0 Lost and Found : The Damped Lyman Alpha Absorbers in the QSO OI 363 1 Judith

نویسنده

  • Judith G. Cohen
چکیده

The galaxy giving rise to the damped Lyα absorbing system in the QSO OI 363 with z = 0.221 has been found. A galaxy which is probably associated with the second DLA in this same QSO at z = 0.0912 has also been found. Neither galaxy is very luminous, and neither galaxy shows signs of extensive current star formation, a massive disk or lots of gas. The impact parameters for each of the two galaxies with respect to the QSO are reasonable. If most DLA absorbers arise in such low luminosity galaxies, it will be difficult to pick out the correct galaxy giving rise to DLA systems at high redshift within the large projected areal density on the sky of faint galaxies around distant QSOs. Subject headings: quasars: absorption lines; quasars: individual (OI 363); galaxies: halos

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ar 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 کامل

Nature and evolution of Damped Lyman alpha systems

The main properties of Damped Lyman alpha (DLA) systems are briefly reviewed with the aim of studying the nature and evolution of the galaxies associated with this class of QSO absorbers. Candidate DLA galaxies identified at z ≤ 1 in the fields of background QSOs show a variety of morphological types without a predominance of spirals. Most properties inferred from spectroscopic studies at z ≥ 1...

متن کامل

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 کامل

First Investigation of the Clustering Environment of Damped Lyman Α Absorbers at Z ≃ 4

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 identify 46 candidate Lyman-break galaxies from deep BRI images of the field containing the quasar BR 0951−04. Spectroscopic confirmation of 10 Lyman-break galaxies indicates that half of this population may be missed by color selec...

متن کامل

Hi 21cm Absorption in Two Low Redshift Damped Lyα Systems

We report the discovery of two low redshift HI 21cm absorbers, one at z = 0.2212 towards the z em = 0.630 quasar OI 363 (B0738+313), and the other at z = 0.3127 towards PKS B1127-145 (z em = 1.187). Both were found during a survey of MgII selected systems at redshifts 0.2 < z < 1 using the new UHF-high system at the Westerbork Synthesis Radio Telescope (WSRT). New HST/FOS observations also iden...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008