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这是我们发现的最大中子星碰撞事件

This Is the Biggest Neutron Star Collision We’ve Ever Detected

Gravitational waves resulting from crashing neutron stars
中子星碰撞产生的引力波
have rocked our universe once again.
再次震动了我们的宇宙
And while you may not have felt it, LIGO sure did
尽管你可能感受不到 但LIGO可以
and measured it for the second time ever.
而且还有史以来第二次观测到中子星碰撞的引力波
And these gravitational waves are the ripples from a collision of
我们所观测到的质量最大的中子星对
the most massive neutron star pair we have ever witnessed.
碰撞产生了这些引力波
As you may know, this isn’t LIGO’s first rodeo with gravitational waves.
你或许知道 这并不是LIGO与引力波的第一次较量
They’re famous for the first ever detection of
2015年 LIGO首次探测到了
gravitational waves back in 2015,
产生于黑洞合并的引力波
which were the result of a black hole merger.
这使它一举成名
Then LIGO detected their first ever gravitational waves
2017年 LIGO又首次探测到了
from a neutron star merger in 2017.
因中子星合并而产生的引力波
And this latest neutron star collision, observed in 2019,
而这次2019年最新发现的中子星碰撞事件
was given the catchy name…GW190425.
被赋予了一个朗朗上口的名字 GW190425
Just as a quick refresher,
让我们来快速复习一下
LIGO is the Laser Interferometer Gravitational-Wave Observatory.
LIGO是激光干涉引力波天文台
It detects these tiny disturbances in the fabric of space-time,
它观测时空构造中的微小扰动
like ripples on the surface of a pond.
这些扰动就像池塘表面的波纹
They travel through the universe at the speed of light,
它们以光速在宇宙中穿梭
and typically only distort physical space here on Earth
通常只扭曲地球上
by about the width of an atom’s nucleus.
约一个原子核宽的物理空间
And even though gravitational waves are practically infinitesimal
尽管当引力波到达地球时
by the time they reach us here on Earth,
几乎是无穷小的
the strongest ones we can measure with our instruments
但我们能用仪器探测到的最强引力波
are caused by gigantic cosmic events:
却产生于宇宙中的重大事件
like collisions of black holes or neutron stars.
例如黑洞或中子星的碰撞
The 2019 event was actually detected on
2019年的事件 实际上只被
only one of the two U.S. LIGO sites
美国的两个LIGO其中一个探测到
—the one in Louisiana
路易斯安那州的那个
because the detector in Washington was offline.
因为华盛顿的那个探测器离线了
This is LIGO’s first single-detector event,
这是LIGO的第一次单探测器事件
which is impressive,
令人印象深刻
but it also means
但这也意味着
researchers weren’t able to narrow down the merger’s location
研究员们不能像使用两个在线探测器时一样
as much as they might have been able to with two detectors online.
缩减合并地点的定位范围
Though as of right now, the merged neutron stars could exist
就目前看来 合并的中子星可能存在于
anywhere in an area that makes about 20% of the sky,
20%的天空区域内的任何地方
not exactly a small window.
这可不是一个小窗口
The team deduced from the data
研究小组从数据推论出
that the combined mass of the two neutron stars was about 3.4 times greater than the mass of our Sun,
两个中子星的总质量约比太阳大3.4倍
making it the most massive neutron star merger we’ve ever observed.
这是我们有史以来观测到的最大质量的中子星合并事件
And it’s different from the 2017 event, too,
而且它与2017年的事件不同
because it wasn’t accompanied
因为它不伴有
by any kind of electromagnetic radiation that we could detect
任何我们可以检测到的电磁辐射
—it was missing what some scientists call a ‘flash of light’.
它缺少一些科学家所说的“闪光”
And perhaps most intriguingly,
最有趣的或许是
it appears to have created an object with unusually high mass.
它似乎创造出了一个异常大质量的物体
Higher mass than we’ve ever seen before from a neutron star merger,
比我们之前从中子星合并中看到的 质量要更大
and higher than we expected.
并且超过了我们的预期
With this second observation of neutron stars colliding,
通过对中子星碰撞的第二次观测
scientists are gathering clues
科学家们正在搜集
about how these cosmic events affect our universe.
关于这些宇宙事件如何影响宇宙的线索
A neutron star is a super-dense remnant of a star after it erupts into a supernova.
中子星是恒星在超新星爆炸后的超高密度残留物
They’re basically laboratories of really extreme physics.
它们基本上是极端物理学的实验室
They tell us a lot about
我们可从中了解很多
space and how it evolves over time,
关于宇宙及其怎样随时间演变的知识
so to witness and measure a collision of two of them
因此 观测其中两个中子星的碰撞
can yield some really rich insights.
能够丰富我们的见解
Like LIGO’s observation of this in 2017 was the first ever,
如LIGO在2017年的首次观测
yes, so very exciting
没错 激动人心
But it also yielded data confirming the hypothesis
但它也产生了足以证明以下假设的数据
that neutron stars crushing into each other are a source of heavy elements,
中子星的相互碰撞是重元素的来源之一
producing stuff like gold and platinum.
从中产生了诸如金和铂一类的物质
They’re basically heavy element factories.
它们简直就是重元素工厂
And we still don’t know a lot about what happens to neutron stars
我们对中子星合并到一起后会发生什么
after they merge together,
仍所知甚少
so scientists were hoping this latest detection would drop some hints.
所以科学家们希望这项最新发现能提供一些线索
All of the data from this 2019 event
这次2019年事件的所有数据
—the massive object left behind in the merger’s wake,
包括合并后留下的大质量天体
plus the lack of electromagnetic radiation
以及电磁辐射的缺乏
—leads some scientists to believe that
使得一些科学家相信
these two neutron stars may have become a black hole after they merged.
这两个中子星合并后可能已经变成了黑洞
Maybe. But it could also just be that
也许吧 但也可能是因为
we weren’t looking in the right place at the right time
我们没有在对的时间对的地点进行观测
and we missed the flash of light.
我们错过了闪光
So astrophysicists are going to keep probing this data
因此天体物理学家们将继续研究这些数据
to see if they can gain any more insights,
来看他们能否获得更多见解
and hopefully LIGO will capture many more events like this in the future
希望LIGO在将来能捕获到更多的此类事件
to tell us even more about the crazy cosmic collisions
以便获得更多关于疯狂的宇宙级碰撞的信息
that both create and disturb very fabric of our universe.
它们既创造又扰乱了宇宙的结构
In order to do this, LIGO does has some serious upgrades planned,
为了做到这一点 LIGO确实有一些重要的升级计划
so check out this vedio here to learn all about that.
观看此视频来了解更多相关信息
And make sure you subscribe to Seeker for all things space-time.
订阅探索新闻台 探索时空万物
If you have another cosmic event you want to see us cover,
如果您还想看我们报道其他宇宙事件
let us know down in the comments below
请在下面的评论中告知我们
and as always, thanks so much for watching.
一如既往感谢您的收看
I’ll see you next time.
下期节目见

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视频概述

2019年LIGO检测到最大中子星碰撞事件,这项最新发现将为科学家们探索宇宙提供一些新的线索。

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收集自网络

翻译译者

三顷

审核员

审核员SR

视频来源

https://www.youtube.com/watch?v=WXp6O1lqLvs

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