| Autor: |
Turner, D. G., Forbes, D., English, D., Leonard, P. J. T., Scrimger, J. N., Wehlau, A. W., Phelps, R. L., Berdnikov, L. N., Pastukhova, E. N. |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society; Jul2008, Vol. 388 Issue 1, p444-456, 13p, 1 Black and White Photograph, 6 Charts, 8 Graphs |
| Abstrakt: |
Photoelectric, photographic and CCD UBV photometry, spectroscopic observations and star counts are presented for the open cluster Berkeley 58 to examine a possible association with the 4.37 d Cepheid CG Cas. The cluster is difficult to separate from the early-type stars belonging to the Perseus spiral arm, in which it is located, but has reasonably well-defined parameters: an evolutionary age of ∼108 yr, a mean reddening of s.e. and a distance of s.d.). CG Cas is a likely cluster coronal member on the basis of radial velocity, and its period increase of and large light amplitude describe a Cepheid in the third crossing of the instability strip lying slightly blueward of strip centre. Its inferred reddening and luminosity are s.e. and . A possible K supergiant may also be a cluster member. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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