우주에서 가장 큰 폭발인 감마레이 버스트는 수십억광년이 떨어져 있음에도 지상에서의 망원경으로도 쉽게 볼 수 있다는군요. 과학자들은 Keck I 라고하는 하와이에 있는 세계에서 가장 큰 광학망원경을 사용해서 14 Swift 라는 지역의 Dark bursts 를 밝혀냈다고 합니다.

아래는 사진 설명 원문 입니다.

Gamma-ray bursts are the universe's biggest explosions, capable of producing so much light that ground-based telescopes easily detect it billions of light-years away. Yet, for more than a decade, astronomers have puzzled over the nature of so-called dark bursts, which produce gamma rays and X-rays but little or no visible light. They make up roughly half of the bursts detected by NASA's Swift satellite since its 2004 launch.

Using one of the world's largest optical telescopes, the Keck I in Hawaii, researchers looked for unknown galaxies at the locations of 14 Swift-discovered dark bursts.

In this artist's concept, dense knots of dust in otherwise normal galaxies dim the light of a dark gamma-ray burst (center). The dust absorbs most or all of a burst's visible light but not higher-energy X-rays and gamma rays.

Image Credit NASA/Swift/Aurore Simonnet


'Universe > NASA' 카테고리의 다른 글

Crescent Earth  (0) 2009.06.30
LRO and LCROSS Launch on Lunar Journey  (0) 2009.06.20
Shedding Light on Dark Gamma Ray Bursts  (0) 2009.06.20
Trio of Galaxies Mix It Up  (0) 2009.06.20
토성의 달, 『엔셀라두스 (Enceladus)』  (0) 2009.05.28
Galaxy Triplet ARP 274  (0) 2009.05.28