97 datasets found

Keywords: halo stars

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  • Candidate halo wide binaries

    We present an improved catalog of halo wide binaries compiled from an extensive literature search. Most of our binaries stem from the common proper motion binary catalogs by...
  • Orphan stream high-resolution spectroscopic study

    We present the first high-resolution spectroscopic study on the Orphan stream for five stream candidates, observed with the Magellan Inamori Kyocera Echelle spectrograph on the...
  • The SEGUE K giant survey. II. Distances of 6036 stars

    We present an online catalog of distance determinations for 6036 K giants, most of which are members of the Milky Way's stellar halo. Their medium-resolution spectra from the...
  • Metal-poor stars from HES survey. II. Spectroscopy

    We report on the discovery of seven low-metallicity stars selected from the Hamburg/ESO Survey, six of which are extremely metal-poor (EMP, [Fe/H]{<=}-3.0), with four having...
  • Region I of La Silla QUEST RR Lyrae star survey

    A search for RR Lyrae stars (RRLSs) in ~840deg^2^ of the sky in right ascension 150{deg}-210{deg} and declination -10{deg} to + 10{deg} yielded 1013 type ab and 359 type c RRLS....
  • Detailed abundances for 97 metal-poor stars. II.

    We present chemical abundance analyses of sodium, iron-peak, and neutron-capture elements for 97 kinematically selected thick disk, inner halo, and outer halo stars with...
  • Most metal-poor stars. III. 86 [Fe/H]<=-3.0 stars

    We examine the metallicity distribution function (MDF) and fraction of carbon-enhanced metal-poor (CEMP) stars in a sample that includes 86 stars with [Fe/H]<=-3.0, based on...
  • Most metal-poor stars. II. 190 Galactic halo stars

    We present a homogeneous chemical abundance analysis of 16 elements in 190 metal-poor Galactic halo stars (38 program and 152 literature objects). The sample includes 171 stars...
  • Oxygen abundances of dwarf stars

    Oxygen abundances of 67 dwarf stars in the metallicity range -1.6<[Fe/H]<-0.4 are derived from a non-LTE analysis of the 777nm OI triplet lines. These stars have precise...
  • V-band photometric follow-up of RR Lyrae from SEKBO

    We investigate the steepening of the power-law slope beyond the Galactocentric radius of R~45kpc in the RR Lyrae (RRL) space density distribution found by Keller et al. (2008,...
  • Detailed abundances for 97 metal-poor stars

    we present the abundance analysis of 97 nearby metal-poor (-3.3<[Fe/H]<-0.5) stars having kinematic characteristics of the Milky Way (MW) thick disk and inner and outer...
  • MMT hypervelocity star survey. II.

    We present the discovery of five new unbound hypervelocity stars (HVSs) in the outer Milky Way halo. Using a conservative estimate of Galactic escape velocity, our targeted...
  • r-process peaks elements in HD 160617

    We report the first detection of elements at all three r-process peaks in the metal-poor halo star HD 160617. These elements include arsenic and selenium, which have not been...
  • MW halo. III. Statistical chemical abundances

    We find that the relative contribution of satellite galaxies accreted at high redshift to the stellar population of the Milky Way's smooth halo increases with distance, becoming...
  • CASH project II. 14 extremely metal-poor stars

    We present a comprehensive abundance analysis of 20 elements for 16 new low-metallicity stars from the Chemical Abundances of Stars in the Halo (CASH) project. The abundances...
  • SDSS-DR8 BHB stars in the Milky Way's halo

    We present and analyze the positions, distances, and radial velocities for over 4000 blue horizontal-branch (BHB) stars in the Milky Way's halo, drawn from SDSS DR8. We search...
  • Galactic halo as seen by the CFHTLS

    We use Canada-France-Hawaii Telescope Legacy Survey data for 170deg^2^, recalibrated and transformed to the Sloan Digital Sky Survey ugri photometric system, to study the...
  • Detailed abundances in a halo stellar stream

    We present the results of a detailed abundance analysis of one of the confirmed building blocks of the Milky Way stellar halo, a kinematically coherent metal-poor stellar...
  • Light curve templates of RR Lyrae stars

    We present an improved analysis of halo substructure traced by RR Lyrae stars in the Sloan Digital Sky Survey (SDSS) stripe 82 region. With the addition of SDSS-II data, a...
  • Chemical compositions of 26 outer halo stars

    Chemical abundances of 26 metal-poor dwarfs and giants are determined from high-resolution and high signal-to-noise ratio spectra obtained with the Subaru/High Dispersion...
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