论文标题
GAIA数据版本3。天文二进制星星处理
Gaia Data Release 3. Astrometric binary star processing
论文作者
论文摘要
上下文。Gaia早期数据版本3包含15亿个来源的位置，视差和适当的动作，其中有些人不太适合“单星”模型。二进制是原因的原因之一。目标。选择了四百万个恒星，并测试了各种模型以检测二进制恒星并得出其参数。方法。使用初步处理来丢弃部分解决的双星星，并纠正透视加速度的过渡。然后，研究了测量值是否与有或没有混蛋的加速模型非常适合。当任何加速模型的拟合度超出我们的接受标准时，尝试了轨道模型。当恒星具有光度法变量时，还尝试了变异性诱导的动摇（VIM）模型。为了保持可能与恒星的真实本质相对应的解决方案，已经进行了最终选择。结果。最后，保留了338,215个加速溶液，约165,500个轨道溶液和869个VIM溶液。此外，在附录中给出了用于计算坎贝尔轨道元素不确定性的公式。
Context.The Gaia Early Data Release 3 contained the positions, parallaxes and proper motions of 1.5 billion sources, among which some did not fit well the "single star" model. Binarity is one of the causes of this. Aims. Four million of these stars were selected and various models were tested to detect binary stars and to derive their parameters. Methods. A preliminary treatment was used to discard the partially resolved double stars and to correct the transits for perspective acceleration. It was then investigated whether the measurements fit well with an acceleration model with or without jerk. The orbital model was tried when the fit of any acceleration model was beyond our acceptance criteria. A Variability-Induced Mover (VIM) model was also tried when the star was photometrically variable. A final selection has been made in order to keep only solutions that probably correspond to the real nature of the stars. Results. At the end, 338,215 acceleration solutions, about 165,500 orbital solutions and 869 VIM solutions were retained. In addition, formulae for calculating the uncertainties of the Campbell orbital elements from orbital solutions expressed in Thiele-Innes elements are given in an appendix.
