/ftp/cats/aliases/V/./VIMOS



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J/A+A/513/A62 Sgr dSph VIMOS photometry and radial velocities (Giuffrida+, 2010)
The following files can be converted to FITS (extension .fit or fit.gz)
	catalog.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/513/A62
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drwxr-xr-x 19 cats archive 317 Jan 29 2012 [Up] drwxr-xr-x 2 cats archive 321 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 469 Dec 19 2022 .message -r--r--r-- 1 cats archive 5141 Jul 14 2010 ReadMe -rw-r--r-- 1 cats archive 1010 Jul 14 2010 +footg5.gif -rw-r--r-- 1 cats archive 2998 Jul 14 2010 +footg8.gif -r--r--r-- 1 cats archive 14389364 May 4 2010 catalog.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : J/A+A/513/A62 Sgr dSph VIMOS photometry and radial velocities (Giuffrida+, 2010) ================================================================================ A wide angle view of the Sagittarius dwarf spheroidal galaxy. I. VIMOS photometry and radial velocities across Sgr dSph major and minor axis. Giuffrida G., Sbordone L., Zaggia S., Marconi G., Bonifacio P., Izzo C., Szeifert T., Buonanno R. <Astron. Astrophys. 513, A62 (2010)> =2010A&A...513A..62G ================================================================================ ADC_Keywords: Galaxies, nearby ; Galaxies, photometry ; Radial velocities Keywords: Local Group - galaxies: photometry - galaxies: stellar content - globular clusters: individual: M 54 - galaxies: individual: Sgr dSph Abstract: The Sagittarius dwarf Spheroidal Galaxy (Sgr dSph) provides us with a unique possibility of studying a dwarf galaxy merging event while still in progress. Moving along a short-period, quasi-polar orbit in the Milky Way Halo, Sgr dSph is being tidally dispersed along a huge stellar stream. Due to its low distance (25kpc), the main body of Sgr dSph covers a vast area in the sky (roughly 15x7degrees). Available photometric and spectroscopic studies have concentrated either on the central part of the galaxy or on the stellar stream, but the overwhelming majority of the galaxy body has never been probed. The aim of the present study is twofold. On the one hand, to produce color magnitude diagrams across the extension of Sgr dSph to study its stellar populations, searching for age and/or composition gradients (or lack thereof). On the other hand, to derive spectroscopic low-resolution radial velocities for a subsample of stars to determine membership to Sgr dSph for the purpose of high resolution spectroscopic follow-up. Description: We used VIMOS@VLT to produce V and I photometry on 7 fields across the Sgr dSph minor and major axis, plus 3 more centered on the associated globular clusters Terzan 7, Terzan 8 and Arp 2. A last field has been centered on M 54, lying in the center of Sgr dSph. VIMOS high resolution spectroscopic mode has then been used to derive radial velocities for a subsample of the observed stars, concentrating on objects having colors and magnitudes compatible with the Sgr dSph red giant branch.