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F$k.

2M8%
[1℄ Vogel, H. C., 1890: Sppe trographis he Beoba htungen an Algol.
Astron. N a hr ., Vol. 123, p. 289[2℄ Pi kering, E. C., 1881: Variable Stars of Short Period. Observatiry,Vol. 4, p. 225[3℄ Belopolski, A., 1894: The Spe trum of Æ Cephei. Astrophys. J .,Vol. 1, p. 160[4℄ Clerke, A., 1903: P roblems in Astrophysi s.

JPGT$N'K[5℄ Brunt, D., 1913: Some Problems if Astronomy, I. The Problem of
the Cepheid variables. Observatroy, Vol. 36, p. 59

J@8j>$N'K[6℄ S hwarzs hild, K., 1900:.
P ubl. v . Kuf f ners hen Sternwarte, Vol. 5, C100
[7℄ Shapley, H., 1914: On the Nature and Cause of Cepheid Variation.
Astrophys. J ., Vol. 40, p. 448[8℄ Ritter, A., 1879:

J@8j>$N'K.

W iedemanns Annalen, Vol. 8, p. 172[9℄ Oke, J. B., 1961: An Analysis of the Absolute Energy Distribution
in the Spe trum of Eta Aquilae. Astrophys. J ., Vol. 133, p. 90[10℄ Baker, N., Kippenhahn, R., 1962: The Pulsations of Models of Æ
Cephei Stars. Z: Astrophys., Vol. 54, p. 114[11℄ Baker, N., Kippenhahn, R., 1965: The Pulsations of Models of
Delta Cephei Stars. II. Astrophys: J ., Vol. 142, p. 868[12℄ Leavitt, H. S., 1908: 1777 Variables in the Magellani Clouds.
Annals Harvard College Observatory , Vol. 60, p. 87

14[13℄ Pi kering, E. C., 1912: Periods of 25 Variable Stars in the Small
Magellani Cloud. Harvard College Observatory Cir ular, Vol.
173, p. 1 E. C. Pi kering Leavitt

$kK

J

,

N&frRp9kAKJCF[14℄ Hertzsprung, E., 1914: Uber
die Raumli he Verteilung der Veranderli hen vom Æ Cephei-Typus. Astron. N a hr., Vol. 196, p. 201[15℄ Kapteyn, J., 1902: On the Luminosity of the Fixed Stars. P ubl.
Kapteyn Astron. Lab. Groningen, Vol. 11, p. 3
[16℄ Ikaunieks, J., 1975: Long-period Variables of the Mira Ceti Type.
P ulsating Stars, eds. B. V. Kukarkin, Chap. 9. Translated from
Russian edition published 1970.

Qw1N<H No. 1 .0Qw1N/+
2008 / 1 nx.+3&fj) 980-0811 gfTDUhlV. 1-8-10-504

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