Cosmochemistry, Cosmology, and Fundamental Constants High-Resolution Spectroscopy of Damped Lyman-Alpha Systems
نویسندگان
چکیده
R. Quast, D. Reimers Hamburger Sternwarte, Universität Hamburg, D-21029 Hamburg, Germany A. Smette, O Garcet Institut d’Astrophysique et de Géophysique, Université de Liège, B-4000 Liège, Belgium C. Ledoux European Southern Observatory, Santiago, Chile S. Lopez Departamento de Astronomía, Universidad de Chile, Santiago, Chile L. Wisotzki Astrophysikalisches Institut Potsdam, D-14482 Potsdam, Germany
منابع مشابه
Adaptive Optics Imaging of Low-redshift Damped Lyman-alpha Quasar Absorbers
We have carried out a high angular resolution near-infrared imaging study of the fields of 6 quasars with 7 strong absorption line systems at z < 0.5, using the Hokupa’a adaptive optics system and the QUIRC near-infrared camera on the Gemini-North telescope. These absorption systems include 4 classical damped Lyman-alpha absorbers (DLAs), 2 sub-DLAs, and one Lyman-limit system. Images were obta...
متن کاملDamped Lyman Alpha Systems at High Redshift and Models of Protogalactic Disks
We employ observationally determined intrinsic velocity widths and column densities of damped Lyman-alpha systems at high redshift to investigate the distribution of baryons in protogalaxies within the context of a standard cold dark matter model. We proceed under the assumption that damped Lyman alpha systems represent a population of cold, rotationally supported, protogalactic disks and that ...
متن کاملar X iv : a st ro - p h / 95 03 08 9 v 1 2 4 M ar 1 99 5 High Redshift Lyman Limit and Damped Lyman - Alpha Absorbers
To appear in " ESO Workshop on QSO Absorption Lines " Preprint: astro-ph/yymmddd Abstract We have obtained high signal:to:noise optical spectroscopy at 5 ˚ A resolution of 27 quasars from the APM z>4 quasar survey. The spectra have been analyzed to create new samples of high redshift Lyman-limit and damped Lyman-α absorbers. These data have been combined with published data sets in a study of t...
متن کاملFirst Investigation of the Clustering Environment of Damped Lyman Α Absorbers at Z ≃
We report the first observations of the clustering environment of damped Lyman α absorption systems at z ≃ 4. Color selection and photometric redshifts were used to select 44 candidate Lyman-break galaxies brighter than IAB = 25.5 from deep BRI images of the 35 arcmin 2 field containing the quasar BR 0951−04. Multislit spectroscopy of 35 candidate galaxies was performed and 8 of these candidate...
متن کاملThe first detection of cobalt in a damped Lyman alpha system
The study of elemental abundances in damped Lyman alpha systems (DLAs) at high redshift represents one of our best opportunities to probe galaxy formation and chemical evolution at early times. By coupling measurements made in high-z DLAs with our knowledge of abundances determined locally and with nucleosynthetic models, we can start to piece together the star formation histories of these gala...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005