标题: Spectacular Hubble View of Centaurus A [打印本页] 作者: 张立涛 时间: 2011-6-18 12:52 标题: Spectacular Hubble View of Centaurus A Spectacular Hubble View of Centaurus A
The NASA/ESA Hubble Space Telescope has produced a close-up view of the galaxy Centaurus A. Hubble's out-of-this-world location and world-class Wide Field Camera 3 instrument reveal a dramatic picture of a dynamic galaxy in flux.
Centaurus A, also known as NGC 5128, is well known for its dramatic dusty lanes of dark material. Hubble's new observations, using its most advanced instrument, the Wide Field Camera 3, are the most detailed ever made of this galaxy. They have been combined here in a multi-wavelength image which reveals never-before-seen detail in the dusty portion of the galaxy. As well as features in the visible spectrum, this composite shows ultraviolet light, which comes from young stars, and near-infrared light, which lets us glimpse some of the detail otherwise obscured by the dust.
Centaurus A, also known as NGC 5128, is well known for its dramatic dusty lanes of dark material. Hubble's observations, using its most advanced instrument, the Wide Field Camera 3, are the most detailed ever made of this galaxy. They have been combined here in a multi-wavelength image that reveals never-before-seen detail in the dusty portion of the galaxy.
As well as features in the visible spectrum, this composite shows ultraviolet light from young stars, and near-infrared light, which lets us glimpse some of the detail otherwise obscured by the dust.
The dark dust lane that crosses Centaurus A does not show an absence of stars, but rather a relative lack of starlight, as the opaque clouds block the visible light from reaching us. Hubble's Wide Field Camera 3 has focussed on these dusty regions, which span from corner to corner in this image. Wider views from ground-based telescopes show this stripe crossing the entire galaxy.
Interesting features such as the warped shape of its disc of gas and dust (outside the view) hint that at some point in the past, Centaurus A collided and merged with another galaxy. The shockwaves of this event caused hydrogen gas to coalesce and sparked intense areas of star formation, as seen in its outlying regions and in red patches visible in this Hubble close-up.
The galaxy's compact nucleus contains a highly active supermassive black hole at its centre. Powerful relativistic jets release vast amounts of radio and X-ray radiation -- although these are invisible here as Hubble's instruments are designed to study optical, ultraviolet and infrared wavelengths.
At just over 11 million light-years distant, Centaurus A is relatively nearby in astronomical terms. However, it is not only close, it is also bright. This makes it a very attractive target for amateur astronomers in the southern hemisphere, where it is visible. Stargazers can see the galaxy through binoculars, while larger amateur telescopes begin to unveil the distinctive dusty lanes.
However it is only with the capabilities of the Hubble Space Telescope that many of the features in this image become visible: as well as providing unparalleled clarity and resolution, Hubble's position in orbit means that it can see ultraviolet wavelengths which are blocked by the atmosphere and so invisible from the ground.
作者: ≮风の殇逝≯ 时间: 2011-6-18 13:25
诶····有中文的不作者: ≮风の殇逝≯ 时间: 2011-6-18 13:29
新的观察,用它的最先进的仪器、广角相机3、是最详细的做过这个星系。他们被结合在multi-wavelength形象在满是灰尘的详细揭示前所未见的部分的星系。以及可见光的光谱特征,该复合材料显示紫外线,来自年轻的星星,和近红外波段的光,让我们看到一些细节否则被尘土。
半人马座A,也称为ngc4631,而闻名于世,它那戏剧性的满是灰尘的车道暗色物质。哈勃的观测结果,用它的最先进的仪器、广角相机3、是最详细的做过这个星系。他们被结合在multi-wavelength图像显示在满是灰尘的细节部分前所未见的星系。
以及可见光的光谱特征,该复合材料显示紫外线光从年轻的星星,和近红外波段的光,让我们看到一些细节否则被尘土。穿越黑暗尘埃弄一个没有显示半人马座没有明星,而是相对缺乏,因为不透明的云星光阻断可见光到我们。“哈勃”的广角相机聚焦于这些灰尘3,从地区跨度角落到角落在这个形象。广阔的视野从望远镜条纹穿过整个显示这个星系。
有趣的功能,如这个弯曲的形状的阀瓣的气体和尘埃的观点(外面)在某种程度上暗示了过去,半人马座碰撞与合并与另一个星系。这个事件引起的冲击波氢气体,并且引发了激烈的地区联合恒星的形成,例如在其外围区域可见和红色斑块 作者: ≮风の殇逝≯ 时间: 2011-6-18 13:29
有道直接翻译：
半人马座A,也称为ngc4631,而闻名于世,它那戏剧性的满是灰尘的车道暗色物质。哈勃的新的观察,用它的最先进的仪器、广角相机3、是最详细的做过这个星系。他们被结合在multi-wavelength形象在满是灰尘的详细揭示前所未见的部分的星系。以及可见光的光谱特征,该复合材料显示紫外线,来自年轻的星星,和近红外波段的光,让我们看到一些细节否则被尘土。
半人马座A,也称为ngc4631,而闻名于世,它那戏剧性的满是灰尘的车道暗色物质。哈勃的观测结果,用它的最先进的仪器、广角相机3、是最详细的做过这个星系。他们被结合在multi-wavelength图像显示在满是灰尘的细节部分前所未见的星系。
以及可见光的光谱特征,该复合材料显示紫外线光从年轻的星星,和近红外波段的光,让我们看到一些细节否则被尘土。穿越黑暗尘埃弄一个没有显示半人马座没有明星,而是相对缺乏,因为不透明的云星光阻断可见光到我们。“哈勃”的广角相机聚焦于这些灰尘3,从地区跨度角落到角落在这个形象。广阔的视野从望远镜条纹穿过整个显示这个星系。
有趣的功能,如这个弯曲的形状的阀瓣的气体和尘埃的观点(外面)在某种程度上暗示了过去,半人马座碰撞与合并与另一个星系。这个事件引起的冲击波氢气体,并且引发了激烈的地区联合恒星的形成,例如在其外围区域可见和红色斑块作者: ≮风の殇逝≯ 时间: 2011-6-18 13:31
有道直接翻译：
半人马座A,也称为ngc4631,而闻名于世,它那戏剧性的满是灰尘的车道暗色物质。哈勃的新的观察,用它的最先进的仪器、广角相机3、是最详细的做过这个星系。他们被结合在multi-wavelength形象在满是灰尘的详细揭示前所未见的部分的星系。以及可见光的光谱特征,该复合材料显示紫外线,来自年轻的星星,和近红外波段的光,让我们看到一些细节否则被尘土。
半人马座A,也称为ngc4631,而闻名于世,它那戏剧性的满是灰尘的车道暗色物质。哈勃的观测结果,用它的最先进的仪器、广角相机3、是最详细的做过这个星系。他们被结合在multi-wavelength图像显示在满是灰尘的细节部分前所未见的星系。
以及可见光的光谱特征,该复合材料显示紫外线光从年轻的星星,和近红外波段的光,让我们看到一些细节否则被尘土。穿越黑暗尘埃弄一个没有显示半人马座没有明星,而是相对缺乏,因为不透明的云星光阻断可见光到我们。“哈勃”的广角相机聚焦于这些灰尘3,从地区跨度角落到角落在这个形象。广阔的视野从望远镜条纹穿过整个显示这个星系。
有趣的功能,如这个弯曲的形状的阀瓣的气体和尘埃的观点(外面)在某种程度上暗示了过去,半人马座碰撞与合并与另一个星系。这个事件引起的冲击波氢气体,并且引发了激烈的地区联合恒星的形成,例如在其外围区域可见和红色斑块
