The early-type multiple system QZ Carinae
The early-type multiple system QZ Carinae
复制标题
DOI：
10.1051/0004-6361:20000228
复制
发表时间：
2001-02
影响因子：
6.5
通讯作者：
P. Mayer;R. Lorenz;H. Drechsel;A. Abseim
中科院分区：
文献类型：
--
作者：
P. Mayer;R. Lorenz;H. Drechsel;A. Abseim
我们提出了一个分析的早期型四星系统QZ车，包括一个食和非食的二进制。光谱研究是基于新的高色散阶梯光栅和CAT/CES谱的H和He线。非食双星轨道的元素可以被修正。在近正交光谱中检测到食双星较亮部分的线，而较暗部分的签名只能在少数光谱中识别。线的主要组成部分的非食对和两个组成部分的食对被发现是可变的位置和强度，特别是，He ii 4686发射线的较亮的食组件是强烈的变化。本文导出了目前有效的食双星QZ Car的星历表。Min. = hel. JD $2448687.16 + 5\fd9991 \cdot E$。讨论了多重系统中两个双星的相对轨道。与早期的调查相比，我们发现径向速度的变化，这两个双星系统的速度，这是用来-连同O-C分析预期的光-时间效应-推导出近似参数的相互轨道的两对。结果表明，这一轨道和距离QZ车可以进一步细化的最小定时和干涉。
We present an analysis of the early-type quadruple system QZ Car, consisting of an eclipsing and a non-eclipsing binary. The spectroscopic investigation is based on new high dispersion echelle and CAT/CES spectra of H and He lines. The elements for the orbit of the non-eclipsing pair could be refined. Lines of the brighter component of the eclipsing binary were detected in near-quadrature spectra, while signatures of the fainter component could be identified in only few spectra. Lines of the primary component of the non-eclipsing pair and of both components of the eclipsing pair were found to be variable in position and strength; in particular, the He ii 4686 emission line of the brighter eclipsing component is strongly variable. An ephemeris for the eclipsing binary QZ Car valid at present was derived Prim. Min. = hel. JD $2448687.16 + 5\fd9991 \cdot E$. The relative orbit of the two binary constituents of the multiple system is discussed. In contrast to earlier investigations we found radial velocity changes of the systemic velocities of both binaries, which were used -together with an O-C analysis of the expected light-time effect -to derive approximate parameters of the mutual orbit of the two pairs. It is shown that this orbit and the distance to QZ Car can be further refined by minima timing and interferometry.