Qso Absorption Lines: Proceedings of the Eso Workshop Held at Garching, Germany, 21-24 November 1994

ISBN-13: 9783662223734 / Angielski / Miękka / 2014 / 471 str.

Georges Meylan

Opis

The controversial question of whether the majority of the narrow absorption lines observed in QSO spectra represent cosmological intervening systems or ejecta from the QSO themselves is settled. QSO absorption line spectroscopy, initially a mere technique, has matured into an essential extragalactic research tool for understanding the content of the Universe at redshifts between 0 and 4, and beyond. The only previous important meeting devoted to "QSO Absorption Lines" was held in May 1987 at the Space Telescope Science Institute in Baltimore, Maryland, U.S.A. Since that time, nearly a decade ago, research has been ex tremely active in this now well-established field of astrophysics. Theoretical stud ies and simulations have taken advantage of the constant progress in computer technology, and during these last few years, the observational results have bene fited largely from the new facillities offered by the Hubble Space Telescope in the UV wavelength range and the Keck Telescope for high-resolution spectroscopy."

Spis treści

Contents: QSO Absorption Lines: Progress, Problems, and Opportunities.- Damped Lyman-Alpha Systems.- Abundances.- Absorption Lines from Gas in Our Galaxy.- Metal-Rich Systems at Low and Intermediate Redshifts.- BAL QSOs and Quasar Environment.- Lyman-Alpha Systems at Low and High Redshifts.- Large-Scale Structure.- The UV Background.- Formation of Absorbing Systems.- Workshop Summary and Conclusion

Blurb

These proceedings contain the papers presented at the ESO workshop on "QSO Absorption Lines". The papers summarize the current state of understanding and review the new observations, especially from HST and Keck, as well as the theoretical insights. The different sections address the following topics: damped Lyman-alpha systems, abundances, absorption lines from gas in our Galaxy, metal-rich systems at low and intermediate redshifts, BAL QSOs and quasar environment, Lyman-alpha systems at low and high redshifts, large-scale structure, the UV background, and formation of absorbing systems. The book is meant for graduate students and researchers.