IPHAS和共生星。II。新的发现和最常见的模仿样本
IPHAS and the symbiotic stars. II. New discoveries and a sample of the most common mimics
摘要：
在以前的论文中[arXiv：0712.2391]，我们提出了在IPHAS中搜索共生星所需的选择标准，IPHAS是对北银河系平面的INT Halalpha调查。IPHAS使我们有机会在有限的体积内系统地、完整地搜索共生星。跟踪光谱在不同的望远镜在世界各地的样本六十二共生恒星候选人。在19颗S型候选恒星中，有7颗被证实是真正的共生星。它们的红巨星成分的光谱类型，以及红化和距离，都是通过模拟光谱来计算的。在观察到的43个候选系统中，只发现了一个新的D型共生系统，这与预期的一致（参见我们论文中关于选择标准的讨论）。该物体显示出高密度外流以大于65公里/秒的速度扩张的证据。大多数其他的候选者是轻微变红的经典金牛座T星和更高度变红的年轻恒星，可能是更大质量的HAeBe型年轻恒星或经典Be星。此外，还发现了一些值得注意的天体，如三颗新的沃尔夫-拉叶星和两颗相对高光度的演化大质量恒星。我们还发现了一个富含氦的来源，可能是一个密集的喷出物隐藏了一颗WR恒星，它被一个大的电离星云包围。
英文摘要：
In a previous paper [arXiv:0712.2391], we presented the selection criteria needed to search for symbiotic stars in IPHAS, the INT Halpha survey of the Northern Galactic plane. IPHAS gives us the opportunity to make a systematic, complete search for symbiotic stars in a magnitude-limited volume. Follow-up spectroscopy at different telescopes worldwide of a sample of sixty two symbiotic star candidates is presented. Seven out of nineteen S-type candidates observed spectroscopically are confirmed to be genuine symbiotic stars. The spectral type of their red giant components, as well as reddening and distance, were computed by modelling the spectra. Only one new D-type symbiotic system, out of forty-three candidates observed, was found. This was as expected (see discussion in our paper on the selection criteria). The object shows evidence for a high density outflow expanding at a speed larger than 65 km/s. Most of the other candidates are lightly reddened classical T Tauri stars and more highly reddened young stellar objects that may be either more massive young stars of HAeBe type or classical Be stars. In addition, a few notable objects have been found, such as three new Wolf-Rayet stars and two relatively high-luminosity evolved massive stars. We also found a helium-rich source, possibly a dense ejecta hiding a WR star, which is surrounded by a large ionized nebula.
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