来自MeerKAT的无线电银河系中心
(原标题: The Galactic Center in Radio from MeerKAT)
2022-02-02
浏览次数: 25
我们银河系的中心发生了什么？用光学望远镜很难分辨，因为可见光被星际尘埃阻挡了。然而，在其他波段的光线中，比如无线电，银河系中心可以被成像，显示出它本身是一个非常有趣和活跃的地方。这张特色图片展示了由南非64个射电天线组成的MeerKAT阵列拍摄的银河系中心的最新图像。这张照片的角度大小是月球的四倍（2度），令人印象深刻的是它的巨大、深度和细节。许多已知的来源都清晰地显示了细节，包括许多以Sgr为前缀的来源，因为银河系中心位于人马座的方向。在我们银河系的中心是人马座A，在图像的中心，它容纳了银河系中心的超大质量黑洞。图像中的其他来源不太清楚，包括Sgr A左侧的Arc和许多丝状线。MeerKAT的目标包括寻找更年轻的宇宙中释放的中性氢的射电辐射，以及短暂但遥远的射电闪光。开放科学：浏览天体物理学源代码库中的2700多个代码
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What's happening at the center of our galaxy? It's hard to tell with optical telescopes since visible light is blocked by intervening interstellar dust. In other bands of light, though, such as radio, the galactic center can be imaged and shows itself to be quite an interesting and active place. The featured picture shows the latest image of our Milky Way's center by the MeerKAT array of 64 radio dishes in South Africa. Spanning four times the angular size of the Moon (2 degrees), the image is impressively vast, deep, and detailed. Many known sources are shown in clear detail, including many with a prefix of Sgr, since the galactic center is in the direction of the constellation Sagittarius. In our Galaxy's Center lies Sgr A, found here in the image center, which houses the Milky Way's central supermassive black hole. Other sources in the image are not as well understood, including the Arc, just to the left of Sgr A, and numerous filamentary threads. Goals for MeerKAT include searching for radio emission from neutral hydrogen emitted in a much younger universe and brief but distant radio flashes. Open Science: Browse 2,700+ codes in the Astrophysics Source Code Library