NOAO >   Observing Info >   Approved Programs >   1999B-0020

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Program Information for 1999B-0020


PI: Michael J Hudson, University of Victoria, mjhudson@uwaterloo.ca
Address: PO Box 3055, Victoria V8W 3P6 CANADA

CoI: John R Lucey, University of Durham
CoI: David Schade, DRAO
CoI: Russell J Smith, Pontificia Universidad Catolica de Chile
CoI: Nicholas B Suntzeff, NOAO
CoI: Gary A Wegner, Dartmouth College
CoI: Roger L Davies, University of Durham

Title: A Fundamental Plane Peculiar Velocity Survey ofRich Clusters within 200 h^-1 Mpc

Abstract: The peculiar velocity field is the only probe of the mass distribution on large scales ($gtrsim 10 hmpc$) in the nearby Universe. In particular, the bulk flow of the local volume with respect to the CMB probes the very largest scales. Some recent bulk flow results are apparently in conflict, possibly due to the systematics arising from the wide range of instrumentation used by the different groups. We propose a deep, homogeneous, all-sky spectroscopic and photometric study of 100 X-ray selected clusters within 200 hmpc. Using the Fundamental Plane distance indicator, we will make an independent determination of the large-scale flow of clusters of galaxies with respect to the CMB. With 4000 early-type galaxies (a factor of 5 increase over current FP surveys), we expect combined random and systematic errors to be $lesssim 120$ kms for each component of the bulk flow vector. This goal can only be accomplished by a survey program which guarantees access to identical instrumentation over the course of the survey. The resulting photometric and spectroscopic database will be a unique and valuable resource to the community for studies of galaxy morphology, stellar populations and galaxy evolution in the cluster environment.

Program Type: Survey

Scheduled Nights:
Run 1 (1999B):  WIYN/HYDR -- 2n on Oct 07 - Oct 10 1999
Run 1 (2000B):  WIYN/HYDR -- 4n on Oct 28 - Oct 31 2000
Run 1 (2001A):  WIYN/HYDR -- 4n on Feb 14 - Feb 16 2001, Apr 30 - May 01 2001, May 29 - May 31 2001
Run 1 (2001B):  WIYN/HYDR -- 3.5n on Oct 08 - Oct 14 2001
Run 2 (1999B):  CT-4m/HYDRA -- 1n on Sep 15 - Sep 16 1999
Run 2 (2001A):  CT-4m/HYDRA -- 3n on Feb 15 - Feb 17 2001, Jun 25 - Jun 27 2001
Run 2 (2001B):  CT-4m/HYDRA -- 5n on Oct 10 - Oct 14 2001
Run 3 (2000B):  CT-4m/MOSAIC -- 3.5n on Oct 20 2000, Oct 28 - Oct 30 2000
Run 3 (2001A):  CT-4m/MOSAIC -- 0.5n on Apr 01 2001
Run 4 (2001A):  KP-4m/MOSA -- 1n on Mar 23 2001


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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