登录 | 立即注册 | 找回密码

[每日一图] 20180411 Fortuitous Flash Candidate for the Farthest Star Yet Seen

tunvsr 发表于 2018-4-11 13:44:00 | 显示全部楼层 |阅读模式

  Fortuitous Flash Candidate for the Farthest Star Yet Seen
影像来源: NASA, ESA, & P. Kelly (U. Minnesota) et al.  Explanation: Was this flash the farthest star yet seen? An unexpected flash of light noticed fortuitously on Hubble Space Telescope images may prove to be not only an unusual gravitational lensing event but also an image of a normal star 100 times farther away than any star previously imaged individually. The featured image shows the galaxy cluster on the left complete with many yellowish galaxies, while on the right is an expanded square where a source appeared in 2016 that was not evident in 2011. The spectrum and variability of this source are strangely unlike a supernova, but rather appear more consistent with a normal blue supergiant star magnified by about a factor of 2000 by a confluence of aligned gravitational lenses. Dubbed Icarus, the source is in a galaxy well behind the galaxy cluster and far across the universe -- at redshift 1.5. If the lens interpretation is correct and Icarus is not an exploding star, further observations of it and other similarly magnified stars could give information about the stellar and dark matter content in the galaxy cluster and the universe.
开放科学: Browse 1,600+ codes in the Astrophysics Source Code Library 明日一图预告: open space

使用道具 举报


您需要登录后才可以回帖 登录 | 立即注册


QQ|申请友链|关于我们|联系我们|版权声明|Archiver|手机版|小黑屋|外空网 ( 粤ICP备16075725号  

Copyright 2013 最新最精彩-社区论坛 版权所有 All Rights Reserved.

Powered by Discuz! X3.4 Copyright
© 2001-2017 Comsenz Inc.    All Rights Reserved.

QQ|申请友链|关于我们|联系我们|版权声明|Archiver|手机版|小黑屋|外空网 ( 粤ICP备16075725号  

GMT+8, 2018-7-17 11:48 , Processed in 0.221013 second(s), 35 queries.

快速回复 返回顶部 返回列表