Results 41 to 50 of about 158,293 (319)
The Astrophysical Journal, 2023 Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for ∼1700 r -process-enhanced (RPE; [Eu/Fe] > +0.3) metal-poor stars ([Fe/H] ≤ −0.8) compiled from the R -Process Alliance, the GALactic Archaeology with ...
Derek Shank +10 more
doaj +1 more source
KMOS view of the Galactic Centre - II. Metallicity distribution of late-type stars [PDF]
, 2016 Knowing the metallicity distribution of stars in the Galactic Centre has important implications for the formation history of the Milky Way nuclear star cluster.
de Zeeuw, P. T. +7 more
core +3 more sources
Could the Ultra Metal-poor Stars be Chemically Peculiar and Not Related to the First Stars? [PDF]
, 2008 Chemically peculiar stars define a class of stars that show unusual elemental abundances due to stellar photospheric effects and not due to natal variations.
Asplund M. +12 more
core +2 more sources
A New Type of Extremely Metal-poor Star [PDF]
The Astrophysical Journal, 2007 We present an abundance analysis for the extremely metal poor star HE1424-0241 based on high dispersion spectra from HIRES at Keck. This star is a giant on the lower red giant branch with [Fe/H] ~ -4.0 dex. Relative to Fe, HE1424-0241 has normal Mg, but it shows a very large deficiency of Si, with epsilon(Si)/epsilon(Fe) ~ 1/10 and epsilon(Si)/epsilon ...
Dieter Reimers +8 more
openaire +4 more sources
Abundances of Extremely Metal-poor Star Candidates [PDF]
The Astronomical Journal, 2004 We present chemical abundances for 110 stars identified in objective-prism surveys as candidates to be very metal-poor. The abundances are derived from high S/N, intermediate-resolution spectra obtained with the Keck Observatory Echelle Spectrometer and Imager.
David K. Lai +4 more
openaire +5 more sources
Rotation and Macroturbulence in Metal-poor Field Red Giant and Red Horizontal Branch Stars [PDF]
, 2007 We report the results for rotational velocities, Vrot sin i, and macroturbulence dispersion, zeta(RT), for 12 metal-poor field red giant branch stars and 7 metal-poor field red horizontal branch stars.
Bruce W. Carney +12 more
core +3 more sources
Abundances In Very Metal‐Poor Dwarf Stars [PDF]
The Astrophysical Journal, 2004 Accepted for publication in the ...
Cohen, Judith G. +9 more
openaire +6 more sources
Discovery of the Magellanic Stellar Stream Out to 100 kpc
The Astrophysical Journal, 2023 The Magellanic Stream (MS)—an enormous ribbon of gas spanning 140° of the southern sky trailing the Magellanic Clouds—has been exquisitely mapped in the five decades since its discovery.
Vedant Chandra +9 more
doaj +1 more source
Binarity in carbon-enhanced metal-poor stars★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 13 pages, 7 figures, accepted for publication in ...
Starkenburg, Else +3 more
openaire +4 more sources
The Astrophysical Journal, 2023 We present precise photometric estimates of stellar parameters, including effective temperature, metallicity, luminosity classification, distance, and stellar age, for nearly 26 million stars using the methodology developed in the first paper of this ...
Yang Huang +20 more
doaj +1 more source