SIMBAD references

2002NewA....7..577P - New Astronomy, 7, 577-586 (2002/November-0)

A new measurement of zinc metallicity in a DLA at z ∼ 3.35.

PEROUX C., PETITJEAN P., ARACIL B. and SRIANAND R.

Abstract (from CDS):

We present chemical abundance measurements in the zabs=3.35045 Damped Lyman-alpha (DLA) system observed in the UVES spectrum of the BAL quasar BR 1117-1329. We measure a neutral hydrogen column density N(HI)=6.9±1.7*1020 atoms cm-2 and derive mean abundances relative to solar: [Si/H]=-1.26±0.13, [Fe/H]=-1.51±0.13, [Ni/H]=-1.57±0.13, [Cr/H]=-1.36±0.13, [Zn/H]=-1.18±0.13, [Al/H]>-1.25, [O/H]>-1.25 and [N/H]←2.24. This is the third measurement of Zn, an element mildly depleted onto dust grain, at zabs>3. The iron to zinc and chromium to zinc ratios, [Fe/Zn]=-0.33±0.05 and [Cr/Zn]=-0.18±0.05 demonstrate that the absorber has a low dust content. The nitrogen ratio [N/Si]←0.98 suggests that the `secondary' N production process is taking place in this DLA. Finally, this absorber does not seem to present a convincing alpha-enhancement as shown by the alpha over Fe-peak element ratios: [Si/Fe]=0.25±0.06, [Si/Cr]=0.10±0.06 and [Si/Zn]=-0.08±0.06.

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Journal keyword(s): Galaxies: abundance - Galaxies: high-redshift - Quasars: absorption lines - Quasars: individual: BR 1117-1329

Nomenclature: Tables 2, 3: [PPA2002] QSO J1120-1346 abs 3.35045 N=1. [PPA2002] QSO J1120-1346 abs N.NNNNNN N=10.

Simbad objects: 1

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