轩辕十四和矮星系
(原标题: Regulus and the Dwarf Galaxy)
2024-04-26
浏览次数: 15
在北半球的春天，明亮的轩辕十四很容易在东方地平线上被发现。狮子座的阿尔法星，轩辕十四是这张望远镜视野中心的尖星。轩辕十四距离我们只有79光年，它是一颗炙热、快速旋转的恒星，是一个多恒星系统的一部分。在炫目的光线中并没有完全消失，在轩轩座下方的模糊区域是来自小星系狮子座I的漫射星光。狮子座I是一个矮球状星系，是本星系群的成员，由我们的银河系和仙女座星系（M31）主导。狮子座一号距离我们大约80万光年，被认为是已知的环绕银河系的小卫星星系中最遥远的一个。但矮星系狮子座1号已经显示出在其中心有一个超大质量黑洞的证据，其质量与银河系中心的黑洞相当。
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In northern hemisphere spring, bright star Regulus is easy to spot above the eastern horizon. The alpha star of the constellation Leo, Regulus is the spiky star centered in this telescopic field of view. A mere 79 light-years distant, Regulus is a hot, rapidly spinning star that is known to be part of a multiple star system. Not quite lost in the glare, the fuzzy patch just below Regulus is diffuse starlight from small galaxy Leo I. Leo I is a dwarf spheroidal galaxy, a member of the Local Group of galaxies dominated by our Milky Way Galaxy and the Andromeda Galaxy (M31). About 800 thousand light-years away, Leo I is thought to be the most distant of the known small satellite galaxies orbiting the Milky Way. But dwarf galaxy Leo I has shown evidence of a supermassive black hole at its center, comparable in mass to the black hole at the center of the Milky Way.
© Markus Horn