from $8 imes 10^{8}$ to $1 imes 10^{10} msol$. Typically our $2sigma$ HI column density sensitivity is $2 imes 10^{19} {
m cm^{-2}}$. The radio and optical data are analyzed and discussed in the following companion article (Paper~2, Szomoru, van Gorkom, Gregg and Strauss 1996). | | Source: | arXiv, astro-ph/9511127 | | Services: | Forum | Review | PDF | Favorites | |
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