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1.430
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11.2
11.9
6.293
0.697
XB BQ
9.2
9.9
4.271
0.707
bB EW
7.8
8.2
5.820
0.707
1s?&k9B V1048 9.6
9.8
0.922
0.806

13

[JCF 0.8 Ka$,, 3lO, h 1 f60M0Hh 2 f60M0H,&8
7F$k+iG"kHra5lF$k.
+7*ZdB AS 1N~|f, 0.758 HJCF$k,, 3N3HO}@*C-~|N&fkL+iO}rOq7$. 3N1N~|fO 0.713 G"
kH$&Q,kLb"j, 3AiNMrQ$?&f@8b"k (19). 3N~|fO, p\M0Hh 1 f60M0HN~|fH7FdjOJ$.
3N=Khje2ilF$J$,, GaN@8Ghje2ilF$ksE~|1U'$IH7FO, 5|B Y 1, 5|B EY 1, 5|B GZ 1,
GSC 8691-1294 1, GSC 8607-0608 1JI,"k. 3liN1N~|f
O 0.702 +i 0.708 NVG"k (20).
dOObNsE~|1U'$IO, Q,,JaP, "k$O9GKy(
ilF$kQ,kLNrO,JaP, bCHt,}(kKc$J$. =7
F, Q,kL,}(kKDlF, 1N=$d, 1NbtG/-F$kaxN}r, =XH.JIKD$F, 77$N+r?(F/lkdj,+D+k
G"m&HWolk. +7*ZdB TU 1N, [o+HbWol?T,'
J}wN/++iO^C?sE~|1U'$INdjO, #eb&f,3
1ilk3HG"m&.

2M8%[1℄ Sanford, R. F., 1928: On the Variation of the Radial Velo ity of
TU Cassiopeiae. Astrophys. J ., Vol. 68, p. 169[2℄ Worley, C. E., Eggen, O. J., 1957: The Pe uliar Light Variation of
TU Cas. Astron. J ., Vol. 62, p. 104[3℄ Oosterho , P. Th., 1957: The Light-Variation and the RadialVelo ity Curve of TU Cas Explained in Term of a Primary Period
and a Beat Period. Bull. Astron. I nst. N etherl., Vol. 13, p. 320[4℄ Oosterho , P. Th., 1957: U Trianguli Australis, a Classi al Cepheid
14

with Se ondary Period. B ull. Astron. I nst. N etherl., Vol. 13, p.
317[5℄ Epstein, I., 1950: Pulsation Properties of Giant-Star Models.
Astrophys. J ., Vol. 112, p. 6
[6℄ Cox, J. P., King, D. S., Stellingwerf, R. F., 1972: Theoreti al Pulsation Constants and Cepheid Masses. Astrophys. J ., Vol. 171, p.
93[7℄ Takeuti, M., 1958: The Masses of Pulsating Stars. S i. Rep. T o^hoku
U niv ., Ser . I, Vol. 42, p. 72[8℄ Rodgers, A. W., 1970: The Masses of Pulsating Stars. M on. N ot.
Roy . Astron. S o ., Vol. 151, p. 133[9℄ Takeuti, M., 1973: On the Pulsation Masses of the Classi al
Cepheids. P ubl. Astron. S o . J apan, Vol. 25, p. 567[10℄ Cox, A. N., Hodson, S. W., Henden, A. A., King, D. S., 1977: The
Masse of AC Andromedae, U Triangli Australis, and BC Dra onis.
Astrophys. J ., Vol. 212, p. 451[11℄ Petersen, J. O., 1973: Masses of Double Mode Cepheid Variables
Determined by Analysis of Period Ratios. Astron. Astrophys., Vol.
27, p. 89[12℄ Efremov, Yu. N., Kholopov, P. N., 1975: Double Mode Cepheid
V367 S t in Open Cluster NGC 6649. I nf . B ull. V ar. S tars, No.
1073, p. 1
[13℄ Kobayashi. E., Saio, H., Takeuti, M., 1976: The Mass of the Doublemode Cepheid V367 S uti. S i. Rep. T o^hoku U niv., S er. I, Vol. 59,
p. 67
15

[14℄ Petersen, J. O., Takeuti, M., 2001: A Histori al Sket h of the Beat
Cepheids Studies. in S tellar P ulsation { N onlinear S tudies, eds.
M. Takeuti, D. D. Sasselov, Astrophys. S pa e S i. Library, Vol.
257, p. 1[15℄ Simon, N. R., 1982: A Plea for Reexamining Heavy Element Opa ities in Stars. Astrophys. J . (Letters), Vol. 260, L. 87[16℄ Moskalik, P., Bu hler, J. R., Marom, A., 1992: Toward a Resolutionof the Bump and Beat Cepheid Mass Dis repan y. Astrophys. J .,Vol. 385, p. 685[17℄ Al o k, C., Allsman, R. A., Axelrod, T. S., et al., 1995: The MACHO Proje t LMC Variable Star Inventory. I: Beat Cepheids - Conlusive Eviden e for the Ex itation of the Se ond Overtone in Classi al Cepheids. Astron. J ., Vol. 109, p. 1654
[18℄ Soszynski, I., Udalski, A., Szymanski, M., et al., 2000: The Optial Gravitational Lensing Experiment. Cepheids in the Magellani
Clouds. VI. Double-Mode Cepheids in the Large Magellani Cloud.
A ta Astron., Vol. 50, p. 451[19℄ Pardo, I., Poretti, E., 1997: The Gala ti Double-mode Cepheids.
I. Frequen y Analysis of the Light Curves and Comparison with
Single-mode Cepheids. Astron. Astrophys., Vol. 324, p. 121[20℄ Sziladi, K., Vinko, J., Poretti, E. et al., 2007: New Homogeneous
Iron Abundan es of Double-mode Cepheids from High-resolution
E hells Spe tros opy. Astron. Astrophys., Vol. 473, p. 579

16

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