标题： 超大质量黑洞SgrA*图像中暗斑的物理起源由EHT合作揭示 显示英文标题

标题： Physical origin of the dark spot at the image of supermassive black hole SgrA* revealed by the EHT collaboration

摘要： 我们阐明了最近由EHT合作组发布的超大质量黑洞SgrA*图像中暗斑的物理起源。 认为这个暗斑明显比经典的黑洞阴影小，是事件视界球体的北半球。 经典的黑洞阴影在SgrA*的图像中不可见。 SgrA*图像中的暗斑投影在天球上经典黑洞阴影的位置内。 这个暗斑的外边界是事件视界球体上的赤道。 显示英文摘要

摘要： We elucidate the physical origin of the dark spot in the image of supermassive black hole SgrA* presented very recently by the EHT collaboration. It is argued that this dark spot, which is noticeably smaller than the classical black hole shadow, is the northern hemisphere of the event horizon globe. The classical black hole shadow is unseen in the image of SgrA*. The dark spot in the image of SgrA* is projected within the position of the classical black hole shadow on the celestial sphere. The outer boundary of this dark spot is an equator on the event horizon globe.