An observational constraint on gravitational lensing by objects of mass 10^(9.5) - 10^(10.9) Mo
Pedro Augusto; Peter N. Wilkinson · 2000 · arXiv
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
The finding, in one line
“A radio-based search for strong gravitational lensing, with image separations in the range 160-300 milliarcsec (mas), has yielded a null result for a sample of 1665 sources (Augusto, Wilkinson & Browne 1998) whose mean redshift is estimated to be ~1.”
Abstract (excerpt)
A radio-based search for strong gravitational lensing, with image separations in the range 160-300 milliarcsec (mas), has yielded a null result for a sample of 1665 sources (Augusto, Wilkinson & Browne 1998) whose mean redshift is estimated to be ~1.3. The lensing rate for this previously-unexplored separation range, <1:555 at the 95% confidence level, is less than on arcsecond-scales - as expected from models of lensing galaxy populations. Lensing on 160-300 mas scales is expected to arise predominantly from spiral galaxies at a rate dependent on the disk-halo mass ratio and the evolving numb
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Metadata source: arXiv