ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Rieke et al.1'2 recently detected several objects at 2.2 jxm in optically blank fields of flat spectrum radio sources3 4, and derived such large IR/optical spectral indices (a = -d In flux density/d In frequency) aKB 3 that they proposed a new class of quasar, because other properties of the ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/292814a0
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