On the incidence of eclipsing Am binary systems in the SuperWASP survey
B. Smalley, J. Southworth, O. I. Pintado, M. Gillon, D. L. Holdsworth, D. R. Anderson, S. C. C. Barros, A. Collier Cameron, L. Delrez, F. Faedi, C. A. Haswell, … 展开作者
B. Smalley, J. Southworth, O. I. Pintado, M. Gillon, D. L. Holdsworth, D. R. Anderson, S. C. C. Barros, A. Collier Cameron, L. Delrez, F. Faedi, C. A. Haswell, C. Hellier, K. Horne, E. Jehin, P. F. L. Maxted, A. J. Norton, D. Pollacco, I. Skillen, A. M. S. Smith, R. G. West, P. J. Wheatley
备注：
12 pages, 9 figures, 6 tables. Accepted for publication in A&A. Owing to large size, multi-page Figure 10 containing all 66 light curves is not included. Full version can be downloaded from http://www.astro.keele.ac.uk/~bs/Wasp_Am_Binary.pdf
The results of a search for eclipsing Am star binaries using photometry from the SuperWASP survey are presented. The light curves of 1742 Am stars fainter than V = 8.0 were analysed for the presences of eclipses. A total of 70 stars were found to exhibit eclipses, with 66 having sufficient observations to enable orbital periods to be determined and 28 of which are newly identified eclipsing systems. Also presented are spectroscopic orbits for 5 of the systems. The number of systems and the period distribution is found to be consistent with that identified in previous radial velocity surveys of `classical' Am stars.
Period and period change measurements for 143 SuperWASP eclipsing binary candidates near the short-period limit and discovery of a doubly eclipsing quadruple system
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VII. V1200 Centauri: a bright triple in the Hyades moving group
通过对\textit{All Sky Automated Survey}（ASAS）和SuperWASP数据库的光谱观测和光变曲线的分析，给出了V1200~Centauri（ASAS~J135218-3837.3）的轨道和物理参数。利用互相关技术\textsc{todcor}，从OUC 50厘米望远镜和PUCHEROS摄谱仪以及1.2米欧拉望远镜和CORALIE摄谱仪获得的高分辨率光谱中计算了径向速度。我们发现系统的绝对参数为$M_1= 1.394\pm 0.030$ M $_\odot$，$M_2= 0.866\pm 0.015$ M $_\odot$，$R_1= 1.39\pm 0.15$ R $_\odot$，$R_2= 1.10\pm 0.25$ R $_\odot$ .我们研究了双星的演化状态和运动学，我们的结果表明V1200~Centauri可能是毕宿星移动群的成员，但大部分膨胀的次级半径可能表明该系统可能更年轻，大约3000万年。我们还发现，食对是由另一个恒星质量的物体在351天的轨道上运行的，这对于等级三元组来说是不寻常的短。这使得V1200 Cen成为测试多颗恒星形成模型的潜在目标。
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VI. AK Fornacis - a rare, bright K-type eclipsing binary
我们提出了一个明亮的（V=9.14），附近（d=31秒差距），晚型分离食二进制AK天炉座的光度和光谱分析相结合的结果。这个P=3.981 d的系统以前没有被认为是双线光谱双星，这是这个独特目标的第一个完整的物理模型。利用FEROS、CORALIE和HARPS摄谱仪，我们收集了一些高分辨率的光谱，以计算双星两个组成部分的径向速度。测量是用我们自己的解缠程序和TODCOR技术完成的，后来又与ASAS和SuperWASP档案中的光度法相结合。我们还使用Spectroscopy Made Easy（SME）软件包对组分光谱进行了大气分析。我们的分析表明，AK For由两个活跃的冷矮星组成，质量分别为$M_1=0.6958 \pm 0.0010$和$M_2=0.6355 \pm 0.0007$ M $_\odot$，半径分别为$R_1=0.687 \pm 0.020$和$R_2=0.609 \pm 0.016$ R $_\odot$，金属丰度略低于太阳。两个组件的参数都很好地再现了模型。AK For是已知的K型或M型食双星中最亮的系统。它的轨道周期是最长的之一，旋转速度是最低的之一，这使我们能够获得非常精确的径向速度测量。物理参数的精度，我们得到的地方AK的二进制文件中最好的质量测量在文献中。它还填补了我们对0.5-0.8 M $_\odot$范围内的恒星以及短周期和长周期系统的知识空白。所…
Variability and stellar pulsation incidence in Am/Fm stars using TESS and Gaia data
DTU Space, Technical University of Denmark（丹麦技术大学空间中心）；Astrophysics Group, Keele University（基尔大学天体物理组）；Centre for Astrophysics, University of Southern Queensland（南昆士兰大学天体物理中心）；Instytut Astronomiczny, Uniwersytet Wrocławski（弗罗茨瓦夫大学天文研究所）
