Direct Imaging of the Massive Black Hole, SgrA^*(Session 5 : Evidence for Giant Black Holes)
Direct Imaging of the Massive Black Hole, SgrA^*(Session 5 : Evidence for Giant Black Holes)
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大型黑洞 SgrA^* 的直接成像（第 5 节：巨型黑洞的证据）
DOI：
10.1143/ptps.155.186
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发表时间：
2004
影响因子：
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通讯作者：
S. Horiuchi
中科院分区：
文献类型：
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作者：
M. Miyoshi;J. Ishitsuka;S. Kameno;Zhi;S. Horiuchi
对黑洞附近区域进行成像是VLBI天文学的最终目标之一。最近的大质量黑洞SgrA* 位于银河系中心，是此类观测的主要候选者。结合近年来的VLBI记录技术和亚毫米波段射电工程，我们已经具备了足够的观测灵敏度。在这里，我们展示了亚毫米VLBI阵列成像SgrA* 的性能模拟。在南半球的一个亚毫米级VLBI阵列上，象VLBA的配置一样，获得了很好的图象。我们还注意到，即使是一个小数组，我们。通过可见度分析可以估算出阴影的大小，进而估算出黑洞的质量。现在，只要在南半球建立一个亚毫米VLBI阵列，就可以揭示SgrA* 的黑洞环境。
Imaging the vicinity of black hole is one of the ultimate goals of VLBI astronomy. The closest massive black hole, SgrA*, located at Galactic center is the leading candidate for such observations. Combined with recent VLBI recording technique and sub-mm radio engineering, we now have the sufficient sensitivity for the observations. We here show performance simulations of sub-mm VLBI arrays for imaging SgrA*. An excellent image is obtained from a sub-mm. VLBI array in southern hemisphere like the configuration of VLBA. We also note that even with a small array, we. can estimate the shadow size and then the mass of black hole from visibility analysis. Now, if only constructing a, sub-mm VLBI array in southern hemisphere, we can unveil the black hole environments of SgrA*.