SIMBAD references

2006MNRAS.370...43M - Mon. Not. R. Astron. Soc., 370, 43-62 (2006/July-3)

Elemental abundance measurements in low-redshift damped Lyman α absorbers.

MEIRING J.D., KULKARNI V.P., KHARE P., BECHTOLD J., YORK D.G., CUI J., LAUROESCH J.T., CROTTS A.P.S. and NAKAMURA O.

Abstract (from CDS):

We present elemental abundance measurements for nine damped Lyman α (Lyα) systems (DLAs) and one sub-DLA at 0.1 ≲ z ≲ 1.5 from recent observations with the Multiple Mirror Telescope (MMT). Most of these absorbers are found to be metal poor, while two are found to have ~30-50 per cent solar metallicities. Combining our data with other data from the literature, we find that the systems with higher [Zn/H] also have stronger depletion as measured by [Cr/Zn] and [Fe/Zn]. The relationship between the metallicity and Hi column density is also investigated. Together with our previous MMT survey, we have discovered two of the four known absorbers at z < 1.5 that lie above (although near) the `obscuration threshold'. This appears to be a result of selecting absorbers with strong metal lines in our sample. It would be interesting to find other similar systems by observing a larger sample and study how much such systems contribute to the cosmic budget of metals. Finally, an analysis of the NHi-weighted mean metallicity versus redshift for our sample combined with data from the literature supports previous conclusions that the NHi-weighted mean global DLA metallicity rises slowly at best and falls short of solar levels by a factor of >4 even at z = 0.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): ISM: abundances - dust, extinction - quasars: absorption lines

Nomenclature: Tables 2, 3: [MKK2006b] QSO JHHMM+DDMM abs N.NNN, [MKK2006b] QSO JHHMM+DDMM abs N.NNNN, N=18.

CDS comments: Tables 2, 3: QSO J1715+4606 not identified.

Simbad objects: 12

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