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arXiv 1102.4029astro-ph.SR
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GG Tau系统在267 GHz的高分辨率成像

High resolution imaging of the GG Tau system at 267 GHz

Vincent Piétu, Frédéric Gueth, Pierre Hily-Blant, Karl-Friedrich Schuster, Jérôme Pety

摘要:

研究环双星盘对于理解双星的形成机制至关重要。虽然光学或中红外图像揭示了散射任务,但毫米观测提供了对尘埃热辐射的直接测量。我们研究了著名的,多个年轻的恒星对象GG头周围的circumbinary磁盘的属性,尽可能高的灵敏度和空间分辨率。我们映射的连续发射的GG头在267 GHz的IRAM高原德布尔干涉仪配备了升级的接收器和LO系统。实现了0.45“x0.25”的角分辨率,对应于65 x35 AU的线性分辨率。GG Tau A的环双星盘被观察到是一个非常清晰的狭窄环。未解析环的宽度。中央双星的辐射被探测到,并与环明显分离:它与GG Tau Aa的位置一致,因此可能追踪到围绕这颗恒星的拱星盘。环双星与环主星物质的质量比约为80。

英文摘要:

Studying circumbinary disks is critical to understanding the formation mechanisms of binary stars. While optical or mid-infrared images reveal the scattered mission, millimeter observations provide direct measurements of the dust thermal emission. We study the properties of the circumbinary disk around the well-known, multiple young stellar object GG Tau with the highest possible sensitivity and spatial resolution. We mapped the continuum emission of GG Tau at 267 GHz using the IRAM Plateau de Bure interferometer equipped with upgraded receivers and LO systems. An angular resolution of 0.45"x0.25" was achieved, corresponding to a linear resolution of 65x35 AU. The GG Tau A circumbinary disk is observed as an extremely clearly defined narrow ring. The width of the ring is not resolved. Emission from the central binary is detected and clearly separated from the ring: it coincides with the GG Tau Aa position and may therefore trace a circumstellar disk around this star. The mass ratio of the circumbinary to circumprimary material is ~80.

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