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A multi-wavelength study of the gravitational lens COSMOS J095930+023427

Paolillo, Maurizio; Cao, Shuo; Zhu, Zong-Hong +1 more

We present a multi-wavelength study of the gravitational lens COSMOS J095930+023427 (z₁ = 0.892), together with the associated galaxy group along the line of sight located at z ~ 0.7, and the lensed background galaxy. The source redshift is currently unknown, but estimated to be at z_s ~ 2. This analysis is based on publicly a…

Gravitationally lensed extended sources: the case of QSO RXJ0911

Diep, Pham Ngoc; Nhung, Pham Tuyet; Hoai, Do Thi +6 more

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, has important consequences on t…