Mashable 2024年11月22日
Scientists watch hardcore object blasting energy beams into space
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NASA的钱德拉X射线天文台观测到一颗名为PSR B2224+65的脉冲星,它喷射出一束长达12万亿英里的能量粒子束,形成了一个巨大的吉他形状的星云。这个星云是由脉冲星喷射出的粒子在漫长的时间里吹出气泡,最终聚集而成。脉冲星以其快速旋转和周期性发射能量脉冲而闻名,而此次发现的“吉他星云”则展现了脉冲星对周围环境的塑造能力,也为我们提供了宇宙中独特而壮观的景象。

🤔脉冲星PSR B2224+65以极快的速度旋转,并向太空喷射出一束“火焰状”的能量粒子束,这束能量粒子束长达12万亿英里。

🎸脉冲星喷射出的粒子在数百万年的时间里吹出气泡,形成了一个巨大的吉他形状的星云,该星云由氢气构成,位于仙王座,距离地球约2700光年。

💫脉冲星是坍缩恒星的残骸,密度极高,仅一小块物质就重达10亿吨。它们会以规则的间隔发射能量脉冲,就像宇宙中的灯塔。

🌌脉冲星的两极会喷射出能量粒子,这些粒子在强磁场中快速运动产生,从地球上观察这些光束会以秒或毫秒为单位脉冲。

💥有时,两颗中子星会发生碰撞,产生宇宙中最神秘的天体——黑洞,其引力强大到连光都无法逃脱。

A rapidly spinning, profoundly dense object is blasting a "flame-like" beam into space.

It's a type of neutron star — the remnants of a collapsed, exploded star so dense that just a sugar cube-sized piece of this extremely compact material weighs 1 billion tons — called a "pulsar." That's because the star shoots out "pulses" of energy at regular intervals (kind of like a cosmic lighthouse). Astronomers have used NASA’s Chandra X-ray Observatory and other instruments to watch this pulsar's behavior for over two decades, and it shows a vibrant interstellar scene.

"Normally found only in heavy metal bands or certain post-apocalyptic films, a 'flame-throwing guitar' has now been spotted moving through space," the space agency said in a statement.

Why a "flame-throwing guitar"?

As the image and clip below show, the fast-spinning pulsar, formally named "pulsar PSR B2224+65," is blasting out a 12-trillion-mile-long beam of energized particles and energy, which is colored reddish-orange. But that's not all. Beneath the pulsar is a colossal guitar-shaped cloud, made of hydrogen gas. This cloud, called a nebula, formed when particles shooting out from the pulsar blew gaseous bubbles over eons, ultimately amassing into the great cloud.

"The guitar shape is undeniable, and is traced by a thin white line in the labeled composite image," NASA wrote. It's located some 2,700 light-years from Earth in the constellation Cepheus.

The "Guitar Nebula" outlined beneath the filament-shooting pulsar. Credit: X-ray: NASA / CXC / Stanford Univ. / M. de Vries et al.; Optical: (Hubble) NASA / ESA / STScI and (Palomar) Hale Telescope / Palomar / CalTech; Illustrated outline: NASA / CXC / K. DiVona; Image Processing: NASA / CXC / SAO / L. Frattare

Pulsars make themselves known to us by the two jets of energized particles emanating from their poles (which are produced by the particles rapidly moving around the neutron stars' potent magnetic fields). From our vantage point many light-years away, these beams of light can pulse in seconds or even milliseconds. The fastest known pulsars spin at some 716 times per second.

Sometimes, two neutron stars collide, a dramatic event that can produce the most enigmatic object in the universe — a black hole, a realm so gravitationally powerful, not even light can escape.

It's a wild universe out there.

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脉冲星 星云 吉他星云 中子星 宇宙
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