E-BOSS: an Extensive stellar BOw Shock Survey - I. Methods and first catalogue
E-BOSS: an Extensive stellar BOw Shock Survey - I. Methods and first catalogue
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E-BOSS：广泛的恒星 BOw 冲击调查 - I. 方法和第一个目录
DOI：
10.1051/0004-6361/201118116
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发表时间：
2011
影响因子：
6.5
通讯作者：
N. Isequilla
中科院分区：
文献类型：
--
作者：
C. S. Peri;C. S. Peri;P. Benaglia;P. Benaglia;D. P. Brookes;I. R. Stevens;N. Isequilla
上下文。弓形激波是由许多存在冲击波的天体产生的。由失控恒星产生的恒星弓激波以前曾被少量探测到，并得到了很好的研究。随着模型开发的进展和观测仪器的改进，我们对这些物体产生的排放及其来源的了解现在可以更清楚地了解。目标。通过应用统一的搜索标准和系统的搜索过程，我们生成了恒星弓激波星表。这个星表是统计研究的起点，帮助我们解决基本问题，例如，在什么条件下可以检测到恒星弓激波。方法：研究方法。通过使用最新发布的红外数据，我们对早期类型的逃逸恒星产生的弓形激波进行了搜索。我们首先探索了一组已知的IRA弓形激波候选者是否在最新的可用IR数据中可见，这些数据具有更高的分辨率和灵敏度。然后，我们从最新的大型逃逸星表中挑选了一批失控恒星。在这第一次发布中，我们聚焦于OB恒星，并在这些恒星附近搜索弓形特征。结果。我们提供了一个弓激波候选调查，聚集了总共28个成员，我们称之为广泛的恒星弓激波调查(E-BOSS)。我们推导了主要的弓激波参数，并给出了一些关于被探测物体的初步统计结果。结论。我们对初始样本和新探测到的天体的分析得出，围绕OB恒星的弓形激波可探测性为∼10%。探测似乎并不特别依赖于恒星的质量、年龄或位置。E-BOSS样本的扩展，加上即将到来的红外数据，并考虑到，例如，其他光谱类型，将使我们能够对结果进行更详细的研究。
Context. Bow shocks are produced by many astrophysical objects where shock waves are present. Stellar bow shocks, generated by runaway stars, have been previously detected in small numbers and well-studied. Along with progress in model development and improvements in observing instruments, our knowledge of the emission produced by these objects and its origin can now be more clearly understood. Aims. We produce a stellar bow-shock catalogue by applying uniform search criteria and a systematic search process. This catalogue is a starting point for statistical studies, to help us address fundamental questions such as, for instance, the conditions under wich a stellar bow shock is detectable. Methods. By using the newest infrared data releases, we carried out a search for bow shocks produced by early-type runaway stars. We first explored whether a set of known IRAS bow shock candidates are visible in the most recently available IR data, which has much higher resolution and sensitivity. We then carried out a selection of runaway stars from the latest, large runaway catalogue available. In this first release, we focused on OB stars and searched for bow-shaped features in the vicinity of these stars. Results. We provide a bow-shock candidate survey that gathers a total of 28 members, which we call the Extensive stellar BOw Shock Survey (E-BOSS). We derive the main bow-shock parameters, and present some preliminary statistical results on the detected objects. Conclusions. Our analysis of the initial sample and the newly detected objects yields a bow-shock detectability around OB stars of ∼10 per cent. The detections do not seem to depend particularly on either stellar mass, age or position. The extension of the E-BOSS sample, with upcoming IR data, and by considering, for example, other spectral types as well, will allow us to perform a more detailed study of the findings.