从KISOGP巡天中发现北银道面的双星星群
Eclipsing Binary Populations across the Northern Galactic Plane from the KISOGP survey
摘要：
我们提供了来自木曾宽视场相机密集银道巡天（KISOGP）的北银道面食双星目录。我们目视确认了分布在$\sim$ 330平方度范围内的7055颗食双星，包括4197颗大熊座W/EW-、1458颗$β$天琴座/EB-和1400颗大陵五/EA型食双星。对于所有系统，使用$I$带光变曲线获得准确的系统参数。从EW型天体的周期-光度关系出发，导出了它们的距离和消光值。我们还从食双星系统样本的分布中，结合高质量恒星形成区和造父变星示踪剂的分布，获得了薄盘的结构。我们发现，薄盘是不均匀的数密度作为银河经度的函数。使用这组新的距离示踪剂，我们约束薄磁盘的详细结构。最后，我们报告了一个全球视差零点偏移量的$ Δπ=-42.1\pm1.9\mbox{(stat.)}\pm12.9\mbox{(syst.)}$ $μ$之间，我们仔细校准EW型日食二进制位置和盖亚早期数据发布3提供的。执行官方推荐的视差零点校正可显著降低偏移。此外，我们提供了我们的EW型食双星的光度特征，可以应用于进一步的分析。
英文摘要：
We present a catalog of eclipsing binaries in the northern Galactic Plane from the Kiso Wide-Field Camera Intensive Survey of the Galactic Plane (KISOGP). We visually identified 7055 eclipsing binaries spread across $\sim$330 square degrees, including 4197 W Ursa Majoris/EW-, 1458 $β$ Lyrae/EB-, and 1400 Algol/EA-type eclipsing binaries. For all systems, $I$-band light curves were used to obtain accurate system parameters. We derived the distances and extinction values for the EW-type objects from their period--luminosity relation. We also obtained the structure of the thin disk from the distribution of our sample of eclipsing binary systems, combined with those of high-mass star-forming regions and Cepheid tracers. We found that the thin disk is inhomogeneous in number density as a function of Galactic longitude. Using this new set of distance tracers, we constrain the detailed structure of the thin disk. Finally, we report a global parallax zero-point offset of $ Δπ=-42.1\pm1.9\mbox{(stat.)}\pm12.9\mbox{(syst.)}$ $μ$as between our carefully calibrated EW-type eclipsing binary positions and those provided by Gaia Early Data Release 3. Implementation of the officially recommended parallax zero-point correction results in a significantly reduced offset. Additionally, we provide a photometric characterization of our EW-type eclipsing binaries that can be applied to further analyses.
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