On the period variations of several low declination high amplitude delta Scuti variables

On the period variations of several low declination high amplitude delta Scuti variables
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几个低赤纬高振幅δ Scuti变量的周期变化

DOI:
10.1007/s10509-010-0574-9
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发表时间:
2011-01
影响因子:
1.9
通讯作者:
Fu, J.N.
Fu, J.N.
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Boonyarak, C.;Khokhuntod, P.;Jiang, S.Y.;Fu, J.N.

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在1999年至2010年期间,利用泰国那瑞轩大学的一台16英寸的Schmidt-Cassegrain望远镜和中国几台配备CCD相机的类似大小的望远镜,观测了14颗高振幅delta型Scuti星:GP and、CY Aqr、BS Aqr、YZ Boo、AD CMi、VZ Cnc、EH Lib、DY Her、V927 Her、KZ Hya、BE Lyn、V1162 Ori、DY Peg和CW Ser。研究人员还从科学期刊和互联网上收集了这些变星的数据。然后根据观测结果确定或从文献中获得这些三角天蝎座恒星的最大光度时间,以分析脉动周期的变化。对于14颗三角星,我们得出了7颗星(BS Aqr, CY Aqr, AD CMi, EH Lib, KZ Hya, BE Lyn和DY Peg)是双星或多星系统。有10颗三角星的周期以每年5.86×10−9 ~ 2.34×10−6的速率增加,而另外4颗星(BS Aqr、DY Her、BE Lyn和DY Peg)的周期以每年10−9 ~ 10−8的速率减少。
A 16-inch Schmidt-Cassegrain telescope on the campus of Naresuan University of Thailand and several similar-size telescopes in China equipped with CCD cameras were used to observe 14 high amplitude delta Scuti stars: GP And, CY Aqr, BS Aqr, YZ Boo, AD CMi, VZ Cnc, EH Lib, DY Her, V927 Her, KZ Hya, BE Lyn, V1162 Ori, DY Peg, and CW Ser, between the years 1999 and 2010. Data were also collected from scientific journals and sources on the Internet for these variable stars. Times of light maximum of these delta Scuti stars were then either determined from the observations or obtained from the literature to analyze the pulsation period variations. For the 14 delta Scuti stars we concluded that 7 stars (BS Aqr, CY Aqr, AD CMi, EH Lib, KZ Hya, BE Lyn and DY Peg) are binary or multiple systems. 10 delta Scuti stars are found with periods increasing with rates between 5.86×10−9and 2.34×10−6per year and the other 4 stars (BS Aqr, DY Her, BE Lyn and DY Peg) show periods decreasing with rates of about 10−9to 10−8per year.
DOI: 10.1002/asna.19342531003
发表时间: 1934-11
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作者:
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发表时间: 2009-03
影响因子: 3.5
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