Pre-main-sequence isochrones - III. The Cluster Collaboration isochrone server
Pre-main-sequence isochrones - III. The Cluster Collaboration isochrone server
复制标题
前主层序等时线 - III。
DOI：
10.1093/mnras/stu1944
复制
发表时间：
2014
影响因子：
4.8
通讯作者：
Bell C
中科院分区：
文献类型：
--
作者：
Bell C
我们在以下系统中提供了半经验主序前模型等时线的等时线服务器：约翰逊-Cousins、斯隆数字巡天、两微米全天空巡天、艾萨克·牛顿望远镜（INT）宽视场相机和INT光度Hα测量（IPHAS）/紫外过量测量（UVEX）。可以通过群集协作网页http://www.astro.ex.ac.uk/people/timn/isochrones/访问服务器。为了实现这一目标，我们使用了观测到的年轻星团中成员恒星的颜色，这些恒星具有明确的年龄，距离和变红，以在颜色-星等图中创建基准轨迹。这些经验序列已被用来量化的模型和数据之间的差异所产生的不确定性，在内部和大气模型，导致表中的半经验测辐射热校正（BC）在各种测光系统。通过服务器提供的模型等时线是基于现有的恒星内部模型，加上我们新推导的半经验BC。作为分析的一部分，我们还提出了新的星团参数，为昴宿星和Praesepe，产生的年龄和距离分别为132 ± 2秒差距和184 ± 2秒差距（仅统计不确定性）。
We present an isochrone server for semi-empirical pre-main-sequence model isochrones in the following systems: Johnson–Cousins, Sloan Digital Sky Survey, Two-Micron All-Sky Survey, Isaac Newton Telescope (INT) Wide-Field Camera and INT Photometric Hα Survey (IPHAS)/UV-Excess Survey (UVEX). The server can be accessed via the Cluster Collaboration webpage http://www.astro.ex.ac.uk/people/timn/isochrones/. To achieve this, we have used the observed colours of member stars in young clusters with well-established age, distance and reddening to create fiducial loci in the colour–magnitude diagram. These empirical sequences have been used to quantify the discrepancy between the models and data arising from uncertainties in both the interior and atmospheric models, resulting in tables of semi-empirical bolometric corrections (BCs) in the various photometric systems. The model isochrones made available through the server are based on existing stellar interior models coupled with our newly derived semi-empirical BCs. As part of this analysis, we also present new cluster parameters for both the Pleiades and Praesepe, yielding ages ofandas well as distances of 132 ± 2 and 184 ± 2 pc, respectively (statistical uncertainty only).