论文标题
与Gaia DR3相比，二元系统的轨道视差和零点的零点抵消了明亮的幅度
Orbital parallax of binary systems compared to GAIA DR3 and the parallax zero-point offset at bright magnitudes
论文作者
论文摘要
（删节的）已知星体和光谱轨道的多个系统提供了直接确定与这些系统距离的独特可能性，而无需任何假设。因此，它们是比较Gaia数据版本3（GDR3）视差数据的理想对象，尤其是因为GDR3列出了非单个星星（NSS）分析的结果，从而可能导致可视性改善。 从文献中汇集了186个系统的192个轨道视差测定样本。恒星也有可能在宽二元系统中，发现了37个候选者。 NSS分析仅对21个对象提供信息，包括来自天体二进制管道的8个对象，与主目录中的物体相比，视差确实有了显着改善。似乎在NSS分析的预过滤阶段消除了样品中的大多数对象。 轨道视差和（最佳）\ g \视差最终获得了170个对象之间的差异。当消除轨道和\ g \视差之间具有较大视差误差或不切实际的较大差异的对象被消除，并且选择了GOF <100或<8的对象，则仍然保留68和20星的样品。 测试了计算PZPO的三种配方。应用这些校正后，其余的视差差异与所有三个配方的误差栏内正式一致。 使用轨道可视性的方法显示出可行的方法，但是由于NSS分析的改善视差仅适用于几乎没有系统，因此无法达到全部电位。在最终选择中，已知20颗恒星中的18个恒星的轨道相差超过5％。在完整的样本中，有148个物体达到此精度，因此，有望使用GDR4达到使用轨道可视性的全部潜力。
(abridged)Multiple systems for which the astrometric and spectroscopic orbit are known offer the unique possibility of determining the distance to these systems directly without any assumptions. They are therefore ideal objects for a comparison of Gaia data release 3 (GDR3) parallax data, especially since GDR3 presents the results of the non-single star (NSS) analysis that potentially results in improved parallaxes. An sample of 192 orbital parallax determinations for 186 systems is compiled from the literature. The stars are also potentially in wide binary systems, and 37 candidates were found. Only for 21 objects does the NSS analysis provide information, including 8 from the astrometric binary pipeline, for which the parallaxes do improve significantly compared to those in the main catalogue. It appears that most of the objects in the sample are eliminated in the pre-filtering stage of the NSS analysis. The difference between the orbital parallax and the (best) \G\ parallax was finally obtained for 170 objects. When objects with large parallax errors or unrealistically large differences between the orbital and \G\ parallaxes are eliminated, and objects with a GOF < 100 or <8 are selected, samples of 68 and 20 stars remain. Three recipes that calculate the PZPO are tested. After these corrections are applied the remaining parallax differences are formally consistent with zero within the error bar for all three recipes. The method of using orbital parallaxes is shown to work, but the full potential is not reached as an improved parallax from the NSS analysis is available for only few systems. In the final selection, the orbital parallax of 18 of 20 stars is known to better than 5%. In the full sample, 148 objects reach this precision and therefore the full potential of using orbital parallaxes may hopefully be reached with GDR4.
