... 35, No. 2, pp. 87­99. i Star Formation History in the Central Region of the Barred Galaxy NGC 4245 O. K. Sil'chenko1* , I. V. Chilingarian1, 2 , and V. L. Afanasiev 1 2 3 Sternberg Astronomical Institute, Universitetskii pr. ... The galaxy has been found to possess a pronounced chemically decoupled compact stellar nucleus, which is at least a factor of 2.5 richer in metals than the stellar population of the bulge, and a ring of young stars with a radius of 300 pc. ... NGC 4245. ...

... 000, 1­13 (2010) Printed 21 September 2011 A (MN L TEX style file v2.2) A universal ultraviolet-optical colour­colour­magnitude relation of galaxies I1gor V. Chilingarian1,2, and Ivan Yu. ... Received 2011 Sep 15; in original form 2011 Feb 6 ABSTRACT The bimodal galaxy distribution in the optical colour­magnitude diagram (CMD) comprises a narrow "red sequence" populated mostly by early-type galaxies and a broad "blue cloud" dominated by star-forming systems. ...