Infrared observations of the star R Cas

被引:5
作者
Nadzhip, AÉ
Tatarnikov, AM
Shenavrin, VI
Weigelt, G
Yudin, BF
机构
[1] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119899, Russia
[2] Max Planck Inst Radioastron, D-53121 Bonn, Germany
来源
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2001年 / 27卷 / 05期
关键词
stars; variable and peculiar;
D O I
10.1134/1.1368702
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present our JHKLM photometry for R Cas performed during 1988-2000. The pulsation period of R Cas is P approximate to 429.(d)6, with the maximum IR brightness lagging behind the maximum visual brightness by similar to0.2 P. The amplitude of light variations appreciably decreases with increasing wavelength at lambda < 3 mum. At lambda > 3 mum, this decrease virtually ceases. There is a step on the ascending branch of IR JHK brightness. The K-L color index increases linearly with K magnitude: K-L = 0.304K + 1.(m)20. The color temperature dependence, TK-L = f(K), is also linear: TK-L = -622K + 1100 K. In going from minimum to maximum, the K flux (as well as the bolometric flux) from the star and its color temperature TK-L increase by a factor of similar to2.2 and similar to1.3, respectively. (C) 2001 MAIK "Nauka/ Interperiodica".
引用
收藏
页码:324 / 327
页数:4
相关论文
共 7 条
[1]  
FLEISCHER AJ, 1992, ASTRON ASTROPHYS, V266, P321
[2]  
Hofmann KH, 2000, ASTRON ASTROPHYS, V353, P1016
[3]  
Isles J. E., 1989, Journal of the British Astronomical Association, V99, P121
[4]  
KHOLOPOV P, 1985, GEN CATALOGUE VARIAB, V1, P236
[5]   LIGHT CURVES OF MIRA VARIABLES AT 1.04 MICRONS [J].
LOCKWOOD, GW ;
WING, RF .
ASTROPHYSICAL JOURNAL, 1971, 169 (01) :63-&
[6]  
Nadzhip A. E., 1986, T GOS ASTRON I PK SH, V58, P119
[7]  
WEIGELT G, 2000, COMMUNICATION