Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Abundances in the Galaxy: field stars
- Part II Abundances in the Galaxy: Galactic stars in clusters, bulges and the centre
- Part III Observations – abundances in extragalactic contexts
- 16 Stellar abundances of early-type galaxies
- 17 Measuring chemical abundances in extragalactic metal-rich H ii regions
- 18 On the maximum oxygen abundance in metal-rich spiral galaxies
- 19 Starbursts and their contribution to metal enrichment
- 20 High metallicities at high redshifts
- 21 Evolution of dust and elemental abundances in quasar DLAs and GRB afterglows as a function of cosmic time
- 22 Dust, metals and diffuse interstellar bands in damped Lyman-alpha systems
- 23 Tracing metallicities in the Universe with the James Webb Space Telescope
- Part IV Stellar populations and mass functions
- Part V Physical processes at high metallicity
- Part VI Formation and evolution of metal-rich stars and stellar yields
- Part VII Chemical and photometric evolution beyond Solar metallicity
21 - Evolution of dust and elemental abundances in quasar DLAs and GRB afterglows as a function of cosmic time
Published online by Cambridge University Press: 02 December 2009
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Abundances in the Galaxy: field stars
- Part II Abundances in the Galaxy: Galactic stars in clusters, bulges and the centre
- Part III Observations – abundances in extragalactic contexts
- 16 Stellar abundances of early-type galaxies
- 17 Measuring chemical abundances in extragalactic metal-rich H ii regions
- 18 On the maximum oxygen abundance in metal-rich spiral galaxies
- 19 Starbursts and their contribution to metal enrichment
- 20 High metallicities at high redshifts
- 21 Evolution of dust and elemental abundances in quasar DLAs and GRB afterglows as a function of cosmic time
- 22 Dust, metals and diffuse interstellar bands in damped Lyman-alpha systems
- 23 Tracing metallicities in the Universe with the James Webb Space Telescope
- Part IV Stellar populations and mass functions
- Part V Physical processes at high metallicity
- Part VI Formation and evolution of metal-rich stars and stellar yields
- Part VII Chemical and photometric evolution beyond Solar metallicity
Summary
We present results from comparisons of elemental abundances and dust content between damped Lyman-alpha (DLA) absorbers and gamma-ray-burst (GRB) afterglows, as determined by absorption-line spectroscopy. Our sample of DLA absorbers includes the results from 76 quasar spectra taken with the HIRES spectrograph of the Keck observatory, from which we obtain a sample of 38 DLA absorbers in the redshift range 2 < z < 4. The GRB absorption lines were obtained in collaboration with the Caltech Carnegie NOAO GRB collaboration, in which rapid spectroscopy is obtained from newly discovered GRBs, to obtain high-quality optical spectra. We present results of O, N, C, Si, Zn, Cr, and C II*/C II ratios from a “core sample” of 15 of the best of the DLA absorbers, and detailed analysis of GRB 051111 and GRB 050505, which are at redshifts of z = 1.549 and 4.275, respectively. From our analysis we can see trends in the DLA dust content, and in [C/H], [N/H] and [O/H] values as a function of DLA redshift, as well as evidence for dust formation and highly excited dense gas within the disks of GRB host galaxies.
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- The Metal-Rich Universe , pp. 199 - 204Publisher: Cambridge University PressPrint publication year: 2008