Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...198...49s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 198, no. 1-2, June 1988, p. 49-60.
Astronomy and Astrophysics
Astrophysics
39
Astronomical Spectroscopy, Gravitational Lenses, Quasars, Absorption Spectra, Astronomical Maps, Emission Spectra, Galactic Mass, Line Spectra, Very Large Array (Vla)
Scientific paper
The authors have recently initiated a high resolution direct imaging survey of a selected sample of highly luminous quasars (HLQs). The observations are carried out with the 2.2 m telescope at ESO, and with the VLA at the NRAO, New Mexico. Following the first observing run at ESO, the authors have reported the discovery of a new gravitational lens system for the HLQ UM 673 = Q 0142-100. Additional observations supporting this interpretation are discussed here. Application of gravitational optometry to this system is given: a value of M0 = 2.4×1011M_sun; is derived for the mass of the lensing galaxy located between UM 673 A and B and a most likely estimate of Δt = 7 weeks is found for the expected delay between the arrival times of a similar variability event in the two lensed images of the quasar (H0 = 75 km s-1Mpc-1, q0 = 0).
Borgeest Ulf
Courvoisier Thierry J. -L.
Kayer R.
Kellermann Kenneth I.
Kuhr H.
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