arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0804.4139astro-ph
收藏

R Aqr的光谱轨道和几何结构

The spectroscopic orbit and the geometry of R Aqr

M. Gromadzki, J. Mikolajewska

摘要:

R Aqr是最接近的共生双星之一,也是唯一一个具有径向速度数据的D型系统,适合于轨道参数估计。我们研究的目的是得到一个可靠的光谱轨道的Mira组件,并建立之间的联系的轨道运动和其他现象所示的R Aqr。我们重新分析最近发表的速度数据McIntosh和Rustan补充额外的速度。我们发现了一个周期为43.6年的偏心轨道(e=0.25)。这个解决方案是在协议解决VLA观察这个系统。我们表明,最后1974-1981年增加消光对米拉发生在其优越的光谱连接,可以是由于在吸积流中的中性物质的遮蔽。我们还表明,喷流喷射与轨道位置无关。

英文摘要:

R Aqr is one of the closest symbiotic binaries and the only D-type system with radial velocity data suitable for orbital parameters estimation. The aims of our study are to derive a reliable spectroscopic orbit of the Mira component, and to establish connections between the orbital motion and other phenomena shown by R Aqr. We reanalize velocity data recently published by McIntosh & Rustan complemented by additional velocities. We find an eccentric orbit (e=0.25) with a period 43.6 yr. This solution is in agreement with a resolved VLA observation of this system. We demonstrate that the last 1974-1981 increase of extinction towards the Mira occured during its superior spectroscopic conjunction, and can be due to obscuration by a neutral material in the accreting stream. We also show that jet ejection is not connected with the orbital position.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