File:NGC 5775.jpg
![File:NGC 5775.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/42/NGC_5775.jpg/579px-NGC_5775.jpg?20110509144029)
原始文件 (3,859 × 3,996像素,文件大小:7.75 MB,MIME类型:image/jpeg)
说明
说明
摘要
[编辑]描述NGC 5775.jpg |
English: This NASA/ESA Hubble Space Telescope image shows the edge-on profile of the slender spiral galaxy NGC 5775. Although the spiral is tilted away from us, with only a thin slither on view, such a perspective can be advantageous for astronomers because the regions above and below the galaxy’s disc can be seen much more clearly.
For instance, astronomers have previously used the high inclination of this spiral to study the properties of the halo of hot gas that is visible when the galaxy is observed at X-ray wavelengths. The mechanism behind such haloes is unclear, but they are found around spirals that have a high star formation rate, like NGC 5775. Some astronomers think that hot gas from the disc is driven into the halo by supernova explosions, which is then returned to the disc as it cools — like a massive galactic fountain. Meanwhile, there is further disruption taking place in the disc of NGC 5775, as it is in the early stages of a galactic merger. Astronomers have observed bridges of hydrogen gas connecting this edge-on galaxy with a neighbouring face-on spiral (NGC 5774). But neither galaxy yet features a tidal tail — a disrupted stream of gas and stars that extends into space — which are commonplace in strongly interacting pairs, such as the Antennae Galaxies. NGC 5775 and 5774 are members of the Virgo Cluster and lie at a distance of about 85 million light-years. This colour picture was created from images taken using the Wide Field Channel of Hubble’s Advanced Camera for Surveys. Images through a red filter (F625W) were coloured blue and images through a filter that isolates the glow from hydrogen gas (F658N) have been coloured red. The exposure times were 2292 s and 6848 s, respectively, and the field of view is 3.2 arcminutes across. |
||||
日期 | |||||
来源 | http://www.spacetelescope.org/images/potw1119a/ | ||||
作者 | ESA/Hubble & NASA | ||||
授权 (二次使用本文件) |
|
许可协议
[编辑]![w:zh:知识共享](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![署名](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
- 您可以自由地:
- 共享 – 复制、发行并传播本作品
- 修改 – 改编作品
- 惟须遵守下列条件:
- 署名 – 您必须对作品进行署名,提供授权条款的链接,并说明是否对原始内容进行了更改。您可以用任何合理的方式来署名,但不得以任何方式表明许可人认可您或您的使用。
文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2011年5月9日 (一) 14:40 | ![]() | 3,859 × 3,996(7.75 MB) | Jmencisom(留言 | 贡献) | {{Information |Description ={{en|1=This NASA/ESA Hubble Space Telescope image shows the edge-on profile of the slender spiral galaxy NGC 5775. Although the spiral is tilted away from us, with only a thin slither on view, such a perspective can be advan |
您不可以覆盖此文件。
文件用途
没有页面使用本文件。
全域文件用途
以下其他wiki使用此文件:
- ar.wikipedia.org上的用途
- en.wikipedia.org上的用途
- fa.wikipedia.org上的用途
- it.wikipedia.org上的用途
- it.wikibooks.org上的用途
- pl.wikipedia.org上的用途
- tr.wikipedia.org上的用途
- zh.wikipedia.org上的用途
元数据
此文件含有额外信息,这些信息可能是创建或数字化该文件时使用的数码相机或扫描仪所添加的。如果文件已从其原始状态修改,某些详细信息可能无法完全反映修改后的文件。
_error | 0 |
---|