2016年6月16日 星期四

LIGO 第 2 次發現重力波 Signs of black holes merging arrive a century after Albert Einstein predicted them

繼去年 9 月 14 日透過兩座激光干涉重力波天文台 (LIGO) 測量到重力波後,物理學家再在今日 (16.6) 發表報告,指他們成功在去年 12 月 26 日 3:38 UTC 在錄得 14 億光年以外,錄得兩個黑洞合併時散發出的重力波。報告已刊於《物理評論快報》。
第 2 次測量到重力波再次證實愛因斯坦 100 年前提出的廣義相對論。有份參與研究的物理學家 Salvatore Vitale 向 《MIT News》表示:「第一次測量到重力波時,一切實在太美,對我們來說根本是難以置信。而現在,我們又再錄得另一個重力波訊號,證明我們真的觀察到宇宙間有雙黑洞存在。我們相信將來可以繼續測量到重力波,並從中揭開更多科學奧秘。」
我們又做到了!——LIGO 物理學家 Salvatore Vitale。 LIGO 物理學家...
THESTANDNEWS.COM


California Institute of Technology - Caltech
"With the advent of Advanced ‪#‎LIGO‬, we anticipated researchers would eventually succeed at detecting unexpected phenomena, but these two detections thus far have surpassed our expectations. National Science Foundation (NSF)'s 40-year investment in this foundational research is already yielding new information about the nature of the dark universe."— NSF director France A. Córdova (PhD ’79)


The LIGO Scientific Collaboration and the Virgo collaboration identify a second gravitational wave event in the data from Advanced LIGO detectors.
CALTECH.EDU






BREAKING: The Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) has detected gravitational waves from two colliding black holes for the second time. Our coverage from the first detection

 In this paper we investigate a severe pollution episode that occurred in Beijing, Tianjin, and the Hebei province in January 2013. The episode was caused by the combination of anthropogenic emissions and a high-pressure system that trapped pollutants in the boundary layer. Using IASI (Infrared Atmospheric Sounding Interferometer) satellite measurements, high concentrations of key trace gases such as carbon monoxide (CO), sulfur dioxide (SO2), and ammonia (NH3) along with ammonium sulfate aerosol ((NH4)2SO4) are found.



interferometer 

Pronunciation: /ˌɪntəfəˈrɒmɪtə/ 



NOUN

Physics
An instrument in which the interference of two beams of light is employed to makeprecise measurements.


Derivatives



interferometric


Pronunciation: /ˌɪntəfɛrəˈmɛtrɪk/ 
ADJECTIVE



interferometrically


Pronunciation: /ˌɪntəfɛrəˈmɛtrɪk(ə)li/ 
ADVERB



interferometry


Pronunciation: /ˌɪntəfəˈrɒmɪtri/ 
NOUN

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