APOD260104 爱因斯坦十字架重力透镜
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图像提供 & License[1]: NSF[2], NOIRLab[3], AURA[4], WIYN[5]; Processing: J. Rhoads[6] (Arizona State U.[7]) et al.
英文原文:Explanation: Most galaxies have a single nucleus -- does this galaxy have four? The strange answer leads astronomers to conclude that the nucleus of the surrounding galaxy is not even visible in this image . The central cloverleaf is rather light emitted from a background quasar . The gravitational field of the visible foreground galaxy breaks light from this distant quasar into four distinct images. The quasar must be properly aligned behind the center of a massive galaxy for a mirage like this to be evident. The general effect is known as gravitational lensing , and this specific case is known as the Einstein Cross . Stranger still, the images of the Einstein Cross vary in relative brightness, enhanced occasionally by the additional gravitational microlensing effect of specific stars in the foreground galaxy. Almost Hyperspace: Random APOD Generator 说明: 大多数星系只有一个星系核,那么这个星系有四个吗? 这个奇特的答案让天文学家[8]得出结论:周围星系的星系核甚至在这张图像[9]中根本看不见。 中央的四叶草其实是背景类星体发出的光。可见的前景星系的引力场将来自这个遥远类星体的光线分解成四个不同的图像。 中央的四叶草形状[10]其实是是背景类星体[11]发出的光。 可见的前景星系之重力[12]场折射[13]了来自这个遥远类星体[14]的光,形成四个不同的图像。 要形成这样的海市蜃楼[15],类星体[16]必须正确对齐[17]在一个大质量星系的中心后方。 这种现象被称为重力透镜效应[18],而这个例子被称为爱因斯坦十字架[19]。 更奇怪的是,爱因斯坦十字架[20]的图像在相对亮度上会发生变化,有时前景星系中特定恒星的额外重力微透镜效应[21]会增强亮度。
几乎是超空间: 随机每日天文图产生器[22]
明日的图片: box star[23]
Authors & editors: Robert Nemiroff[24] (MTU[25]) & Jerry Bonnell[26] (UMCP[27])
NASA Official: Amber Straughn Specific rights apply[28].
NASA Web Privacy[29], Accessibility[30], Notices[31];
A service of: ASD[32] at NASA[33] / GSFC[34],
NASA Science Activation[35]
& Michigan Tech. U.[36]
太空天文实验室(成功大学物理系)
<br/> 编辑:<a href="mailto:hantzong.su@gmail.com" style="color:gray;" target="_blank">苏汉宗</a>
编辑:陈炳志[37]
[1]https://noirlab.edu/public/copyright/
[4]https://www.aura-astronomy.org/
[6]https://search.asu.edu/profile/858089
[8]https://aas.org/careers/career-in-astronomy
[9]https://noirlab.edu/public/images/noao-q2237/
[10]https://en.wikipedia.org/wiki/Four-leaf_clover
[11]https://en.wikipedia.org/wiki/Quasar
[12]https://spaceplace.nasa.gov/what-is-gravity/en/
[13]https://science.nasa.gov/wp-content/uploads/2024/09/gravitational-lens-diagram-simple.jpg
[14]https://science.nasa.gov/mission/hubble/science/science-behind-the-discoveries/hubble-quasars/
[15]http://apod.nasa.gov/apod/ap990331.html
[16]http://apod.nasa.gov/apod/ap220222.html
[17]https://www.reddit.com/r/cats/comments/1lkdakf/six_of_seven_cuddle_pile_on_the_balcony/#lightbox
[19]http://www.astr.ua.edu/keel/agn/qso2237.html
[20]http://apod.nasa.gov/apod/ap961215.html
[21]https://en.wikipedia.org/wiki/Gravitational_microlensing
[22]https://apod.nasa.gov/apod/random_apod.html
[23]http://apod.nasa.gov/apod/ap260105.html
[24]http://www.phy.mtu.edu/faculty/Nemiroff.html
[26]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[28]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
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[30]https://www.nasa.gov/general/accessibility/
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[32]https://astrophysics.gsfc.nasa.gov/
[34]https://www.nasa.gov/centers/goddard/
[35]https://science.nasa.gov/learners
[37]mailto:alfred@ncku.edu.tw
http://apod.nasa.gov/apod/ap260104.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap260104.html
