Detection of Phosphorus, Sulphur, and Zinc in the Carbon-Enhanced Metal-Poor Star BD+44 493

Abstract

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 ten-fold the number of Si I lines detected in BD+44 493, yielding [Si/Fe]=+0.15 +/- 0.22. The solar [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 models suggests that the stellar progenitor that enriched BD+44 493 was massive and ejected much less than 0.07 Msun of Ni-56, characteristic of a faint supernova.

Accepted for publication in the Astrophysical Journal Letters (4 pages, 2 figures)

References in corpus (15)

• A Search for Stars of Very Low Metal Abundance. VI. Detailed Abundances of 313 Metal-Poor Stars
• Carbon-Enhanced Metal-Poor Star Frequencies in the Galaxy: Corrections for the Effect of Evolutionary Status on Carbon Abundances
• $s$-process production in rotating massive stars at solar and low metallicities
• Sulphur and zinc abundances in Galactic halo stars revisited
• Detection of Elements at All Three r-process Peaks in the Metal-Poor Star HD 160617
• The role of binaries in the enrichment of the early Galactic halo. II. Carbon-Enhanced Metal-Poor Stars - CEMP-no stars
• Iron-Group Abundances in the Metal-Poor Main Sequence Turnoff Star HD~84937
• Metal-Poor Stars Observed with the Magellan Telescope. III. New Extremely and Ultra Metal-Poor Stars from SDSS/SEGUE and Insights on the Formation of Ultra Metal-Poor Stars
• The first stars: CEMP--no stars and signatures of spinstars
• Faint Population III supernovae as the origin of the most iron-poor stars
• Hubble Space Telescope Near-Ultraviolet Spectroscopy of the Bright CEMP-no Star BD+44 493
• Detection of Neutral Phosphorus in the Near Ultraviolet Spectra of Late-Type Stars
• Could the Ultra Metal-poor Stars be Chemically Peculiar and Not Related to the First Stars?
• Searching for Dust around Hyper Metal-Poor Stars
• Molecular line formation in the extremely metal-poor star BD+44 493

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• Evidence for an aspherical Population III supernova explosion inferred from the hyper metal-poor star HE1327-2326
• Observational Constraints on First-Star Nucleosynthesis. II. Spectroscopy of an Ultra Metal-Poor CEMP-no Star
• The Gaia-ESO Survey: Galactic evolution of sulphur and zinc
• Spectroscopic Validation of Low-Metallicity Stars from RAVE
• G64-12 and G64-37 are Carbon-Enhanced Metal-Poor Stars
• SPLUSJ210428.01-004934.2: An Ultra Metal-Poor Star Identified from Narrowband Photometry
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• The Galactic Distribution of Phosphorus: A Survey of 163 Disk and Halo Stars
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• The Chemical Evolution of Iron-Peak Elements with Hypernovae
• The S-PLUS Ultra-Short Survey: first data release
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• Revisiting the iron abundance in the hyper iron-poor star HE 1327-2326 with UV COS/$HST$ data
• The R-Process Alliance: A Nearly Complete R-Process Abundance Template Derived from Ultraviolet Spectroscopy of the R-Process-Enhanced Metal-Poor Star HD 222925