Direct detection of dark matter from TwQSO microlensing

Details Direct detection of dark matter from TwQSO microlensing Direct detection of dark matter from TwQSO microlensing

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aipc..336...95s&link_type=abstract

Dark matter. AIP Conference Proceedings, Volume 336, pp. 95-98 (1995).

Physics

6

Dark Matter, Gravitational Lenses And Luminous Arcs

Scientific paper

Gravitational microlensing in the direction of Q0957+561 A, B (TwQSO) is expected to show the spectrum of mass objects in the z=0.37 lens galaxy, because the existence of a widely separated double image implies a microlensing optical depth near unity. In our 15 year record of brightness of the two quasar images, we find evidence for a range of masses from approximately 0.1 Mo to 10-5 Mo. These are evidenced by continuous power in the Fourier power spectrum of the observed microlensing over a range of frequencies from 0.1 to 4 cycles per year. A sharp high frequency cutoff (lower mass bound) is found.

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