Abstract
The distribution of long-period Population I cepheids is studied. An age comparison of cepheids and galactic clusters shows that cepheids with periods > 11.25 d, corresponding to ages of ≲ 30 × 106 yr, should be almost as good spiral arm tracers as galactic clusters with earliest types b 2–3. The distances of cepheids are determined from a revised period-luminosity-colour relation and from colour excesses, for the determination of which a new, purely photometric method is given. The resulting distribution of cepheids shows a good correlation with the spiral arms, as traced by young clusters.
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Tammann, G.A. (1970). The Galactic Distribution of Young Cepheids. In: Becker, W., Contopoulos, G. (eds) The Spiral Structure of Our Galaxy. International Astronomical Union / Union Astronomique Internationale, vol 38. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3275-9_43
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DOI: https://doi.org/10.1007/978-94-010-3275-9_43
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