THE MULTIPLICITY OF MASSIVE STARS: A HIGH ANGULAR RESOLUTION SURVEY WITH THE HST FINE GUIDANCE SENSOR
THE MULTIPLICITY OF MASSIVE STARS: A HIGH ANGULAR RESOLUTION SURVEY WITH THE HST FINE GUIDANCE SENSOR
复制标题
DOI：
10.1088/0004-6256/149/1/26
复制
发表时间：
2014-09
期刊：
影响因子：
--
通讯作者：
E. Aldoretta;E. Aldoretta;S. Caballero-Nieves;D. Gies;E. Nelan;Debra J. Wallace;W. Hartkopf;Todd J. Henry;W. Jao;J. M. Apell'aniz;Brian D. Mason;A. F. J. Moffat;R. Norris;Noel D Richardson;Stephen J. Williams
中科院分区：
文献类型：
--
作者：
E. Aldoretta;E. Aldoretta;S. Caballero-Nieves;D. Gies;E. Nelan;Debra J. Wallace;W. Hartkopf;Todd J. Henry;W. Jao;J. M. Apell'aniz;Brian D. Mason;A. F. J. Moffat;R. Norris;Noel D Richardson;Stephen J. Williams
我们介绍了用哈勃太空望远镜上的精密制导传感器在大质量恒星中寻找角分辨双星系统的全天空巡天结果。224颗恒星的样本主要由银河系O型和b型恒星以及明亮的蓝色变星组成，加上大麦哲伦星云中的一些明亮恒星。FGS TRANS模式观测对探测到角距在0。″01和1。″0，比△m = 5 ？>。FGS观测分辨了52个双星系统和6个三星系统，并在另外7个目标中探测到部分分辨的双星（其中43个是新探测到的）。这些数字产生了FGS调查的伴随检测频率为29%。我们还收集了样本中近光谱双星和宽天文双星的数量的文献结果，并提出了多系统的频率以及居住在星团和联合中的恒星子集，野星和逃逸星的伴星频率的估计。这些结果证实了高多重率，特别是在星团和星团中的大质量恒星中。我们证明了周期分布在log P ？>。我们确定了一些可能对长期轨道确定感兴趣的系统，并且我们注意到其中一些伴星对于解释具有第三伴星的近距离双星的径向速度和光曲线的重要性。
We present the results of an all-sky survey made with the Fine Guidance Sensor on the Hubble Space Telescope to search for angularly resolved binary systems among massive stars. The sample of 224 stars is comprised mainly of Galactic O- and B-type stars and luminous blue variables, plus a few luminous stars in the Large Magellanic Cloud. The FGS TRANS mode observations are sensitive to the detection of companions with an angular separation between 0.″01 and 1.″0 and brighter than △ m = 5 ?> . The FGS observations resolved 52 binary and 6 triple star systems and detected partially resolved binaries in 7 additional targets (43 of these are new detections). These numbers yield a companion detection frequency of 29% for the FGS survey. We also gathered literature results on the numbers of close spectroscopic binaries and wider astrometric binaries among the sample, and we present estimates of the frequency of multiple systems and the companion frequency for subsets of stars residing in clusters and associations, field stars, and runaway stars. These results confirm the high multiplicity fraction, especially among massive stars in clusters and associations. We show that the period distribution is approximately flat in increments of log P ?> . We identify a number of systems of potential interest for long-term orbital determinations, and we note the importance of some of these companions for the interpretation of the radial velocities and light curves of close binaries that have third companions.