Gravitationally lensed extended sources: the case of QSO RXJ0911
| Autor: | Frederic Boone, P. N. Dong, Pham Ngoc Diep, Pierre Darriulat, Pham Tuyet Nhung, Pham Tuan Anh, Nguyen Thi Thao, Do Thi Hoai, Nguyen Van Hiep |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physics
Brightness FOS: Physical sciences Astronomy and Astrophysics Quasar Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Submillimeter Array Astrophysics - Astrophysics of Galaxies Galaxy Redshift Gravitational lens Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Caustic (optics) Image resolution Astrophysics::Galaxy Astrophysics |
| Popis: | After a brief reminder of the mechanism of gravitational lensing of extended sources, the particular case of the host galaxy of QSO RXJ0911, a high redshift (z~2.8) quadruply imaged quasar, is explored. The non linearity of the problem, together with the proximity of the source to a cusp of the lens inner caustic, have important consequences on the dependence of the image appearance on the size and shape of the source. Their expected main features and their interpretation in terms of source extension and shape are investigated in a spirit of simplicity and in preparation for the analysis of high sensitivity and spatial resolution images that will soon be within reach with the completion of the Atacama Large Millimeter/submillimeter Array (ALMA). In particular, the information on source size carried by relative image brightness is discussed. Extension of the results to other types of quadruply imaged quasars is briefly considered. 12 pages, 10 figures, journal article |
| Databáze: | OpenAIRE |
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