My first love was for the night sky. Love is complicated.
我的初恋给了夜空。 我对它爱很复杂。
You're looking at a fly-through of the Hubble Space Telescope Ultra-Deep Field, one of the most distant images of our universe ever observed. Everything you see here is a galaxy, comprised of billions of stars each. And the farthest galaxy is a trillion, trillion kilometers away.
你们现在看到的是一个哈勃望远镜超深空图像, 这是目前我们能观测到的最遥远的宇宙图像之一。 你们现在所看到的一切都是星系, 每个都由几十亿颗星球组成。 最远的星系距离我们有10的24次方公里。
As an astrophysicist, I have the awesome privilege of studying some of the most exotic objects in our universe. The objects that have captivated me from first crush throughout my career are supermassive, hyperactive black holes. Weighing one to 10 billion times the mass of our own sun, these galactic black holes are devouring material, at a rate of upwards of 1,000 times more than your "average" supermassive black hole. (Laughter)
作为一个天体物理学家,我很荣幸能研究 一些宇宙中最吸引人的东西。 那让我在职业生涯中始终迷恋的 就是超大质量的活跃的黑洞。 这些比太阳重1-100亿倍星级黑洞, 正吞噬着物质, 以超过“平均”超大质量黑洞 1000倍的速度。 (笑声)
These two characteristics, with a few others, make them quasars. At the same time, the objects I study are producing some of the most powerful particle streams ever observed. These narrow streams, called jets, are moving at 99.99 percent of the speed of light, and are pointed directly at the Earth.
这两个特质, 与一些其他的特点一起,使他们成为了类星体。 与此同时,我研究的天体 释放着一些从未检测到的 最强粒子流。 这些细小的粒子流被称为喷射流, 以光速99.99%移动着 而且直冲地球。
These jetted, Earth-pointed, hyperactive and supermassive black holes are called blazars, or blazing quasars. What makes blazars so special is that they're some of the universe's most efficient particle accelerators, transporting incredible amounts of energy throughout a galaxy.
这些高速,直冲地球,活跃且超重的黑洞 被称为耀变体,或者闪耀的类星体。 耀变体如此特殊是因为他们是宇宙中 一些最有效的粒子加速器, 将不可思议的能量传送到星系中。
Here, I'm showing an artist's conception of a blazar. The dinner plate by which material falls onto the black hole is called the accretion disc, shown here in blue. Some of that material is slingshotted around the black hole and accelerated to insanely high speeds in the jet, shown here in white. Although the blazar system is rare, the process by which nature pulls in material via a disk, and then flings some of it out via a jet, is more common. We'll eventually zoom out of the blazar system to show its approximate relationship to the larger galactic context.
现在,我正展示的是一个艺术家对于耀变体的设想图。 物质掉入黑洞时所经过的餐盘 被叫做吸积盘, 也就是蓝色的部分。 有些物质被弹射到黑洞周围 然后在喷射流中加速到异常高的速度 也就是白色的部分。 虽然耀变体系统很少见, 但是通过吸盘自然的吸收物质的过程 然后通过喷射流放出,是很常见的。 我们最后将缩小耀变体系统 来展示它与更大的星系的近似关系。
Beyond the cosmic accounting of what goes in to what goes out, one of the hot topics in blazar astrophysics right now is where the highest-energy jet emission comes from. In this image, I'm interested in where this white blob forms and if, as a result, there's any relationship between the jet and the accretion disc material.
除了对宇宙中进出的物质的计算外, 目前在耀变体天体物理学中的一个热点话题是 那些高能的喷射流来自哪里。 在这张图中,我感兴趣的是这些白色物质来自哪里 还有,是否最终这些喷射流与吸积盘 之间有任何的联系呢。
Clear answers to this question were almost completely inaccessible until 2008, when NASA launched a new telescope that better detects gamma ray light -- that is, light with energies a million times higher than your standard x-ray scan. I simultaneously compare variations between the gamma ray light data and the visible light data from day to day and year to year, to better localize these gamma ray blobs. My research shows that in some instances, these blobs form much closer to the black hole than we initially thought.
对于这个问题的清晰的回答 在2008年以前几乎是没有的, 直到美国宇航局发射了一个能够更好的探测伽玛射线的新望远镜 这种射线相比X射线, 有比其高一百万倍的能量。 同时,我年复一年日复一日的比较 伽玛射线的数据和其他可见光的数据的变化, 来更好的定位伽玛射线圈。 我的研究表明有些时候, 这些射线圈比我们预想的 要距离黑洞更近。
As we more confidently localize where these gamma ray blobs are forming, we can better understand how jets are being accelerated, and ultimately reveal the dynamic processes by which some of the most fascinating objects in our universe are formed.
当我们越发确定 伽玛射线圈形成的地方, 我们就能更好的理解喷射流被加速过程, 最终揭示 宇宙中一些迷人的天体的动态形成过程。
This all started as a love story. And it still is. This love transformed me from a curious, stargazing young girl to a professional astrophysicist, hot on the heels of celestial discovery. Who knew that chasing after the universe would ground me so deeply to my mission here on Earth. Then again, when do we ever know where love's first flutter will truly take us.
这是一个爱情故事开始的。 并且一直是。 这个爱把我从一个好奇的,仰望星空的小女孩 转变成一个天体物理学家专家, 热衷于发现天体。 谁知道追随着宇宙 会让我深深地投入到我在地球上的工作中。 还有,我们什么时候会知道 我们的爱好最终会将我们引向何方。
Thank you.
谢谢大家。
(Applause)
(掌声)