The Detection of Low Eu Abundances in Extremely Metal-poor Stars and the Origin of r -Process Elements

2003/06/30 by Yuhri Ishimaru, Shinya Wanajo, Wako Aoki +1 · 6 citations
Physics and Astronomy · #Abundance (ecology) #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Galactic halo #Galaxy #Gamma-ray bursts and supernovae #Halo #Low Mass #Nucleosynthesis #Physics #Spectral line #Spectrograph #Stars #Stellar, planetary, and galactic studies #Supernova #astro-ph #r-process

paper · pdf · doi:10.1086/381496

published as Astrophys.J.600:L47-L50,2003 · 7 pages, 2 figures, accepted for publication in the Astrophysical Journal Letters

arxiv created 2003/11/06 · openalex publication_date 2003/12/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

We report abundance analyses of three extremely metal-poor stars with [Fe/H] ≲ -3 using the Subaru High Dispersion Spectrograph. All are found to have subsolar values of [Eu/Fe]. Comparison with our chemical evolution model of the Galactic halo implies the dominant source of Eu to be the low-mass end of the supernova mass range. Future studies of stars with low Eu abundances will be important to determine the r -process site.

Citations

• [CLC][ITAL]r[/ITAL][/CLC]-Process in Neutron Star Mergers
• The Nucleosynthetic Signature of Population III
• Neutron Capture in Low‐Mass Asymptotic Giant Branch Stars: Cross Sections and Abundance Signatures
• Ther‐Process in Neutrino‐driven Winds from Nascent, “Compact” Neutron Stars of Core‐Collapse Supernovae

Cited by

• EXTREME ENHANCEMENTS OF r -PROCESS ELEMENTS IN THE COOL METAL-POOR MAIN-SEQUENCE STAR SDSS J2357–0052
• ENRICHMENT OFr-PROCESS ELEMENTS IN DWARF SPHEROIDAL GALAXIES IN CHEMO-DYNAMICAL EVOLUTION MODEL
• Explosive nucleosynthesis in core-collapse supernovae
• A holistic abundance analysis of r-rich stars
• Neutron‐Capture Elements in the Very Metal Poor Star HD 122563
• An inhomogeneous model for the Galactic halo: a possible explanation for the spread observed ins- andr-process elements