Abstract
view Abstract Citations (37) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Formation of Disk Galaxies at High Redshift: Observations of Damped Lyman-Alpha Absorption in High-Redshift QSOs Smith, Harding E. ; Cohen, Ross D. ; Bradley, Steven E. Abstract We present here observations at 3 Å resolution which confirm damped Lyα profiles for a number of candidate galaxy disk absorption systems in a sample of high-redshift QSOs. A combination of strong, self-damped Lyα absorption plus blended narrow absorption features adequately fits the data for 18 systems in 15 objects. This is at least a factor of five in excess of the number of galaxy disks expected to be intercepted by lines of sight to this sample of QSOs. These results imply that approximately 20% of the sky is covered by gaseous disks to a column density, NH I > 2 × 1020 cm-2 in the redshift interval z 2-3. We suggest that gaseous disks form relatively early in galaxies and that they may be considerably larger at early epochs. Publication: The Astrophysical Journal Pub Date: November 1986 DOI: 10.1086/164710 Bibcode: 1986ApJ...310..583S Keywords: Absorption Spectra; Disk Galaxies; Galactic Evolution; Lyman Alpha Radiation; Quasars; Red Shift; Line Spectra; Space Density; Spectrum Analysis; Astrophysics; GALAXIES: FORMATION; LINE PROFILES; QUASARS full text sources ADS | data products NED (27) SIMBAD (15)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
