Other
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.344...45o&link_type=abstract
Nature (ISSN 0028-0836), vol. 344, March 1, 1990, p. 45-47.
Other
59
Bl Lacertae Objects, Gravitational Lenses, Elliptical Galaxies, Emission Spectra, Quasars, Red Shift, Spatial Distribution
Scientific paper
The possibility that many BL Lacertae objects seen in nearby galaxies are in fact images, gravitationally lensed and substantially amplified by stars in the nearby galaxy, of background objects is addressed. It is argued that the distribution of BL Lac redshifts is hard to understand without gravitational lensing, unless we happen to be at a very local maximum of the spatial cosmic distribution of BL Lacs. The analysis indicates that the galaxies whose stars are likely to act as microlenses will be found in two peaks, one nearby with redshift 0.05-0.10, and the other near the distant quasar.
Ostriker Jeremiah P.
Vietri Mario
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