Results 31 to 40 of about 167,710 (319)
Origins of carbon-enhanced metal-poor stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 AbstractWe investigate the nature of carbon-enhanced metal-poor (CEMP) stars in Milky Way (MW) analogues selected from the eagle cosmological hydrodynamical simulation. The stellar evolution model in eagle includes the physics of enrichment by asymptotic giant branch (AGB) stars, winds from massive stars, and Type Ia and Type II supernovae (SNe).
Mahavir Sharma +3 more
openaire +4 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
The Astrophysical Journal, 2001 With a sample of 22 metal-poor stars, we demonstrate that the heavy element abundance pattern (Z > 55) is the same as the r-process contributions to the solar nebula. This bolsters the results of previous studies that there is a universal r-process production pattern.
Johnson, Jennifer A., Bolte, Michael
openaire +2 more sources
The Na-O anticorrelation in horizontal branch stars. IV. M22 [PDF]
, 2014 We obtained high-resolution spectra for 94 candidate stars belonging to the HB of M22 with FLAMES.
Bragaglia, A. +9 more
core +3 more sources
Sulphur Abundance in Very Metal-poor Stars [PDF]
The Astrophysical Journal, 2001 14 pages, 3 figures, accepted by ApJ ...
Israelian, Garik, Rebolo, Rafael
openaire +2 more sources
Heavy‐Element Diffusion in Metal‐poor Stars [PDF]
The Astrophysical Journal, 2001 to appear in ApJ; 11 ...
Chaboyer, Brian +4 more
openaire +2 more sources
The Astrophysical Journal, 2023 We present uniformly measured stellar metallicities of 463 stars in 13 Milky Way (MW) ultra-faint dwarf galaxies (UFDs; M _V = −7.1 to −0.8) using narrowband CaHK (F395N) imaging taken with the Hubble Space Telescope.
Sal Wanying Fu +12 more
doaj +1 more source
α-elements in mildly metal-poor stars [PDF]
Proceedings of the International Astronomical Union, 2005 Accurate relative abundances of light elements (C to Ca) have been obtained in a sample of mildly metal-poor stars (Decauwer et al . 2005). Combined with the results of a previous study (Jehin et al . 1999), we find different slopes in the correlations between the different α-elements.
Decauwer, H. +3 more
openaire +2 more sources
The Astronomy and Astrophysics ReviewAccepted for publication on The Astronomy & Astrophysics Review, typos corrected, one reference was missing from the latex source in the previous ...
Piercarlo Bonifacio +3 more
openaire +4 more sources
On the Origins of Extreme Velocity Stars as Revealed by Large-scale Galactic Surveys
The Astronomical Journal, 2023 We assemble a large sample of 12,784 high-velocity stars with total velocity V _GSR ≥ 300 km s ^−1 , selected from RAVE DR5, SDSS DR12, LAMOST DR8, APOGEE DR16, GALAH DR2, and Gaia EDR3.
Qing-Zheng Li +5 more
doaj +1 more source