Gravitational lensing of quasars

著者

• Eigenbrod, Alexander

書誌事項

Gravitational lensing of quasars

by Alexander Eigenbrod

EPFL Press, c2012

• hbk.

注記

Includes bibliography and index

内容説明・目次

内容説明

The universe, in all its richness, diversity and complexity, is populated by a myriad of intriguing celestial objects. Among the most exotic of them are gravitationally lensed quasars. A quasar is an extremely bright nucleus of a galaxy, and when such an object is gravitationally lensed, multiple images of the quasar are produced - this phenomenon of cosmic mirage can provide invaluable insights on burning questions, such as the nature of dark matter and dark energy. After presenting the basics of modern cosmology, GravItational Lensing of Quasars describes active galactic nuclei, the theory of gravitational lensing, and presents a particular numerical technique to improve the resolution of astronomical data. The book then enters the heart of the subject with the description of important applica- tions of gravitational lensing of quasars, such as the measurement of the famous Hubble constant, the determination of the dark matter distribution in galaxies, and the observation of the mysterious inner parts of quasars with much higher resolutions than those accessible with the largest telescopes. This book gives an overview of the current status of research in the field of gravitationally lensed quasars. It also gives some insights about the way this research is conducted in practice, and presents real data and results obtained with several high-technology instruments of the Very Large Telescope of the European Southern Observatory.

目次

Foreword Introduction Outline Basics of modern cosmology The cosmological principle The Friedmann-Lemaitre-Robertson-Walker metric The Hubble constant Cosmological redshift Friedmann equations Energy components of Universe Critical density Density parameters Cosmological distances Observational cosmology The concordance model Unanswered questions Active galactic nuclei Classification scheme Unified scheme Radius-luminosity relationship Standard thin accretion disk model Problems with the standard thin accretion disk model Gravitational lensing Historical background Lens equation Deflection angle Deflection potential Arrival time and Fermat's principle Time delays and the Hubble constant Images and magnification of a lensed source Properties of ordinary images Critical curves and caustics The mass-sheet degeneracy Models of gravitational lenses Searches for new gravitationally lensed quasars Deconvolution Spatial deconvolution Time delays and the Hubble constant Introduction Observational and theoretical challenges Determination of the optimal monitoring strategy Methods to measure time delays COSMOGRAIL Discussion Redshift of lensing galaxies Introduction Spectroscopy with the Very Large Telescope Lens redshifts and dark energy Discussion Microlensing: a natural telescope Introduction Particularities of microlensing First microlensing techniques Applications of quasar microlensing The Einstein Cross QSO 2237+0305 Spectrophotometric monitoring of QSO 2237+0305 Energy profile of the accretion disk Discussion Dynamics versus gravitational lensing Introduction Integral-field spectroscopy with FLAMES Integral-field spectroscopy with SINFONI Long-slit spectroscopy with FORS2 Dynamical models of lensing galaxies Discussion General conclusions and outlook Bibliography

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詳細情報

• NII書誌ID(NCID): BB08039543
• ISBN:
  • 9781439873540
• 出版国コード: sz
• タイトル言語コード: eng
• 本文言語コード: eng
• 出版地: Lausanne
• ページ数/冊数: x, 142 p.
• 大きさ: 25 cm
• 分類:
  • DC23 : 523.115
• 件名:
  • LCSH : Quasars
  • LCSH : Gravitational lenses