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ALMA Continuum Spectrum of the M87 Nucleus - Quasi-simultaneous continuum observations at bands-3, 6, 7, and 9

机译:M87原子核的ALMA连续谱-在3、6、7和9波段的准同时连续观测

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We report the preliminary result of ALMA continuum observations toward the M87 nucleus at thirtysix frequencies (quasi-simultaneously) ranging from 90 GHz to 700 GHz. We detected the nuclear component at almost all the frequency points. We found a spectral break at the millimeter regime: a nearly flat spectrum at lower frequencies and a steep spectrum at higher frequencies. The spectral profile indicates a possible physical situation in the vicinity of the central supermassive black hole.
机译:我们报告了从90 GHz到700 GHz的三十六个频率(准同时)对M87原子核进行ALMA连续观测的初步结果。我们在几乎所有频率点都检测到了核成分。我们在毫米范围内发现了一个频谱断裂:较低频率处的频谱接近平坦,较高频率处的频谱陡峭。光谱轮廓指示中央超大质量黑洞附近可能存在的物理情况。

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