Halo streams in the SDSS-DR7 : J/ApJ/698/865

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Authors : Klement R. orcid , Rix H.-W., Flynn C. (hide) , Rix H.-W., Flynn C. et..al

VizieR DOI : 10.26093/cds/vizier.16980865
Bibcode : 2009ApJ...698..865K (ADS) (Simbad) (Objects)
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CDS Keywords : Abundances, [Fe/H]; Photometry, SDSS; Stars, halo; Radial velocities; Stars, distances
UAT : Metallicity, Optical astronomy, Sloan photometry, Halo stars, Radial velocity, Stellar distance

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Inserted into VizieR : 19-Jul-2011
Last modification : 29-Aug-2017

Halo streams in the seventh Sloan Digital Sky Survey data release. (2009)

Keywords : Galaxy kinematics and dynamics - solar neighborhood

Abstract:We have detected stellar halo streams in the solar neighborhood using data from the seventh public data release of the Sloan Digital Sky Survey (SDSS), which includes the directed stellar program Sloan Extension For Galactic Understanding and Exploration (SEGUE). In order to derive distances to each star, we used the metallicity-dependent photometric parallax relation from Ivezic et al. (2008ApJ...684..287I). Our final sample consists of 22321 nearby (d<=2kpc), metal-poor ([Fe/H]<=-0.5) main-sequence stars with six-dimensional estimates of position and space velocity (r{vec},{nu}{vec}). We characterize the orbits of these stars through suitable kinematic proxies for their "effective" integrals of motion, angular momentum, eccentricity, and ...(more)
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American Astronomical Society policies
SDSS-I was an imaging and spectroscopic survey that began routine operations in 2000 April and continued through 2005 June. The SDSS, and its extensions, uses a dedicated 2.5m telescope located at the Apache Point Observatory in New Mexico. One of three subsurveys carried out during the first extension of the SDSS, known as SDSS-II, the Sloan Extension for Galactic Understanding and Exploration (SEGUE), ran from 2005 July to 2008 June. SEGUE obtained some 250000 medium-resolution spectra of stars in the Galaxy.

  • II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
  • J/AJ/136/2070 : SEGUE stellar parameter pipeline. III. (Allende Prieto+, 2008)
  • J/AJ/134/1579 : Halo stars in solar neighborhood (Kepley+, 2007)
  • http://www.sdss.org/ : Sloan Digital Sky Survey (SDSS) home page

                


                

                    

                


                

                    

                


                

                    
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