A direct gravitational lensing test for 10 exp 6 solar masses black holes in halos of galaxies

Details A direct gravitational lensing test for 10 exp 6 solar masses black holes in halos of galaxies A direct gravitational lensing test for 10 exp 6 solar masses black holes in halos of galaxies

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...397l...1w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 397, no. 1, p. L1-L4.

Astronomy and Astrophysics

Astronomy

39

Black Holes (Astronomy), Galactic Structure, Gravitational Lenses, Quasars, Astronomical Maps, Galactic Mass, Very Long Baseline Array (Vlba)

Scientific paper

We propose a method that will be able to detect or exclude the existence of 10 exp 6 solar masses black holes in the halos of galaxies. VLBA radio maps of two milliarcsecond jets of a gravitationally lensed quasar will show the signature of these black holes - if they exist. If there are no compact objects in this mass range along the line of sight, the two jets should be linear mappings of each other. If they are not, there must be compact objects of about 10 exp 6 solar masses in the halo of the galaxy that deform the images by gravitational deflection. We present numerical simulations for the two jets A and B of the double quasar 0957 + 561, but the method is valid for any gravitationally lensed quasar with structure on milliarcsecond scales. As a by-product from high-quality VLBA maps of jets A and B, one will be able to tell which features in the maps are intrinsic in the original jet and which are only an optical illusion, i.e., gravitational distortions by black holes along the line of sight.

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