SIMBAD references

2016ApJ...819..103A - Astrophys. J., 819, 103 (2016/March-2)

The chemical compositions of very metal-poor stars HD 122563 and HD 140283: a view from the infrared.

AFSAR M., SNEDEN C., FREBEL A., KIM H., MACE G.N., KAPLAN K.F., LEE H.-I., OH H., OH J.S., PAK S., PARK C., PAVEL M.D., YUK I.-S. and JAFFE D.T.

Abstract (from CDS):

From high resolution (R ~= 45,000), high signal-to-noise ratio (S/N > 400) spectra gathered with the Immersion Grating Infrared Spectrograph (IGRINS) in the H and K photometric bands, we have derived elemental abundances of two bright, well-known metal-poor halo stars: the red giant HD 122563 and the subgiant HD 140283. Since these stars have metallicities approaching [Fe/H] = -3, their absorption features are generally very weak. Neutral-species lines of Mg, Si, S and Ca are detectable, as well as those of the light odd-Z elements Na and Al. The derived IR-based abundances agree with those obtained from optical-wavelength spectra. For Mg and Si the abundances from the infrared transitions are improvements to those derived from shorter wavelength data. Many useful OH and CO lines can be detected in the IGRINS HD 122563 spectrum, from which derived O and C abundances are consistent to those obtained from the traditional [O i] and CH features. IGRINS high resolutions H- and K-band spectroscopy offers promising ways to determine more reliable abundances for additional metal-poor stars whose optical features are either not detectable, or too weak, or are based on lines with analytical difficulties.

Abstract Copyright:

Journal keyword(s): instrumentation: spectrographs - stars: abundances - stars: atmospheres - stars: individual: (HD 122563, HD 140283) - stars: Population II

VizieR on-line data: <Available at CDS (J/ApJ/819/103): table1.dat table2.dat table3.dat>

Status at CDS:  

Simbad objects: 7

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2016ApJ...819..103A and select 'bookmark this link' or equivalent in the popup menu


2020.04.01-07:18:53

© Université de Strasbourg/CNRS

    • Contact