/ftp/cats/aliases/K/./KMP2008_1_



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J/ApJ/678/851           Substructure in the Halo                 (Keller+, 2008)
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	table2.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/678/851
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Beginning of ReadMe : J/ApJ/678/851 RR Lyrae survey in the Galactic Halo (Keller+, 2008) ================================================================================ Revealing substructure in the Galactic Halo: the SEKBO RR Lyrae survey. Keller S.C., Murphy S., Prior S., Dacosta G., Schmidt B. <Astrophys. J., 678, 851-864 (2008)> =2008ApJ...678..851K ================================================================================ ADC_Keywords: Photometry, VRI ; Stars, variable ; Stars, distances Keywords: Galaxy: halo - Galaxy: structure - stars: variables: other Abstract: We present a search for RR Lyrae variable stars from archival observations of the Southern Edgeworth-Kuiper Belt Object survey. The survey covers 1675deg^2^ along the ecliptic to a mean depth of V=19.5, i.e., a heliocentric distance of  50kpc for RR Lyrae stars. The survey reveals 2016 RR Lyrae candidates. Follow-up photometric monitoring of a subset of these candidates shows  24% contamination by non-RR Lyrae variables. We derive a map of overdensity of RR Lyrae stars in the halo that reveals a series of structures coincident with the leading and trailing arms of debris from the Sagittarius dwarf galaxy. One of the regions of overdensity is found on the trailing arm, 200deg from the main body of the Sagittarius dwarf at a distance of  45kpc. This distant detection of the stellar population of the outer trailing arm of Sagittarius offers a tight constraint on the motion of the dwarf galaxy. A distinctly separate region of overdensity is seen toward the Virgo overdensity. Description: The present study is based on the archived observations of the Southern Edgeworth-Kuiper Belt Object (SEKBO) survey (Moody et al. 2003EM&P...92..125M). SEKBO was a multiepoch, two-color imaging survey of a 10deg band centered on the ecliptic. Observations were obtained over the 3 years from December 1999 on the Mount Stromlo Observatory 50 inch (1.27) Great Melbourne Telescope that was previously used for the MACHO microlensing survey.