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arXiv 2006.01467astro-ph.SR
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用盖亚观测到的SB2双星的质量。五、10颗双星的精确SB2轨道和5颗双星的质量

Masses of the components of SB2 binaries observed with Gaia. V. Accurate SB2 orbits for 10 binaries and masses of the components of 5 binaries

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

Jean-Louis Halbwachs, Flavien Kiefer, Yveline Lebreton, Henri M. J. Boffin, Frédéric Arenou, Jean-Baptiste Le Bouquin, Benoît Famaey, Dimitri Pourbaix, Patrick Guillout, Jean-Baptiste Salomon, Tsevi Mazeh

摘要:

双线分光双星(SB 2)是恒星质量的主要来源之一,因为额外的观测只需要给出轨道平面的倾角,就可以获得各个组成部分的质量。出于这个原因,我们正在使用上普罗旺斯天文台的SOPHIE摄谱仪观测一些SB 2,以精确确定它们的轨道要素。我们的目标是通过结合我们的径向速度(RV)测量和来自盖亚卫星的天体测量,最终获得精度为1%的质量。本文给出了10个SB 2的RV和重新确定的轨道。为了验证我们将从盖亚获得的质量,我们获得了其中一个SB 2的ESO VLTI的干涉测量。加上我们或其他人已经发表的对另外4颗恒星的干涉测量或散斑测量,我们最终得到了5颗双星的质量,质量在0.51 - 2.2太阳质量之间,包括主序星矮星和一些演化程度更高的恒星,它们在HR图中的位置已经得到了估计。

英文摘要:

Double-lined spectroscopic binaries (SB2s) are one of the main sources of stellar masses, as additional observations are only needed to give the inclinations of the orbital planes in order to obtain the individual masses of the components. For this reason, we are observing a selection of SB2s using the SOPHIE spectrograph at the Haute-Provence observatory in order to precisely determine their orbital elements. Our objective is to finally obtain masses with an accuracy of the order of one percent by combining our radial velocity (RV) measurements and the astrometric measurements that will come from the Gaia satellite. We present here the RVs and the re-determined orbits of 10 SB2s. In order to verify the masses we will derive from Gaia, we obtained interferometric measurements of the ESO VLTI for one of these SB2s. Adding the interferometric or speckle measurements already published by us or by others for 4 other stars, we finally obtain the masses of the components of 5 binary stars, with masses ranging from 0.51 to 2.2 solar masses, including main-sequence dwarfs and some more evolved stars whose location in the HR diagram has been estimated.

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