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An Obscured Galaxy Redshift Survey with FLAIR

Published online by Cambridge University Press:  05 March 2013

K. Wakamatsu
Affiliation:
Gifu University, Gifu 501–11, Japan.
M. Malkan
Affiliation:
UCLA, Los Angeles, CA 90024, USA.
Q. A. Parker
Affiliation:
AAO, Coonabarabran, NSW, Australia.
H. Karoji
Affiliation:
NOA, Mitaka 181, Tokyo, Japan.
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A problem for studies of large scale structures in nearby space (cz < 10,000 km s-1) is the presence of the Zone of Avoidance which is so large and wide on the sky that potentially important clusters and voids remain undetected. A prime example was the Ophiuchus cluster discovered by Wakamatsu and Malkan (1981) as a heavily obscured cD cluster close to the Galactic centre region (l = 0·5°, b = +9·5°). It is the second brightest X-ray cluster after Perseus. A hidden galaxy survey was performed by visually searching ESO/SERC Sky Survey (R and J) copy films of the region centred at l = 355°, b = +10° finding more than 4000 galaxies in six fields. Several irregular clusters adjacent to Ophiuchus were found forming a supercluster which may be connected to the Hercules supercluster by a wall structure parallel to the local supergalactic plane (Wakamatsu et al. 1994). In front of this supercluster, an 'Ophiuchus Void' is suggested (cz = 4,500 km s-1). The Ophiuchus supercluster at cz = 8,500 km s-1 is similar to the Hercules supercluster (cz = 11,000 km s-1), and extends north toward the latter supercluster.

Type
Hi in the Local Universe
Copyright
Copyright © Astronomical Society of Australia 1997

References

Parker, Q. A. 1996, Spectrum 10, 20 Google ScholarPubMed
Wakamatsu, K., et al. 1994, ASP Conference Series No. 67 (San Francisco: ASP), 131 Google Scholar
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