Infrared observations of the gravitational lens system B 1422 + 231
نویسندگان
چکیده
Images of the multiple-component radio source B1422 + 231 at 2.2 pm show the structure of this source to be essentially the same at radio and infrared frquencies. The most natural explanation for this achromatic structure is gravitational lensing.
منابع مشابه
Shear Acting on Gravitational Lens B 1422 + 231 1
In a number of multiply imaged quasar systems, a significant contribution to the lensing potential is provided by groups and clusters of galaxies associated with the primary lens. As part of an ongoing effort to gather observational data on these systems, we present spectroscopy and near-infrared and optical photometry of galaxies in the field of the quadruple lens system B 1422+231. The spectr...
متن کاملMilliarcsec - scale polarisation observations of the gravitational lens B 1422 + 231
We present polarisation observations of the gravitational lens system B1422+231 made at 8.4 GHz using the VLBA and the 100m telescope at Effelsberg. All four images of the quasar show structure on the milliarcsec scale. The three bright images show tangential stretching as expected from lens models. Some basic properties of gravitational lensing are exhibited by this system. The surface brightn...
متن کاملThe External Shear Acting on Gravitational Lens
In a number of multiply imaged quasar systems, a significant contribution to the lensing potential is provided by groups and clusters of galaxies associated with the primary lens. As part of an ongoing effort to gather observational data on these systems, we present spectroscopy and near-infrared and optical photometry of galaxies in the field of the quadruple lens system B 1422+231. The spectr...
متن کاملDetermination of time delay from the gravitational lens B 1422 + 231
We present the radio light curves of lensed images of the gravitational lens B1422+231. The observations have been carried out using the VLA at 8.4 and 15 GHz over a period of 197 days. We describe a method to estimate the time delay from the observed light curves. Using this method, our cross-correlation analysis shows that the time delay between images B and A is 1.5±1.4d, between A and C is ...
متن کاملRedshifts of the Gravitational Lenses B 1422 + 231 and PG 1115 + 080 1
B1422+231 and PG1115+080 are gravitational lens systems producing quadruple QSO images where there is real promise that time delays can constrain the Hubble constant. In addition, the lensing galaxies are both part of groups which can play an important role in modelling the lens potential. This article reports redshifts for the lensing galaxies and three neighboring galaxies in each of the two ...
متن کامل