The YMDB catalog: Young massive detached binaries for the determination of high-precision absolute stellar parameters
Pablo Martín-Ravelo, Roberto Gamen, Julia I. Arias, André-Nicolas Chené, Rodolfo H. Barbá
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18 pages, 13 figures, 4 tables. Accepted for publication in A&A. Light curves time series and the extended version of Table 2,3,4 will be available on CDS
Massive stars play a crucial role in the cosmic dynamics and chemical evolution of galaxies, however our understanding of their evolution and properties remains limited. An accurate determination of stellar parameters is essential for advancing our knowledge. Detached eclipsing binaries (DEBs) are particularly valuable for these determinations due to the minimal interaction between their stellar components, allowing for precise measurements. This study introduces the Young Massive Detached Binary (YMDB) catalog, designed to address the gap in the high-precision absolute parameter determination for young massive stars. By focusing on DEBs within the spectral range O9-B1, this catalog seeks to provide a reliable database for future studies and improve our understanding of massive star evolution. We conducted a photometric analysis of 87 young massive stars in DEBs using TESS light curves (LCs) that were processed through a custom pipeline. This analysis involved determining the amplitude of magnitude variations, orbital periods, times of minima, eccentricities, and the presence of apsidal motion and heartbeat phenomena. A thorough literature review was performed to obtain MK spectral classifications. We performed our own spectral classification of 19 systems to support the sample where a new classification was lacking or inconclusive. The analysis identified 20 previously unreported binary systems, with 13 newly recognized as variables. Among the 87 stars examined, 30 are confirmed as YMDB members, and 25 are candidates pending spectral classification. The remaining 32 stars belong to unsuitable spectral types or nondetached binary nature. Notable findings include the identification of new LC classifications, eccentricities in 13 systems, and heartbeat phenomena in several targets. The YMDB catalog offers a resource of high-quality LCs and reliable stellar classifications.
Mass-transfer properties of overcontact systems in the Kepler eclipsing binary catalog
我们从开普勒食双星目录中选择了质量转移双星候选者,并研究了质量转移速率对几个天体物理量的依赖性,包括轨道周期,半长轴,质量比,填充因子,温度和质量。我们选择这些候选人使用$O-C$图和计算它们的传质速率。初级质量是从质量-温度关系中获得的,组成星的温度是从克卜勒食联星的温度目录中提取的。过度接触系统的质量传递速率与天体物理量的关系似乎与半分离或分离系统的不同。这些关联表明,随着质量交换的发展,从质量较大的组分到质量较小的组分(从质量较小的组分到质量较大的组分)的质量交换通常会变得快速(缓慢)。然而,对于质量从大到小的组分的质量交换,这种趋势对于具有短周期($P<0.4$ d)和低质量($M_1<1.2$ M $_\odot$)的双星是不合理的,因为这些双星的相关性与具有长周期和高质量的双星相反。这些不同的相关性可能是由WUMa系统的亚型之间的相关性差异引起的(即,W型和A型)。或者,当质量比反转后,质量从大到小的组分再次发生质量交换时,其性质可能与第一次质量交换的性质不同。
The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. X. Enigmatic Class of Double Periodic Variables in the Large Magellanic Cloud
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - V. Investigation of subgiants and giants: the case of ASAS J010538-8003.7, ASAS J182510-2435.5, and V1980 Sgr
A New Methodology for Classifying Eclipsing Binaries with Kepler Data and Deep Learning
University of Hertfordshire(赫特福德大学);Centro de Astrobiología (CAB), CSIC-INTA(天体生物学中心(CAB),CSIC-INTA);Universidad Militar Nueva Granada(新格兰纳达军事大学);Universidad Autónoma de Madrid(马德里自治大学)
