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A DIGITAL ANALYSIS OF THE COLOR STRUCTURE WITHIN MESSIER 51
SIMON P. WORDEN
Publications of the Astronomical Society of the Pacific
Vol. 86, No. 509 (February 1974), pp. 92-98
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40675503
Page Count: 7
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Blue and visual photographic plates of Messier 51 have been digitally analyzed to give computer produced (B— V) maps of M51. The technique used to accomplish this is described and this material is compared with the preliminary Westerbork 21-cm neutral hydrogen data. The indication of a ring of blue stars in the nucleus of M51 is reported.
Publications of the Astronomical Society of the Pacific © 1974 The University of Chicago Press