High-resolution Optical Spectroscopy of Stars in the Sylgr Stellar Stream

High-resolution Optical Spectroscopy of Stars in the Sylgr Stellar Stream

We observe two metal-poor main-sequence stars that are members of the recently discovered Sylgr stellar stream. We present radial velocities, stellar parameters, and abundances for 13 elements derived from high-resolution optical spectra collected using the Magellan Inamori Kyocera Echelle spectrogr...

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Veröffentlicht in:The Astrophysical journal 2019-09, Vol.883 (1), p.84
Hauptverfasser: Roederer, Ian U., Gnedin, Oleg Y.
Format: Artikel
Sprache:eng
Schlagworte:
Abundance
Astrophysics
Barium
Chemical composition
Dwarf galaxies
Globular clusters
High resolution
Iron
Main sequence stars
Metallicity
Metals
Nuclear capture
Organic chemistry
Spectroscopy
Spectrum analysis
Spheroidal galaxies
Star clusters
Stars & galaxies
Strontium
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Beschreibung
Zusammenfassung:We observe two metal-poor main-sequence stars that are members of the recently discovered Sylgr stellar stream. We present radial velocities, stellar parameters, and abundances for 13 elements derived from high-resolution optical spectra collected using the Magellan Inamori Kyocera Echelle spectrograph. The two stars have identical compositions (within 0.13 dex or 1.2 σ ) among all elements detected. Both stars are very metal-poor ([Fe/H] = −2.92 ± 0.06). Neither star is highly enhanced in C ([C/Fe] 
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ab365c