Infrared Monitor Observations of T-Tauri Stars

金牛座 T 星的红外监测仪观测

• 批准号: 12640230
• 负责人: UENO Munetaka
• 金额: $ 2.37万
• 依托单位: the University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640230/
• 关键词: Infrared observations; T Tauri stars; Time variation; Infrared camera; Monitor observations; Star formation; 星生成領域; 星形成領域

The ultimate goal of this project is to find out the origin of time variation of brightness of T Tauri stars by monitor observations at infrared wavelength. The origin is supposed to associate with the surface activities of T-Tauri star as well as activity at the contact region between the photosphere and the disk. Infrared monitor observations are still very limited in area as well as the time intervals.We prepared infrared camera and small telescope, which enable us to use rather wide field of view covering approximately 0.3 square degree of arc, to realize efficient observations. The system also has capability to observe several T Tauri stars as well as flux standard stars (second calibrators) in a single field of view. The sensitivities of the system, with 10 of signal-to-noise ratio at 20 minutes of exposure, are 17 magnitude at J band, 15.5 magnitude at H band, and 14 magnitude at K' band, whose depth is enough to observe T Tauri stars in Taurus star forming regions (lying at 140pc from us). To develop the camera part, we first started evaluation of InSb infrared array which is a test model of the infrared camera on board ASTRO-F mission. We carried out the evaluations using liquid He cooled chamber to operate the sensor device, COGITO-3 multi control system to operate the detector, and 32 cm Newtonian telescope in Komaba campus. The optics to minimize the Coma aberration was also developed to get a wide field of view at infrared wavelength. We have made monitor observations of T Tauri stars and been extending the projected observations of star forming regions with ASTRO-F.

本项目的最终目标是通过红外波段的监测观测，找出金牛座T星亮度随时间变化的原因。其成因与金牛座T型星星的表面活动以及光球与盘接触区的活动有关。红外监测仪的观测范围和时间间隔还很有限，我们准备了红外相机和小型望远镜，使我们能够利用约0.3平方度的较宽视场进行有效观测。该系统还能够在一个视场内观测几颗金牛座T星以及通量标准星（第二校准星）。该系统的灵敏度J波段为17等，H波段为15.5等，K'波段为14等，曝光20分钟时信噪比为10，其深度足以观测金牛座星星形成区（距我们140 pc）的金牛座T星。为了开发相机部分，我们首先开始评估InSb红外阵列，这是ASTRO-F使命上红外相机的测试模型。我们进行了评估，使用液氦冷却室操作的传感器设备，COGITO-3多控制系统操作的探测器，和32厘米牛顿望远镜在驹场校园。为了在红外波段获得较宽的视场，还设计了减小彗差的光学系统。我们对金牛座T星进行了监测观测，并利用ASTRO-F扩展了对星星形成区的预测观测。

项目成果

IRC (Infrared Camera) onboard ASTRO-F (IRIS) : design overview and current status

ASTRO-F (IRIS) 上的 IRC（红外摄像机）：设计概述和当前状态

• 发表时间: 2000
• 期刊: SPIE 4013
• 作者: Watarai;H.;Fujita;S.;Ishihara;D.;Kataza;H.;Kim;WJ.;Maeda;I.;Matsuhara;H.;Matsumoto;T.;Murakami;H.;Negishi;T.;Onaka;T.;Ootsubo;T.;Takeyama;N.;Uemizu;K.;Ueno;M.;Wada;T.
• 通讯作者: T.

Ishiguro, M, Ueno, M 他: "First Detection of an Optical Dust Trail along the Orbit of 22P/Kopff"The Astrophysical Journal. 572. L117 (2002)

Ishiguro, M、Ueno, M 等人：“首次检测到 22P/Kopff 轨道上的光学尘埃轨迹”《天体物理学杂志》572. L117 (2002)。

Ishituska, J.K., Imai, H., Omodaka T., Ueno M., Kameya, O., Sasao T., Morimoto M., Miyaji T.: "VLBI Monitoring Observation of the Semi-Regular Variable Star R Crateris"Pub. Astron. Soc. Japan. Vol.53. 2074-2085 (2000)

Ishituska, J.K.、Imai, H.、Omodaka T.、Ueno M.、Kameya, O.、Sasao T.、Morimoto M.、Miyaji T.：“半规则变星 R Crateris 的 VLBI 监测观测”Pub。

Hirao, T., Matsuo, H., Matsuura, S., Murakami, H., Noda, M., Ootsubo, T., Ueno, M: "Search for Exozodiacal Dust: Are Vega-like Stars Common?"Mid-and Far Infrared Astronomy and Future Space Missions. 19-26 (2000)

Hirao, T.、Matsuo, H.、Matsuura, S.、Murakami, H.、Noda, M.、Ootsubo, T.、Ueno, M：“寻找外星尘埃：类似织女星的恒星常见吗？”

VLBI Monitoring Observation of the Semi-Regular Variable Star R Crateris

半规则变星R陨石坑的VLBI监测观测

• 发表时间: 2001
• 期刊: Pub.Astron.Soc.Japan 153
• 作者: Ishitsuka;J.K.;Imai;H.;Omodaka T.;Ueno M.;Kameya;O.;Sasao T.;Morimoto M.;Miyaji T.
• 通讯作者: Miyaji T.