首页> 外文期刊>The Astrophysical journal >Binarity In Cool Asymptotic Giant Branch Stars: A Galex Search For Ultraviolet Excesses
【24h】

Binarity In Cool Asymptotic Giant Branch Stars: A Galex Search For Ultraviolet Excesses

机译:在凉爽的渐近巨型分支星中的二元性:紫外线过量的Galex搜索

获取原文
获取原文并翻译 | 示例
           

摘要

The search for binarity in AGB stars is of critical importance for our understanding of how planetary nebulae acquire the dazzling variety of aspherical shapes which characterizes this class. However, detecting binary companions in such stars has been severely hampered due to their extreme luminosities and pulsations. We have carried out a small imaging survey of AGB stars in ultraviolet light (using GALEX), where these cool objects are very faint, in order to search for hotter companions. We report the discovery of significant far-ultraviolet excesses toward nine of these stars. The far-ultraviolet excess most likely results either directly from the presence of a hot binary companion or indirectly from a hot accretion disk around the companion.
机译:寻找AGB恒星的双星性对于我们理解行星状星云如何获得代表该类特征的令人眼花variety乱的非球面形状至关重要。但是,由于它们极高的亮度和脉动,在此类恒星中检测双星伴星已受到严重阻碍。为了寻找更热的伴星,我们对紫外线(使用GALEX)对AGB恒星进行了小型成像调查(使用GALEX),这些较凉的物体非常暗淡。我们报告发现其中9颗星有明显的远紫外线超标现象。远紫外线过量很可能直接由热二进制伴侣的存在导致,或者间接地由伴侣周围的热吸积盘引起。

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