ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Close pairs of QSOs have conventionally been placed in three categories, each implying a very different physical interpretation. (1) Pairs wtih very small angular separation (=£7 arc s) but with identical redshifts are interpreted as gravitationally lensed images of a single object; (2) pairs ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/317413a0
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