Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.322..805s&link_type=abstract
Nature (ISSN 0028-0836), vol. 322, Aug. 28, 1986, p. 805.
Astronomy and Astrophysics
Astronomy
6
Astronomical Spectroscopy, Background Radiation, Cosmic Rays, Quasars, Galactic Clusters, Radiation Distribution, Signal To Noise Ratios, String Theory
Scientific paper
Paczynski and Turner et al. have suggested that the extraordinary double quasar 1146+111B,C found by Hazard et al. is a possible gravitational lens. If the lensing object is a cluster of galaxies or a cosmic string, it may cause observable effects in the cosmic background radiation. The authors have searched for microwave background inhomogeneities near 1146+111B,C. An east-west strip of sky, 16 arc min long and centred on the point between the quasars, was observed with a beam of diameter 105 arc s at 3 mm wavelength. The observations show only noise with an r.m.s. noise level of 0.0010K. These observations set limits on the properties of the lensing object if it is a cosmic string or a cluster of galaxies, and the data do not confirm either hypothesis.
Dragovan Mark
Gott Richard J. III
Stark Alexander
Wilson Richard W.
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