A Survey of YSOs with Micro-Jets

对带有微型射流的 YSO 的调查

• 批准号: 11640238
• 负责人: SUGITANI Koji
• 金额: $ 1.6万
• 依托单位: Nagoya City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640238/
• 关键词: micro-iets; protostars; pre-main sequence stars; YSOs; star formation; H alpha emission lines stars; proto-planetary disks

The acceleration and collimation of high-velocity jets associated with YSOs (Young Stellar Objects) are considered to be deeply related to their circumstellar disks. In this research, through observations of near-infrared and optical observation as well as X-ray and radio, we aimed to search for target candidates for detailed studies of the jets, micro-jets and circumstellar disks with Subaru Telescope and/or other large telescopes.We have analyzed the low-dispersion grism spectroscopy data which we obtained with the 2.2m telescope of University of Hawaii and 2.6m telescope of Byurakan Astrophysical Observatory in 1999. As a result, we identified about 10 H alpha stars in star forming regions very near to the sun and many H alpha stars toward the HII regions with bright-rimmed clouds, which are good candidates of YSOs having micro-jects and/or cicumstellar disks. We made followup observations for some of the above candidates by using HARIS (High Angular Resolution Imaging Spectrograph) of University of Hawaii. The lithium absorption line, which is a good indicator of YSO, was detected in most of them. We also obtained near-infrared data for these objects by using SIRIUS (simultaneously Infrared Imager for Unbiased Survey). In the southern sky, we started to search for H alpha stars in nearby star forming regions in the southern sky.

与YSO（年轻恒星物体）相关的高速射流的加速和准直被认为与其星周盘密切相关。在这项研究中，通过近红外和光学观测以及X射线和射电观测，我们的目的是寻找目标候选者，以利用斯巴鲁望远镜和/或其他大型望远镜对喷流、微喷流和星周盘进行详细研究。我们对1999年夏威夷大学2.2m望远镜和Byurakan天体物理观测站2.6m望远镜获得的低色散棱镜光谱数据进行了分析。我们在非常靠近太阳的恒星形成区域中识别出了大约 10 颗 H α 恒星，并且许多 H α 恒星朝向具有亮边云的 HII 区域，这些恒星是具有微射流和/或卷状星盘的 YSO 的良好候选者。我们利用夏威夷大学的HARIS（高角分辨率成像光谱仪）对上述一些候选物进行了跟踪观察。其中大多数都检测到了锂吸收线，这是 YSO 的良好指标。我们还使用 SIRIUS（无偏测量同步红外成像仪）获得了这些物体的近红外数据。在南部天空，我们开始在南部天空附近的恒星形成区寻找Hα星。

项目成果

K.Ogura,K.Sugitani: "A Large Number of Hα; Emission Stars Associated with Bright-Rimmed Clouds"Star Formation 1999,Proceedings of Star Formation 1999,held in Nagoya,Japan ,June 21-25,1999,Editor:T.Nakamoto,Nobeyama Radio Observatory. 381-382 (1999)

K.Ogura、K.Sugitani：“A Large Number of Hα; Emission Stars Associated with Bright-Rimmed Clouds”Star Formation 1999，Proceedings of Star Formation 1999，于日本名古屋举行，1999 年 6 月 21-25 日，编辑：T .Nakamoto，野边山无线电天文台。381-382（1999）

K.Sugitani,M.Tamura,K.Ogura: "Small-Scale Sequential Star Formation in Bright-Rimmed Clouds"Star Formation 1999,Proceedings of Star Formation 1999,held in Nagoya,Japan ,June 21-25,1999,Editor:T.Nakamoto,Nobeyama Radio Observatory. 358-364 (1999)

K.Sugitani,M.Tamura,K.Ogura：“Small-Scale Sequential Star Formation in Bright-Rimmed Clouds”Star Formation 1999，Proceedings of Star Formation 1999，于日本名古屋举行，1999年6月21-25日，编辑：

Nakano,M.Yamauchi,S.,Sugitani,K.,Ogura,K.: "ASCA Observations of the NGC 2264 Molecular Cloud"Astronomical Society of Japan. 52. 437-446 (2000)

Nakano,M.Yamauchi,S.、Sugitani,K.、Ogura,K.：“NGC 2264 分子云的 ASCA 观测”日本天文学会。

Mikami,T.Ogura,K.: "Hα Emission Stars in the Cepheus OB3 Region"Astrophysics and Space Science. 275. 441-462 (2001)

Mikami, T. Ogura, K.：“仙王座 OB3 区域的 Hα 发射星”天体物理学和空间科学 275. 441-462 (2001)。

K.Sugitani,et al.: "2 Millimeter Observations of Bright-rimmed Clouds with IRAS Point Sources"Astrophysical Journal. 119. 323-334 (2000)

K.Sugitani 等人：“用 IRAS 点源对亮边云进行 2 毫米观测”天体物理学杂志。