...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Photometric Investigation and Possible Light-Time Effect in the Orbital Period of a Marginal Contact System, CW Cassiopeiae
【24h】

Photometric Investigation and Possible Light-Time Effect in the Orbital Period of a Marginal Contact System, CW Cassiopeiae

机译：CW Cassiopeiae边缘接触系统在轨道周期内的光度研究和可能的光时效应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The first complete charge-coupleddevice (CCD) light curves in B and V passbands of a neglected contact binary system, CW Cassiopeiae (CW Cas), are presented. They were analyzed simultaneously by using the Wilson and Devinney (WD) code 0971, ApJ, 166, 605). The photometric solution indicates that CW Cas is a W-type W UMa system with a mass ratio of m_2/m_1 = 2.234, and that it is in a marginal contact state with a contact degree of ～6.5% and a relatively large temperature difference of ～327 K between its two components. Based on the minimum times collected from-the literature, together with the new ones obtained in this study, the orbital period changes of CW Cas were investigated in detail. It was found that a periodical variation overlaps with a secular period decrease in its orbital period. The long-term period decrease with a rate of dP/dt = -3.44 × 10~(-8)d yr~(-1) can be interpreted either by mass transfer from the more-massive component to the less-massive with a rate of dm_2/dt = -3.6 × 10~(-8) M_⊙yr~(-1), or by mass and angular-momentum losses through magnetic braking due to a magnetic stellar wind. A low-amplitude cyclic variation with a period of T = 63.7 yr might-be caused by the light-time effect due to the presence of a third body.
机译：给出了被忽略的接触二元系统CW Cassiopeiae（CW Cas）的B和V通带中的第一条完整的电荷耦合器件（CCD）光曲线。同时使用Wilson和Devinney（WD）代码0971，ApJ，166、605对它们进行了分析。光度法表明，CW Cas为质量比为m_2 / m_1 = 2.234的W型W UMa系统，处于边际接触状态，接触度为〜6.5％，温差较大。其两个分量之间约为327K。根据文献收集的最短时间，结合本研究获得的最短时间，详细研究了CW Cas的轨道周期变化。发现周期性变化与其轨道周期的世俗周期减小重叠。长期周期以dP / dt = -3.44×10〜（-8）d yr〜（-1）的速率下降，可以通过质量从较高质量的组分向较低质量的质量转移进行解释。 dm_2 / dt的比率= -3.6×10〜（-8）M_（yr〜（-1），或者是由于恒星风产生的磁制动引起的质量和角动量损失。由于第三体的存在，光时间效应可能导致周期为T = 63.7 yr的低振幅循环变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号