arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.13706astro-ph.SRastro-ph.EP
收藏

来自SHINE调查的新二进制文件

New binaries from the SHINE survey

M. Bonavita, R. Gratton, S. Desidera, V. Squicciarini, V. D'Orazi, A. Zurlo, B. Biller, G. Chauvin, C. Fontanive, M. Janson, S. Messina, F. Menard, M. Meyer, A.… 展开作者

M. Bonavita, R. Gratton, S. Desidera, V. Squicciarini, V. D'Orazi, A. Zurlo, B. Biller, G. Chauvin, C. Fontanive, M. Janson, S. Messina, F. Menard, M. Meyer, A. Vigan, H. Avenhaus, R. Asensio Torres, J. -L. Beuzit, A. Boccaletti, M. Bonnefoy, W. Brandner, F. Cantalloube, A. Cheetham, M. Cudel, S. Daemgen, P. Delorme, C. Desgrange, C. Dominik, N. Engler, P. Feautrier, M. Feldt, R. Galicher, A. Garufi, D. Gasparri, C. Ginski, J. Girard, A. Grandjean, J. Hagelberg, Th. Henning, S. Hunziker, M. Kasper, M. Keppler, E. Lagadec, A. -M. Lagrange, M. Langlois, J. Lannier, C. Lazzoni, H. Le Coroller, R. Ligi, M. Lombart, A. -L. Maire, S. Mazevet, D. Mesa, D. Mouillet, C. Moutou, A. Muller, S. Peretti, C. Perrot, S. Petrus, A. Potier, J. Ramos, E. Rickman, D. Rouan, G. Salter, M. Samland, T. Schmidt, E. Sissa, T. Stolker, J. Szulagyil, S. Udry, F. Wildi

摘要:

我们提出了多个恒星系统内观察到的SpHere红外线调查外行星(SHINE)。SHINE使用高对比度成像寻找年轻恒星的亚恒星同伴。虽然在SPHERE视野内(<5.5弧秒)有已知伴星的恒星被从原始目标列表中删除,但我们发现了迄今为止观察到的463个SHINE目标中的78个的额外伴星。27%的系统有三个或更多组件。鉴于样本在观察条件和策略方面的异质性,使用定制的例程进行数据简化和分析,其中一些例程是专门为这些数据集设计的。然后,我们将SPHERE数据与文献和档案数据,TESS光变曲线和盖亚松弛和自行相结合,以尽可能完整地描述这些系统。结合所有数据,我们能够限制25个系统的轨道。我们仔细评估了分离范围为50-500 mas(周期范围为几年-几十年)的样本的完整性,考虑到初始选择偏倚,并恢复了因其多重性而从原始列表中排除的部分系统。这使我们能够将我们的样本的二进制频率与以前的研究进行比较,并突出质量比和周期分布的一些有趣趋势。我们还发现,对于少数对象,这种估计是可能的,从动力学参数得出的质量值与模型预测吻合得很好。对于有足够数据的12颗恒星来说,恒星和轨道的自旋似乎相当一致,这有利于磁盘碎片的起源。我们的研究结果强调了在处理二进制文件的形成等复杂问题时,结合不同技术的重要性,并展示了大样本对多个目的的有用性。

英文摘要:

We present the multiple stellar systems observed within the SpHere INfrared survey for Exoplanet (SHINE). SHINE searched for substellar companions to young stars using high contrast imaging. Although stars with known stellar companions within SPHERE field of view (<5.5 arcsec) were removed from the original target list, we detected additional stellar companions to 78 of the 463 SHINE targets observed so far. 27% of the systems have three or more components. Given the heterogeneity of the sample in terms of observing conditions and strategy, tailored routines were used for data reduction and analysis, some of which were specifically designed for these data sets. We then combined SPHERE data with literature and archival ones, TESS light curves and Gaia parallaxes and proper motions, to characterise these systems as completely as possible. Combining all data, we were able to constrain the orbits of 25 systems. We carefully assessed the completeness of our sample for the separation range 50-500 mas (period range a few years - a few tens of years), taking into account the initial selection biases and recovering part of the systems excluded from the original list due to their multiplicity. This allowed us to compare the binary frequency for our sample with previous studies and highlight some interesting trends in the mass ratio and period distribution. We also found that, for the few objects for which such estimate was possible, the values of the masses derived from dynamical arguments were in good agreement with the model predictions. Stellar and orbital spins appear fairly well aligned for the 12 stars having enough data, which favour a disk fragmentation origin. Our results highlight the importance of combining different techniques when tackling complex problems such as the formation of binaries and show how large samples can be useful for more than one purpose.

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。

↑