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On the Distance to the Open Cluster Lyngå 6

Published online by Cambridge University Press:  12 April 2016

E. R. Anderson ,
B. F. Madore  and
M. H. Pedreros
E. R. Anderson
Affiliation:
Dept. of Astronomy, Univ. of Toronto, Toronto, Ontario
B. F. Madore
Affiliation:
Dept. of Astronomy, Univ. of Toronto, Toronto, Ontario
M. H. Pedreros
Affiliation:
Dept. of Astronomy, Univ. of Toronto, Toronto, Ontario

Extract

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The determination of the membership of the Cepheid TW Normae to the galactic cluster Lyngå. 6 is important because TW Nor would then be the intrinsically brightest Cepheid associated with a cluster.

A series of nine photographic exposures (three each in U,B and V) were obtained during open time at the Anglo-Australian Telescope. The plates were measured with an iris photometer and the data calibrated using the photoelectric standards of van den Bergh and Harris (1976). The data for 300 stars were then analysed using a new computerized method of main sequence fitting and cluster membership determination developed by Pedreros (1984). We found 41 member stars with a mean reddening E(B-V)=1.33±0.10 and a distance modulus of 11.1±0.4 magnitudes.

Type
Part III. Extragalactic Cepheids and the PL Relation
Information
International Astronomical Union Colloquium , Volume 82: Cepheids: Theory and Observations , 1985 , pp. 203 - 204
Copyright
Copyright © Cambridge University Press 1985

References

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Pedreros, M. H. 1984, Ph.D. Thesis, University of Toronto.Google Scholar
Welch, D. L., Wieland, F., McAlary, V. W., McGonnegal, R., Madore, B. F., McLaren, R. A., and Neugebauer, G. 1984a, Ap.J. Supp., 54, 547.CrossRefGoogle Scholar
Welch, D. L., McAlary, C. W., Madore, B. F., McLaren, R. A. and Neugebauer, G. 1984b, In preparation.Google Scholar