마그네타가 시공간을 끌어 초광성 초신성에 전력을 공급합니다.
Ars Technica
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#review
#마그네타
#시공간
#우주
#초광성
#초신성
원문 출처: Ars Technica · Genesis Park에서 요약 및 분석
요약
천문학자들은 우리 우주에서 가장 밝은 폭발 현상 중 하나인 '초광도 초신성'의 강력한 에너지원이 마그네타라는 급격히 회전하는 중성자별일 가능성이 높다는 규명했습니다. 연구진은 마그네타가 주변의 시공간을 뒤틀면서 회전 에너지를 자기 쌍극자 복사 형태로 방출하여 죽어가는 별의 물질을 극도로 밝게 비춘다는 이론을 제시했습니다. 태양 질량과 비슷한 핵이 도시 크기로 압축되는 과정에서 형성된 이 천체는 회전이 멈추는 과정에서 엄청난 에너지를 방출한다고 밝혀졌습니다.
본문
Some of the most extreme explosions in the universe are Type I superluminous supernovae. “They are one of the brightest explosions in the Universe,” says Joseph Farah, an astrophysicist at the University of California, Santa Barbara. For years, astrophysicists tried to understand what exactly makes superluminous supernovae so absurdly powerful. Now it seems like we may finally have some answers. Farah and his colleagues have found that these events are most likely powered by magnetars, rapidly spinning neutron stars that warp the very space and time around them. The power within Magnetars have been a leading candidate for the engine behind superluminous supernovae. The theory says these insanely magnetized stars are born from the collapsing core of the original progenitor star and emit energy via magnetic dipole radiation. “This core is roughly a one solar mass object that gets crushed down to the size of a city,” Farah explains. As its spin slows down, a magnetar bleeds its rotational energy into the expanding material of the dead star, lighting it up. The problem was that this theory did not quite explain observations. In a standard magnetar model, the light curve of the supernova should rise rapidly and then fade away evenly as the neutron star loses its rotational energy. “This way the light curve, in the prediction of this model, just goes up and then down quite smoothly,” Farah says. But when astronomers observe superluminous supernovae, they almost never see this smooth fade. Instead, they see bumps, wiggles, and strange modulations. The light curve flickers over months. For a while, scientists tried to patch the magnetar engine theory to fit observations. Maybe the expanding debris was slamming into irregular shells of material shed by the star before it died. Or perhaps the magnetar engine was spitting out random, violent flares. But these explanations required highly specific, fine-tuned parameters to match what we were seeing through our telescopes.
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