APOD250722 双响炮超新星
双响炮超新星
图像提供: ESO[1], P. Das[2] et al.; Background stars (NASA[3]/Hubble[4]): K. Noll et al.
英文原文:Explanation: Can some supernovas explode twice? Yes, when the first explosion acts like a detonator for the second. This is a leading hypothesis for the cause of supernova remnant (SNR) 0509-67.5 . In this two-star system , gravity causes the larger and fluffier star to give up mass to a smaller and denser white dwarf companion. Eventually the white dwarf 's near-surface temperature goes so high that it explodes, creating a shock wave that goes both out and in -- and so triggers a full Type Ia supernova near the center. Recent images of the SNR 0509-67.5 system, like the featured image from the Very Large Telescope in Chile , show two shells with radii and compositions consistent with the double detonation hypothesis . This system, SNR 0509-67.5 is also famous for two standing mysteries : why its bright supernova wasn't noted 400 years ago, and why no visible companion star remains. 说明: 超新星能够爆炸两次吗? 当然可以,由第一次爆炸充当引信[5]点燃了第二次更剧烈的大爆炸,就会出现这样罕见的现象。 这是天文学家对超新星残骸(Supernova remnant, SNR)0509-67.5[6],到底是如何形成的所提出的主要假说。 在这个致密的双星系统[7]中,其中较大质量的膨胀恒星,会通过重力作用将质量转移[8]至一颗较小质量但密度更高的白矮星[9]伴星。 最终,当白矮星[10]的表层物质不断累积,导致其温度升高到足以引发热核爆炸,首次爆炸所产生的冲击波同时向内外扩展[11],进一步在中心附近触发第二次更剧烈的爆炸,形成完整的Ia型超新星[12]。 最近来自智利[13]的甚大望远镜(Very Large Telescope, VLT)[14]所拍摄的主题图像[15]显示,SNR 0509-67.5拥有两层结构相似的壳层,其大小与成分都与所谓的「双响炮[16]」模型相符,进一步支持此假说。 除此之外,SNR 0509-67.5[17]还伴随着两个悬而未解的谜题[18]:为何如此明亮的超新星[19]事件在约400年前,并未被人类所记录?以及,原本的伴星[20]是如何消失得无影无踪?
明日的图片: sand over sand[21]
Authors & editors: Robert Nemiroff[22] (MTU[23]) & Jerry Bonnell[24] (UMCP[25])
NASA Official: Amber Straughn Specific rights apply[26].
NASA Web Privacy[27], Accessibility[28], Notices[29];
A service of: ASD[30] at NASA[31] / GSFC[32],
NASA Science Activation[33]
& Michigan Tech. U.[34]
太空天文实验室(成功大学物理系)
编辑:林昱丞[35]
[2]https://www.unsw.edu.au/hdr/priyam-das
[4]https://science.nasa.gov/mission/hubble/
[5]https://en.wikipedia.org/wiki/Detonator
[6]https://www.eso.org/public/videos/eso2511b/
[7]http://apod.nasa.gov/apod/ap970219.html
[8]https://en.wikipedia.org/wiki/Roche_lobe
[9]https://science.nasa.gov/universe/stars/types/#white-dwarfs
[10]http://apod.nasa.gov/apod/ap950910.html
[11]https://www.eso.org/public/videos/eso2511c/
[12]https://en.wikipedia.org/wiki/Type_Ia_supernova
[13]https://www.eso.org/public/teles-instr/paranal-observatory/vlt/
[14]https://www.eso.org/public/images/eso2511a/
[15]https://www.eso.org/public/images/eso2511a/
[16]https://ui.adsabs.harvard.edu/abs/2025NatAs.tmp..135D/abstract
[17]https://en.wikipedia.org/wiki/SNR_0509-67.5
[18]https://www.shutterstock.com/image-photo/funny-duo-two-black-white-600nw-1209024034.jpg
[19]http://apod.nasa.gov/apod/ap110125.html
[20]http://apod.nasa.gov/apod/ap120112.html
[21]http://apod.nasa.gov/apod/ap250723.html
[22]http://www.phy.mtu.edu/faculty/Nemiroff.html
[24]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[26]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[27]https://www.nasa.gov/about/highlights/HP_Privacy.html
[28]https://www.nasa.gov/general/accessibility/
[29]https://www.nasa.gov/privacy/
[30]https://astrophysics.gsfc.nasa.gov/
[32]https://www.nasa.gov/centers/goddard/
[33]https://science.nasa.gov/learners
[35]http://apod.nasa.gov/apod/l28091033@gs.ncku.edu.tw
http://apod.nasa.gov/apod/ap250722.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap250722.html