Evidence for secondary gravitationally lensed images in radio quasistellar objects

Details Evidence for secondary gravitationally lensed images in radio quasistellar objects Evidence for secondary gravitationally lensed images in radio quasistellar objects

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phdt.........2r&link_type=abstract

Ph.D. Thesis Oklahoma Univ., Norman.

Astronomy and Astrophysics

Astronomy

Gravitational Lenses, Quasars, Radio Stars, Radio Sources (Astronomy)

Scientific paper

Evidence was sought for the observability of the gravitational lens effect by studying the internal radio structures of quasistellar objects. Since the majority of the radio emitting quasars have been observed to be multiply structured at radio wavelengths, and since the gravitational deflection of light is essentially frequency independent, these sources are very suitable objects for the investigation of gravitational imaging. From the theoretical framework of gravitational imaging, several selection criteria were imposed on a sample of 208 radio emitting quasars in order to filter out only those sources which may be exhibiting radio imaging. The employment of further selection criteria resulted in a small filtered sample of 10 quasars which are good candidates for exhibiting the gravitational lens effect.

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