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 ASAS catalogue -- II. Two spotted M < 1 M$_\odot$ systems at different evolutionary stages
目标。我们提出了我们的详细的光谱和光度分析的结果,以前未知的< 1 M{_ \sun }分离食双星:ASAS J 045304 -0700.4和ASAS J 082552 -1622.8。方法.利用Keck-I望远镜上的高分辨率Echelle光谱仪(HIRES),我们获得了两个物体的光谱,覆盖了系统轨道的大部分。我们还获得了V和I波段测光与1.0米伊丽莎白望远镜的南非天文台(SAAO)。用PHOEBE和JKTEBOP程序计算了系统的轨道参数和物理参数。我们调查了这两个双星的演化状态与几套广泛使用的等时线。结果我们的模拟表明:(1)ASAS J 045304 -0700.4是一个古老的、贫金属的、活跃的系统,其组分质量为M1 = 0.8452 \pm 0.0056 M $_\odot$,M2 = 0.8390 \pm 0.0056 M $_\odot$,R1 = 0.848 \pm 0.005 R $_\odot$,R2 = 0.833 \pm 0.005 R $_\odot$,这使它处于主序星演化的末端--这是一个很少观察到的恒星演化阶段。(2)ASAS J 082552 -1622.8是一种富含金属,活动双星,成分质量为M1 = 0.703 \pm 0.003 M $_\odot$,M2 = 0.687 \pm 0.003 M $_\odot$和R1的半径= 0.694(+0.0…
Precise and Accurate Mass and Radius Measurements of Thirty Galactic Metal-Poor Stars in Detached Eclipsing Binaries
University of California, Berkeley(加州大学伯克利分校);The Ohio State University(俄亥俄州立大学);Center for Cosmology and Astroparticle Physics, The Ohio State University(俄亥俄州立大学宇宙学与天体粒子物理中心);California Institute of Technology(加州理工学院);Leibniz-Institut for Astrophysics Potsdam (AIP)(波茨坦莱布尼茨天体物理研究所);Tufts University(塔夫茨大学)
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…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- I. A sample of systems with components' masses between 1 and 2 M$_\odot$
我们从\emph{All Sky Automated Survey}(ASAS)数据库中获得的18个样本的绝对物理和轨道参数的测光和我们自己的径向速度测量的基础上。径向速度(RV)的计算使用的光谱,我们收集了3.9米的英澳望远镜和\emph{University College London Echelle Spectrograph}和1.9米的SAAO拉德克利夫望远镜和它的\emph{Grating Instrument for Radiation Analysis with a Fibre Fed Echelle}。为了获得尽可能精确的RV,大多数系统都使用AAT/UCLES的碘池进行观察和/或使用二维互相关技术(TODCOR)进行分析。使用合成模板光谱作为参考,用TODCOR测量RV。然而,对于两个对象,我们使用我们自己的方法的层析分离的二进制光谱提供观察到的模板光谱的RV测量,并提高RV精度甚至更多。对于这些二进制之一,AI苯丙氨酸,我们能够获得的轨道解的RV $rms$为62和24 m s $^{-1}$的小学和中学分别。对于该系统,$M \sin^3{i}$的精密度为0.08%。为了进行分析,我们使用了ASAS数据库中可用的光度法。利用PHOEBE和JKTEBOP程序将RV曲线和光变曲线结合起来,得到了系统的绝对物理参数。有了精确的RV,我们在几种情况下能够在质量上达到…
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - X. Three high-contrast systems with secondaries detected with IR spectroscopy
A Massive Magnetic Helium Atmosphere White Dwarf Binary in a Young Star Cluster
我们已经在盖亚DR 2目录中搜索了年轻疏散星团方向上以前未知的热白矮星。这个实验的目的是尝试将初始-最终质量关系(IFMR)扩展到更高的质量,可能提供一个与目前认为大约1.38 M $_{\odot}$的拉塞卡极限的张力。我们在年轻的$\sim$星系团Messier 47(NGC 2422)的方向上发现了一颗特别有趣的白矮星。所有的盖亚指标(自行、视差、在盖亚颜色星等图中的位置)都表明它是星团的成员。它的光谱,从双子座南部获得,产生了一些异常:它是一个DB(富氦大气)白矮星,它有很大的磁场(2.5 MG),质量高($\sim$ 1.06 M $_\odot$),它的颜色非常特殊-特别是红色的($r$,$i$,$z$和$y$),这表明它有一个晚型伴星。这是唯一的磁化,分离的双星白矮星与任何已知的光谱类型的星团内或星团外的非简并伴星。如果白矮星是星团的一员,正如所有指标所显示的那样,它的前身质量略高于6 M $_\odot$。然而,它可能讲述了一个比IFMR更有趣的故事,一个关于恒星磁场,I型超新星和来自低质量恒星系统的引力波的起源。
Dynamically derived morphology from the recurrence patterns of close binary stars using Kepler data
Inter University Centre for Astronomy and Astrophysics(大学间天文学与天体物理中心);Ramniranjan Jhunjhunwala College(拉姆尼兰詹·朱恩朱纳瓦拉学院);University of Aberdeen, King’s College(阿伯丁大学国王学院);Indian Institute of Science Education and Research Thiruvananthapuram(印度科学教育与研究学院特里凡得琅分校)
Accurate stellar parameters and distance to two evolved eclipsing binary systems, OGLE-BLG-ECL-123903 and OGLE-BLG-ECL-296596, towards the Galactic bulge
Morphological classification of eclipsing binary stars using computer vision methods
Institute of Physics, Faculty of Science, Pavol Jozef S af\'arik University in Ko s ice, Park Angelinum 9, 040 01 Ko s ice, Slovakia;Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia;Astronomical Institute, Czech Academy of Sciences, Fri c ova 298, 25 165 Ond r ejov, Czech Republic