M87
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星系、喷流与著名的黑洞
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室女座星系团
2023年5月26日 Virgo Cluster Galaxies Image Credit & Copyright: Abdullah Alharbi Explanation: Galaxies of the Virgo Cluster are scattered across this nearly 4 degree wide telescopic field of view. About 50 million light-years distant, the Virgo Cluster is the closest large galaxy cluster to our own local galaxy group. Prominent here are Virgo’s bright elliptical galaxies Messier catalog, M87 at bottom center, and M84 and M86 (top to bottom) near top left. M84 and M86 are recognized as part of Markarian’s Chain, a visually striking line-up of galaxies on the left side of this frame. Near the middle of the chain lies an intriguing interacting pair of galaxies, NGC 4438 and NGC 4435, known to some as Markarian’s Eyes. Of course giant elliptical galaxy M87 dominates…
M87中心黑洞的极化光影像
2021年03月31日 M87’s Central Black Hole in Polarized Light Image Credit: Event Horizon Telescope Collaboration; Text: Jayanne English (U. Manitoba) Explanation: To play on Carl Sagan’s famous words “If you wish to make black hole jets, you must first create magnetic fields.” The featured image represents the detected intrinsic spin direction (polarization) of radio waves. The polarizationi is produced by the powerful magnetic field surrounding the supermassive black hole at the center of elliptical galaxy M87. The radio waves were detected by the Event Horizon Telescope (EHT), which combines data from radio telescopes distributed worldwide. The polarization structure, mapped using computer generated flow lines, is overlaid on EHT’s famous black hole image, first published in 2019. The full 3-D magnetic field is complex. Preliminary analyses indicate…
室女座星系团
2020年10月10日 Virgo Cluster Galaxies Image Credit & Copyright: Fernando Pena Explanation: Galaxies of the Virgo Cluster are scattered across this deep telescopic field of view. The cosmic scene spans about three Full Moons, captured in dark skies near Jalisco, Mexico, planet Earth. About 50 million light-years distant, the Virgo Cluster is the closest large galaxy cluster to our own local galaxy group. Prominent here are Virgo’s bright elliptical galaxies from the Messier catalog, M87 at the top left, and M84 and M86 seen (bottom to top) below and right of center. M84 and M86 are recognized as part of Markarian’s Chain, a visually striking line-up of galaxies vertically on the right side of this frame. Near the middle of the chain lies an intriguing interacting…
访问椭圆星系M87的核心
4月10日，事件视界望远镜（EHT）项目通过8个射电望远镜的联网，基于甚长基线干涉技术（VLBI），公布了首张来黑洞照片，来自椭圆星系M87，这段视频让我们可视化的访问M87的核心，来自欧空局（ESA）。
科学家们是如何拍摄首张黑洞照片的？
椭圆星系M87位于室女座，距离我们大约5500万光年，它的中心有一个超大质量黑洞，是我们太阳质量的65亿倍，任何物质都不能逃脱它的重力场，我们无法直接观测黑洞，因此科学家们通过观测黑洞附近的物质环绕黑洞时发出的电磁波，让黑洞像阴影呈现出来。
首张黑洞照片来了，来自椭圆星系M87
事件视界望远镜(EHT)项目的两个主要观测目标，一个是位于我们银河系中心的黑洞Sgr A*，另一个是位于室女座的椭圆星系M87。 这次事件视界望远镜(EHT)项目公布的黑洞照片来自椭圆星系M87，这是人类首次拍摄到的黑洞照片。 这张黑洞照片宛如新月结构，中央部分是黑暗的。 来源：EHT [rml_read_more] 这个黑洞比银心黑洞要大的多。而银心黑洞虽然EHT也测过了，但团队内部对数据处理有较大分歧，暂时并不会发布。（Frey解读） 一个巨大的椭圆星系——M87 M87的视星等为9.6，在5月初的夜空，借助小型望远镜就可观测到。 Credits: Image courtesy of Stellarium M87是一个椭圆星系，位于室女座，距离我们大约5400万光年。M87是几万亿颗恒星的家园，大约包含15000多个球状星团(globular star clusters)，相比之下，我们的银河系仅有数千亿颗恒星，和大约150个球状星团。 M87最引人注目的特征是它的蓝色喷流，从中心向外延伸了数千光年。 Credits: NASA and the Hubble Heritage Team (STScI/AURA) 和Sgr A *一样，M87中心有一个超大质量黑洞，这个黑洞是我们已知最大的黑洞之一，是我们太阳质量的60亿倍，是Sgr A *的1500倍。