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File:NGC3254 - HST - Potw2124a.jpg

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原始文件 (3,644 × 3,081像素,文件大小:5.55 MB,MIME类型:image/jpeg


摘要

描述
English: A Galactic Powerhouse

This image shows the spiral galaxy NGC 3254, observed using Hubble's Wide Field Camera 3 (WFC3). WFC3 has the capacity to observe ultraviolet, visible and near-infrared light, and this image is a composite of observations taken in the visible and infrared. In this image, NGC 3254 looks like a typical spiral galaxy, viewed side-on. However, NGC 3254 has a fascinating secret that it is hiding in plain sight — it is a Seyfert galaxy, meaning that it has an extraordinarily active core, known as an active galactic nucleus, which releases as much energy as the rest of the galaxy put together.

Seyfert galaxies are not rare — about 10% of all galaxies are thought to be Seyfert galaxies. They belong to the class of “active galaxies” — galaxies that have supermassive black holes at their centres that are actively accreting material, which releases vast amounts of radiation as it is accreted. There is a second, far more active, type of active galaxy that is known as a quasar. The active cores of Seyfert galaxies, such as NGC 3254, are brightest when observed in light outside the visible spectrum. At other wavelengths, this image would look very different, with the galaxy’s core shining extremely brightly.

Credit:

ESA/Hubble & NASA, A. Riess et al.


Coordinates
Position (RA):  	10 29 23.83
Position (Dec): 	29° 30' 6.70"
Field of view:  	2.41 x 2.03 arcminutes
Orientation:    	North is 7.3° left of vertical

Colours & filters Band	Wavelength	Telescope
Optical Long pass   	350 nm   	Hubble Space Telescope WFC3
Optical V           	555 nm   	Hubble Space Telescope WFC3
Optical I           	814 nm   	Hubble Space Telescope WFC3
Infrared H          	1.6 μm   	Hubble Space Telescope WFC3
.
日期 14 June 2021, 06:00(Release)
来源 https://esahubble.org/images/potw2124a/
作者

Credit:

ESA/Hubble & NASA, A. Riess et al.

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当前2021年6月16日 (三) 04:172021年6月16日 (三) 04:17版本的缩略图3,644 × 3,081(5.55 MB)Fabian RRRR== {{int:filedesc}} == {{Information |description={{en|1=A Galactic Powerhouse This image shows the spiral galaxy NGC 3254, observed using Hubble's Wide Field Camera 3 (WFC3). WFC3 has the capacity to observe ultraviolet, visible and near-infrared light, and this image is a composite of observations taken in the visible and infrared. In this image, NGC 3254 looks like a typical spiral galaxy, viewed side-on. However, NGC 3254 has a fascinating secret that it is hiding in plain sight — it is...

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