江涛

0 收听	15 听众	387 主题

【钱德拉】银河中心：美国宇航局天文台观测银河中心区

发表于 2009-11-28 21:35 | 查看: 3166| 回复: 9来自：江苏省常州市电信

本帖最后由江涛于 2009-11-28 23:51 编辑

登录/注册后可看大图

In celebration of the International Year of Astronomy 2009, NASA's Great Observatories -- the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory -- have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy.

In this spectacular image, observations using infrared light and X-ray light see through the obscuring dust and reveal the intense activity near the galactic core. Note that the center of the galaxy is located within the bright white region to the right of and just below the middle of the image (labeled Sagitarrius A when you roll your mouse over the above composite image). The entire image width covers about one-half a degree, about the same angular width as the full moon.

Each telescope's contribution is presented in a different color:

- Yellow represents the near-infrared observations of Hubble. They outline the energetic regions where stars are being born as well as reveal hundreds of thousands of stars.

- Red represents the infrared observations of Spitzer. The radiation and winds from stars create glowing dust clouds that exhibit complex structures from compact, spherical globules to long, stringy filaments.

- Blue and violet represents the X-ray observations of Chandra. X-rays are emitted by gas heated to millions of degrees by stellar explosions and by outflows from the supermassive black hole in the galaxy's center. The bright blue blob on the left side of the full field image is emission from a double star system containing either a neutron star or a black hole.

When these views are brought together, this composite image provides one of the most detailed views ever of our galaxy's mysterious core.

鉴于2009年国际天文年的庆祝活动，美国宇航局的大天文台-哈勃太空望远镜，斯必泽太空望远镜和钱德拉X射线天文台-合作打造了我们这幅银河系中部地区无与伦比的图像。

这壮观的图象，通过红外线和X射线光看穿了遮蔽灰尘并揭示银河系附近的密集活动的核心。请注意，银河系中心是设在明亮的白色区域的右侧和下方的图像的中间。整个图像宽度约半度，相当于一个满月的直径宽度。每个望远镜的贡献就是描绘出了不同的颜色：

黄色代表了近红外的哈勃望远镜观测。他们表明了恒星正在诞生以及充满活力的地区，揭示了成千上万的恒星。

红色代表斯必泽所拍图像。来自恒星的辐射和星云风创造出了炽热的尘埃云，从而展现出复杂的结构，紧凑的球面，长而细的丝。

蓝色和紫色代表的X射线为钱德拉所拍图像。X射线释放是来自恒星爆炸后加热到几百万度气体和星系中心的超大质量黑洞。全域图中左边明亮的蓝滴来自于一个含有一颗中子星或黑洞的双星系统。
当这些图像汇集后，这个合成图像便提供了有史以来信息最为详细的一张图像，我们星系的神秘核心。

自翻，图片和文字信息均来组钱德拉网站
URL:http://chandra.harvard.edu/photo/2009/galactic/

1024*768