Interferometric Observations of the Hierarchical Triple System Algol
Sz. Csizmadia, T. Borkovits, Zs. Paragi, P. Abraham, L. Szabados, L. Mosoni, L. Sturmann, J. Sturmann, C. Farrington, H. A. McAlister, T. A. ten Brummelaar, N. … 展开作者
Sz. Csizmadia, T. Borkovits, Zs. Paragi, P. Abraham, L. Szabados, L. Mosoni, L. Sturmann, J. Sturmann, C. Farrington, H. A. McAlister, T. A. ten Brummelaar, N. H. Turner, P. Klagyivik
备注:
ApJ, in press. This is the accepted version; will be changed with the final version later (minor language corrections)
Algol is a triple stellar system consisting of a close semidetached binary orbited by a third object. Due to the disputed spatial orientation of the close pair, the third body perturbation of this pair is a subject of much research. In this study, we determine the spatial orientation of the close pair orbital plane using the CHARA Array, a six-element optical/IR interferometer located on Mount Wilson, and state-of-the-art e-EVN interferometric techniques. We find that the longitude of the line of nodes for the close pair is $Ω_1=48\degr\pm2\degr$ and the mutual inclination of the orbital planes of the close and the wide pairs is $95\degr\pm3\degr$. This latter value differs by $5\degr$ from the formerly known $100\degr$ which would imply a very fast inclination variation of the system, not borne out by the photometric observations. We also investigated the dynamics of the system with numerical integration of the equations of motions using our result as an initial condition. We found large variations in the inclination of the close pair (its amplitude $\sim 170\degr$) with a period of about 20 millennia. This result is in good agreement with the photometrically observed change of amplitude in Algol's primary minimum.
Spatially resolved mid-infrared observations of the triple system T Tauri
为了提高我们的知识的特点和分布的拱星尘埃与年轻的层次三重系统T头的各个组成部分,在N-波段的观测与VLTI进行。我们的研究是基于干涉和分光光度测量,并辅以新的视觉和红外光度。此外,相位进行了研究,以确定在近南双星中占主导地位的中红外光源。这些数据是在一个复杂的物理磁盘模型的帮助下拟合的。该模型利用基于蒙特卡罗方法的辐射转移代码MC 3D。在系统的所有三个组件周围都发现了扩展的中红外发射。同时配合测光和干涉测量数据证实了一个几乎面对拱盘周围的T头N的图片。朝向这颗恒星,在发射中可以看到硅酸盐带。这个发射特征被用来模拟星周盘的尘埃含量。在T Tau S附近,在吸收中可以看到硅酸盐带。这种吸收对红外伴星T Tau Sa非常明显,这可以从两个南部分量的第一个单独的N带光谱中看出。我们的配合支持以前的建议,一个几乎边缘上的光盘是目前围绕T头萨。因此,这个圆盘相对于T Tau N周围的拱星圆盘没有对准。干涉测量数据表明,磁盘T头萨周围是面向南北方向,这有利于这个源作为发射场的东西射流。我们进一步确定从干涉数据的相对位置的组件的南方二进制。
Southern Massive Stars at High Angular Resolution (SMaSH+): Properties of hierarchical massive triples
KU Leuven(荷语鲁汶大学);Universität zu Köln(科隆大学);Leuven Gravity Institute, KU Leuven(荷语鲁汶大学引力研究所);European Southern Observatory(欧洲南方天文台);naXys Research Institute, Department of Mathematics, University of Namur(纳穆尔大学数学系naXys研究所);Royal Observatory of Belgium(比利时皇家天文台);Anton Pannekoek Institute for Astronomy, University of Amsterdam(阿姆斯特丹大学安东·潘内克天文研究所);GRAPPA, University of Amsterdam(阿姆斯特丹大学GRAPPA研究中心);Centro de Astrobiología (CAB), CSIC-INTA(西班牙国家航天技术研究所/西班牙国家科学研究委员会天体生物学中心)
Southern massive stars at high angular resolution: WR 25 is a massive hierarchical triple system
KU Leuven(荷语鲁汶大学);Leuven Gravity Institute, KU Leuven(荷语鲁汶大学引力研究所);Royal Observatory of Belgium(比利时皇家天文台);European Southern Observatory(欧洲南方天文台);The CHARA Array of Georgia State University(佐治亚州立大学CHARA阵列);Institut de Planétologie et d’Astrophysique de Grenoble(格勒诺布尔行星学与天体物理学研究所);Tel Aviv University(特拉维夫大学)
$δ$ Circini: A massive hierarchical triple system with an eclipsing binary
Astronomical Institute of Charles University, Faculty of Mathematics and Physics(查理大学天文研究所,数学物理学院);European Organisation for Astronomical Research in the Southern Hemisphere (ESO)(欧洲南方天文台);Department of Physics and Astronomy, University of North Carolina at Chapel Hill(北卡罗来纳大学教堂山分校物理与天文学系);FZU - Institute of Physics of the Czech Academy of Sciences(捷克科学院物理研究所);Variable Star and Exoplanet Section of the Czech Astronomical Society(捷克天文学会变星与系外行星部门)
MATISSE unveils a dusty disc in the interior of EP Aquarii. First evidence of a misaligned hierarchical triple system with a central AGB star?
Centro de Astrobiología, CSIC-INTA(天体生物学中心,CSIC-INTA);Escuela de Doctorado UAM, Centro de Estudios de Posgrado, Universidad Autónoma de Madrid(马德里自治大学博士学院,研究生研究中心);European Southern Observatory(欧洲南方天文台);Dept. de Astrofísica Molecular, Instituto de Física Fundamental, IFF-CSIC(分子天体物理系,基础物理研究所,IFF-CSIC);Department of Physics and Astronomy, Chalmers University of Technology(查尔姆斯理工大学物理与天文系);Institute of Astronomy and Astrophysics, Université libre de Bruxelles(布鲁塞尔自由大学天文学与天体物理研究所);Department of Astrophysics, University of Vienna(维也纳大学天体物理系);Center for High Angular Resolution Astronomy, Georgia State University(佐治亚州立大学高分辨率天体物理中心)
Hidden massive eclipsing binaries in red supergiant systems: The hierarchical triple system KQ Puppis and other candidates
Masaryk University(马萨里克大学);European Southern Observatory (ESO)(欧洲南方天文台);Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences(孔科利天文台,匈牙利研究与创新科学院地球科学与天文学研究中心);Eötvös Loránd University(罗兰大学);Argelander-Institut für Astronomie(阿尔根德天体物理研究所);Yunnan Observatories, Chinese Academy of Sciences (CAS)(中国科学院云南天文台)