Ultraviolet structure in the lensed QSOs 0957+561

Abstract

Imaging and spectra of the lensed QSO pair 0957+561 are presented and discussed. The data are principally those from the STIS NUV MAMA, and cover rest wavelengths from 850A to 1350A. The QSOs are both extended over about 1 arcsec, with morphology that matches with a small rotation, and includes one feature aligned with the VLBI radio jets. This is the first evidence of lensed structure in the host galaxy. The off-nuclear spectra arise from emission line gas and a young stellar population. The gas has velocity components with radial velocities at least 1000 km/s with respect to the QSO BLR, and may be related to the damped Ly alpha absorber in the nuclear spectra.

12 pages, including 1 table, plus 6 figures. To appear in AJ

References in corpus (1)

• The Host Galaxy of the Lensed Quasar Q 0957+561

Cited by in corpus (7)

• Measuring Microlensing using Spectra of Multiply Lensed Quasars
• New two-colour light curves of Q0957+561: time delays and the origin of intrinsic variations
• The influence of gravitational lensing on the spectra of lensed QSOs
• GLITP Optical Monitoring of QSO 0957+561: VR Light Curves and Variability
• Revealing the structure of the lensed quasar Q 0957+561 III. Constraints on the size of the broad-line region
• Structure function of the UV variability of Q0957+561
• Gravitationally lensed QSOs in the ISSIS/WSO-UV era