The EC 14026 stars - IX. KPD 2109+4401

被引:37
作者
Koen, C
机构
[1] S African Astron Observ, ZA-7935 Observatory, South Africa
[2] Univ Texas, Dept Astron, Austin, TX 78712 USA
关键词
stars : individual : KPD 2109+4401; stars : oscillations; stars : variables : other;
D O I
10.1046/j.1365-8711.1998.01933.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The results of 37 h of high-speed photometry of KPD 2109+4401 are described. At least five periodicities in the range 182-198s are consistently present in the observations, with amplitudes in the range 1-6 mmag. Results of simultaneous multicolour high-speed photometry with the Stiening photometer are also presented; these data could in principle be used for mode identification of the periodicities. The results of a preliminary study suggest that the pulsations may all be l = 1 and 2 modes. Properties of the star are compared with those of the other EC 14026 stars.
引用
收藏
页码:567 / 572
页数:6
相关论文
共 25 条
[1]   STUDIES OF HOT-B SUBDWARFS .1. STROMGREN PHOTOMETRY OF THE GREENSTEIN-SARGENT-SAMPLE [J].
BERGERON, P ;
FONTAINE, G ;
LACOMBE, P ;
WESEMAEL, F ;
CRAWFORD, DL ;
JAKOBSEN, AM .
ASTRONOMICAL JOURNAL, 1984, 89 (03) :374-378
[2]  
BIXLER JV, 1991, ASTRON ASTROPHYS, V250, P370
[3]  
Breger M, 1997, ASTRON ASTROPHYS, V324, P566
[4]   The potential of asteroseismology for hot, subdwarf B stars: A new class of pulsating stars? [J].
Charpinet, S ;
Fontaine, G ;
Brassard, P ;
Dorman, B .
ASTROPHYSICAL JOURNAL, 1996, 471 (02) :L103-L106
[5]  
CUGIER H, 1994, ASTRON ASTROPHYS, V291, P143
[6]   THE KPD SURVEY FOR GALACTIC PLANE ULTRAVIOLET-EXCESS OBJECTS - SPACE DENSITIES OF WHITE-DWARFS AND SUBDWARFS [J].
DOWNES, RA .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1986, 61 (03) :569-584
[7]  
GARRIDO R, 1990, ASTRON ASTROPHYS, V234, P262
[8]   2-STAR HIGH-SPEED PHOTOMETRY [J].
GRAUER, AD ;
BOND, HE .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1981, 93 (553) :388-396
[9]   NATURE OF FAINT BLUE STARS IN HALO .2. [J].
GREENSTEIN, JL ;
SARGENT, AI .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1974, 28 :157-209
[10]   ECLIPSE MAPS OF THE ACCRETION DISK IN RW TRIANGULI [J].
HORNE, K ;
STIENING, RF .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1985, 216 (04) :933-948