ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Markarian 231 is such a Seyfert galaxy with a very luminous nucleus. Arakelian et al.6 find an emission redshift of z = 0.041. Using a Hubble constant of 50 km s?1 Mpc-?1 and the photographic magnitude 14.1 given by Zwicky and Herzog7, we find an intrinsic photographic magnitude Mp= ?22.9. (The ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/238263a0
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