另眼系列之M104
来源:http://antwrp.gsfc.nasa.gov/apod/http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/apod.html
影像版权与提供: Vicent Peris (OAUV / PTeam), MAST, STScI, AURA, NASA
说明:旋涡星系M104，是以它侧面寛广的圈状黝黑尘埃带著称。在鼓胀星系核心的明亮恒星之衬托下，可见光影像里的这道尘埃带，具有墨西哥草帽的外观，也因此让它获得草帽星系的昵称。上面这张照片，是来自重新处理过的哈勃太空望远镜旧影像，以呈现这个著名星系的另类视界。这幅再处理的影像，让以往受到星系眩目光芒埋没的结构能够显现出来，尤其是得以见到明亮中心区深处的尘埃带构造。星系M104是室女座星系团南缘最大的成员星系之一，大小约为五万光年，离我们则有二千八百万光年远。
^-^为方便大家打开阅读就不贴大图了，如果想看大图可以下载附件。注:分卷压缩，全部下载方可解压。大图更清晰。
[ 本帖最后由 寻找拉玛 于 2008-3-8 16:33 编辑 ] 来源:钱德拉X射线空间望远镜网站
http://chandra.harvard.edu/photo/2007/sombrero/index.html
草帽星系
The Sombrero, also known as M104, is one of the largest galaxies in the nearby Virgo cluster, about 28 million light years from Earth. This Great Observatories view of the famous Sombrero galaxy was made using NASA's Chandra X-ray Observatory, Hubble Space Telescope and Spitzer Space Telescope. The main figure shows the combined image from the three telescopes, while the three inset images show the separate observatory views.
草帽星系又叫M104，是邻近室女座星系团中最大的成员之一，距离地球约2800万光年。这张著名草帽星系的照片是NASA的钱德拉X射线天文台、哈勃太空望远镜与斯必泽太空望远镜大这3架大天文台所见的图景。主图是用3架望远镜拍摄的照片合成的，插入的3张小图为各天文台单独拍摄的照片。
The Chandra X-ray image (in blue) shows hot gas in the galaxy and point sources that are a mixture of objects within the Sombrero as well as quasars in the background. The Chandra observations show that diffuse X-ray emission extends over 60,000 light years from the center of the Sombrero. (The galaxy itself spans 50,000 light years across.) Scientists think this extended X-ray glow may be the result of a wind from the galaxy, primarily being driven by supernovas that have exploded within its bulge and disk. The Hubble optical image (green) shows a bulge of starlight partially blocked by a rim of dust, as this spiral galaxy is being observed edge on. That same rim of dust appears bright in Spitzer's infrared image, which also reveals that Sombrero's central bulge of stars.
钱德拉拍摄的X射线图象（蓝色）显示的是星系中的热气体和点源，后者既有草帽星系内的不同天体，也有背景类星体。钱德拉的观测显示，弥漫的X射线辐射自草帽星系的中心延展到了60000光年以外。（星系本身的尺度是50000光年。）科学家认为，延展的X射线可能是星系风所造就的，星系风的动力主要来自核球与星系盘中的超新星爆发。哈勃拍摄的可见光图象（绿色）展现了星系的核球，其星光被这一侧向星系的尘埃带所遮挡。这条尘埃带在斯必泽的红外图象中呈明亮的条带。红外图象中亦可见草帽星系由恒星组成的核球。
[ 本帖最后由 寻找拉玛 于 2008-3-8 15:41 编辑 ] 来源:http://gallery.spitzer.caltech.e ... ge_name=ssc2005-11a
Spitzer Spies Spectacular Sombrero
NASA's Spitzer and Hubble Space Telescopes joined forces to create this striking composite image of one of the most popular sights in the universe. Messier 104 is commonly known as the Sombrero galaxy because in visible light, it resembles the broad-brimmed Mexican hat. However, in Spitzer's striking infrared view, the galaxy looks more like a "bull's eye."
In Hubble's visible light image (lower left panel), only the near rim of dust can be clearly seen in silhouette. Recent observations using Spitzer's infrared array camera (lower right panel) uncovered the bright, smooth ring of dust circling the galaxy, seen in red. Spitzer's infrared view of the starlight, piercing through the obscuring dust, is easily seen, along with the bulge of stars and an otherwise hidden disk of stars within the dust ring.
Spitzer's full view shows the disk is warped, which is often the result of a gravitational encounter with another galaxy, and clumpy areas spotted in the far edges of the ring indicate young star-forming regions.
The Sombrero galaxy is located some 28 million light-years away. Viewed from Earth, it is just six degrees south of its equatorial plane. Spitzer detected infrared emission not only from the ring, but from the center of the galaxy too, where there is a huge black hole, believed to be a billion times more massive than our Sun.
The Spitzer picture is composed of four images taken at 3.6 (blue), 4.5 (green), 5.8 (orange), and 8.0 (red) microns. The contribution from starlight (measured at 3.6 microns) has been subtracted from the 5.8 and 8-micron images to enhance the visibility of the dust features.
The Hubble Heritage Team took these observations in May-June 2003 with the space telescope's Advanced Camera for Surveys. Images were taken in three filters (red, green, and blue) to yield a natural-color image. The team took six pictures of the galaxy and then stitched them together to create the final composite image. This magnificent galaxy has a diameter that is nearly one-fifth the diameter of the full Moon.
可见光与红外线的合成图，左下角是可见光图片，右下角是红外图像。
^-^为方便大家打开阅读就不贴大图了，如果想看大图可以下载附件。注:分卷压缩，全部下载后才能解压。大图更炫!
[ 本帖最后由 寻找拉玛 于 2008-3-8 16:30 编辑 ] 震撼，真是太漂亮了，太美了::070821_21.jpg:: X-ray/Optical/Infrared Composite Image
X射线/可见光/红外合成图
[ 本帖最后由 寻找拉玛 于 2008-3-8 15:56 编辑 ] 漂亮，我收藏拉！::070821_09.jpg:: 真的很漂亮，非常感谢！！！！！::070821_13.jpg:: 拉玛兄的海图又上演了。。。。顶。。 好图！
浮在宇宙深空的一张大饼。::42:: 第一张最漂亮::070821_09.jpg:: 好怪的样子……
貌似从侧上方向看它。。。 不是5万光年！
M104是室女座星系团的成员星系，它的质量很大，约为13亿太阳质量。其主体部分的直径为8万光年，暗弱的外围部分可延伸到13万光年的范围
页:
[1]