Radii of LMC and SMC Cepheids

被引：1
|
作者：
Kanev, E. N. [1 ]
机构：
[1] Russian Acad Sci, Inst Astron, Moscow 119017, Russia
来源：
ASTRONOMISCHE NACHRICHTEN | 2013年 / 334卷 / 08期
关键词：
Cepheids; Magellanic Clouds; techniques: photometric; techniques: radial velocities; CLASSICAL CEPHEIDS; MAGELLANIC CLOUDS; DISTANCE SCALE; PHOTOMETRY; VELOCITIES;
D O I：
10.1002/asna.201311937
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We collected long sets of precise radial velocity observations of radial velocities for 8 SMC and 14 LMC Cepheids. Based on these series of radial velocity measurements and on multicolor photoelectric observations, we calculated radii of the program extragalactic Cepheids using a modification of Balona's method. Our main goal was to determine the long-period branch of the period-radius diagram and reveal a dependence on metallicity. We derived the following period-radius relation: log R = 1.06(+/- 0.03)+0.74(+/- 0.02) log P. We did not find any significant difference between the period-radius relation of extragalactic Cepheids and that of fundamental-mode galactic Cepheids. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
引用
收藏
页码：896 / 898
页数：3
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