球确认~~~~~那个啊啊啊我不膜拜lz你这记忆力了。。。Cr。。惊人的哇哇哇~~~~
11。黑洞泡泡
P1: 讲到一个概念叫galaxy cluster 就是好多galaxy在一块。 科学家们有一个理论：在这些cluster之间，由于X-ray等一些因素，会让温度降低，进而会产生一些新的行星。但是通过观察发现并没有新行星的产生。
P2: 因为发现了bubble 的出现解释了为什么没有新行星出现 ,好像是因为bubble让这儿的气温又上升了
P3: 开始介绍bubble是怎么产生的，是由于黑洞super massive black hole,然后很有可能会制造jets,好像会aligned XX,就可以知道正在制造bubble(这有考题,问怎么才能知道black hole在制造bubbles)
P4: 说这种现象不是持续性的，而是周期性的。Bubble是会循环的,先温度冷却,造成bubble就会提升温度,再降低inflow的速度,然後温度又冷却，再生成bubble
参考：
Feasting Black Hole Blows Bubbles
A monstrous black hole's rude table manners include blowing huge bubbles of hot gas into space. At least, that's the gustatory practice followed by the super massive black hole residing in the hub of the nearby galaxy NGC 4438. These NASA Hubble Space Telescope images of the galaxy's central region clearly show one of the bubbles rising from a dark band of dust. The other bubble, emanating from below the dust band, is barely visible, appearing as dim red blobs in the close-up picture of the galaxy's hub (the colorful picture at right). The background image represents a wider view of the galaxy, with the central region defined by the white box.
Why is the black hole blowing bubbles?
These extremely hot bubbles are caused by the black hole's voracious eating habits. The eating machine is engorging itself with a banquet of material swirling around it in an accretion disk (the white region below the bright bubble). Some of this material is spewed from the disk in opposite directions. Acting like high-powered garden hoses, these twin jets of matter sweep out material in their paths. The jets eventually slam into a wall of dense, slow-moving gas, which is traveling at less than 223,000 mph (360,000 kph). The collision produces the glowing material. The bubbles will continue to expand and will eventually dissipate.
http://hubblesite.org/newscenter/archive/releases/2000/21/
http://www.innovations-report.com/html/reports/physics_astronomy/report-47712.html
http://www.space.com/scienceastronomy/050816_blackhole_jet.html
-- by 会员 nowwsy (2010/7/8 18:50:31)
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发表于 2010-7-8 20:39:32
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