首页     开始     To Survive in the Universe    
Inhabited Sky
    News@Sky     天文图片     收集     论坛     Blog New!     常见问题     新闻     登录  

HD 85017


目录

图像

上传图像

DSS Images   Other Images


相关文章

A photometric study of the light variations of the triple system DG Leo
Multi-site and multi-year differential photometry of the triple star DGLeo reveals a complex frequency spectrum that can be modelled as thecombination of at least three δ Scuti type frequencies in therange 11.5-13 c/d (with semi-amplitudes of 2-7 mmag) and a superimposedslow variability of larger amplitude. The period of the slow variationfits very well with half the orbital period of the inner spectroscopicbinary indicating the presence of ellipsoidal variations caused by thetidally deformed components in a close configuration. These findings,together with the results of a recent spectroscopic analysis (showingthat the system consists of a pair of mild Am stars and one A-typecomponent of normal solar composition), infer that DG Leo is anextremely interesting asteroseismic target. Identification of whichcomponent(s) of this multiple system is (or are) pulsating anddetermination of the excited pulsation modes will both contribute to amuch better understanding of the non-trivial link between multiplicity,chemical composition, rotation, and pulsation in the lower part of theclassical Cepheid instability strip.

提交文章


相关链接

  • - 没有找到链接 -
提交链接


下列团体成员


观测天体数据

星座:獅子座
右阿森松:09h49m33.09s
赤纬:+20°47'38.7"
视星:7.741
距离:151.976 天文距离
右阿森松适当运动:-54.1
赤纬适当运动:-74.6
B-T magnitude:8.956
V-T magnitude:7.842

目录:
适当名称   (Edit)
HD 1989HD 85017
TYCHO-2 2000TYC 1417-315-1
USNO-A2.0USNO-A2 1050-06136437
HIPHIP 48197

→ 要求更多目录从vizier