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arXiv 1710.02017astro-ph.SR
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“SB2组件的精确质量”程序

The programme "accurate masses for SB2 components"

Jean-Louis Halbwachs, Frédéric Arenou, Henri M. J. Boffin, Benoît Famaey, Alain Jorissen, Flavien Kiefer, Jean-Baptiste Le Bouquin, Dimitri Pourbaix, Patrick Gu… 展开作者

Jean-Louis Halbwachs, Frédéric Arenou, Henri M. J. Boffin, Benoît Famaey, Alain Jorissen, Flavien Kiefer, Jean-Baptiste Le Bouquin, Dimitri Pourbaix, Patrick Guillout, Rodrigo Ibata, Yveline Lebreton, Tsevi Mazeh, Ada Nebot Gomez-Moran, Lev Tal-Or

摘要:

为了提高我们对恒星内部的理解,需要精确的恒星质量,但它们仍然相当罕见。幸运的是,即将到来的盖亚任务将提供天体测量,允许推导出附近双星的轨道倾角,这些双星也被地面望远镜观测为双线光谱双星(SB 2)。2010年,利用上普罗旺斯天文台的索菲摄谱仪启动了一个径向速度测量方案,以得出大量恒星的精确SB 2轨道。因此,由于Gaia,将导出组合的SB 2+天体测量轨道,预计两个分量的质量误差在1~ 1%左右。该方案包括70个SB 2,其中24个SB 2的精确轨道已经推导出来。此外,还分别利用HERMES和CARMENES摄谱仪启动了两个专门研究南方星或晚型矮星的补充方案。7个SB 2的干涉测量是用VLTI/PIONIER获得的,另外4个是从其他来源获得的。目前,组合的“视觉二进制”(VB)+SB 2的解决方案,推导出7个二进制,导致质量的组件和的反星系。依巴谷2号星表中的视差进行了轨道运动校正,并与我们的解决方案进行了比较,证实了依巴谷2号的高质量。

英文摘要:

Accurate stellar masses are requested in order to improve our understanding of stellar interiors, but they are still rather rare. Fortunately, the forthcoming Gaia Mission will provide astrometric measurements permitting the derivation of the orbital inclinations of nearby binaries which are also observed as double-lined spectroscopic binaries (SB2s) with ground-based telescopes. A programme of radial velocity (RV) measurements was initiated in 2010 with the Sophie spectrograph of the Haute-Provence observatory in order to derive accurate SB2 orbits for a large set of stars. Therefore, combined SB2+astrometric orbits will be derived thanks to Gaia, and masses with errors around 1~\% are expected for both components. The programme includes 70 SB2s, and the accurate SB2 orbits of 24 of them were already derived. In addition, two complementary programmes devoted to southern stars or to late-type dwarf stars were also initiated with the HERMES and the CARMENES spectrographs, respectively. Interferometric measurements were obained with the VLTI/PIONIER for 7 SB2s, and were taken from other sources for 4 others. Currently, combined "visual binary" (VB) +SB2 solutions were derived for 7 binaries, leading to the masses of the components and to the parallaxes. The parallaxes from the Hipparcos 2 catalogue were corrected for orbital motion and compared to our solution, confirming the high quality of Hipparcos 2.

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。

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