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New stellar associations in M33 galaxy

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Abstract

Extending the numeration of Humphreys and Sandage (1980) 54 new associations are identified in the galaxy M33 by comparing the plates in theU andB system. The larger part of the associations are located in the spiral arms. The young associations are prevailing in proximity to the nucleus. A large part of the newly identified associations are connected withHii regions. Judging by the farthest associations M33 diameter is estimated 20 kpc. The associations outline two strong and two faint spiral arms up to 4 kpc away from the nucleus. Their possible behaviour is observed in the further parts.

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Authors and Affiliations

  1. Department of Astronomy, University of Sofia, Bulgaria

    P. Z. Kunchev & G. R. Ivanov

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  1. P. Z. Kunchev
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  2. G. R. Ivanov
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Kunchev, P.Z., Ivanov, G.R. New stellar associations in M33 galaxy. Astrophys Space Sci 106, 371–379 (1984). https://doi.org/10.1007/BF00650361

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  • DOI: https://doi.org/10.1007/BF00650361

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