SIMBAD references

2016ApJ...824L..19R - Astrophys. J., 824, L19-L19 (2016/June-3)

Detection of phosphorus, sulphur, and zinc in the carbon-enhanced metal-poor star BD+44 493.


Abstract (from CDS):

The carbon-enhanced metal-poor star BD+44°493 ([Fe/H]=-3.9) has been proposed as a candidate second-generation star enriched by metals from a single Pop III star. We report the first detections of P and S and the second detection of Zn in any extremely metal-poor carbon-enhanced star, using new spectra of BD+44°493 collected by the Cosmic Origins Spectrograph on the Hubble Space Telescope. We derive [P/Fe]=-0.34±0.21, [S/Fe]=+0.07±0.41, and [Zn/Fe]=-0.10±0.24. We increase by 10-fold the number of Si i lines detected in BD+44°493, yielding [Si/Fe]=+0.15±0.22. The [S/Fe] and [Zn/Fe] ratios exclude the hypothesis that the abundance pattern in BD+44°493 results from depletion of refractory elements onto dust grains. Comparison with zero-metallicity supernova (SN) models suggests that the stellar progenitor that enriched BD+44°493 was massive and ejected much less than 0.07 M of 56Ni, characteristic of a faint SN.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): nuclear reactions, nucleosynthesis, abundances - stars: abundances - stars: individual: BD+44 493

VizieR on-line data: <Available at CDS (J/ApJ/824/L19): table2.dat>

Simbad objects: 2

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2016ApJ...824L..19R and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact