File:Abell 2597.jpg

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DescriptionAbell 2597.jpg	English: The Chandra image of Abell 2597 revealed a vast cloud of hot gas with two dark cavities - upper left and lower right - about 100,000 light years from the bright center of the cluster. These so-called ghost cavities are thought to be 100 million-year-old relics of an ancient eruption that originated around a supermassive black hole in the core of a centrally located galaxy. Though dim, the cavities contain a mixture of very hot gas, high-energy particles, and magnetic fields - otherwise they would have collapsed under the pressure of the surrounding hot gas. If dozens of these cavities were created over the life of the cluster, they could explain the surprisingly strong magnetic field of the multimillion degree Celsius gas that pervades the cluster.
Date	28 July 2000
Source	https://flic.kr/p/5tVRim (http://chandra.harvard.edu/photo/2002/1269/)
Author	NASA/CXC/Ohio U/B.McNamara et al.

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	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

This image was originally posted to Flickr by Smithsonian Institution at https://flickr.com/photos/25053835@N03/2941479242. It was reviewed on 2017-08-03 20:42:40 by FlickreviewR, who found it to be licensed under the terms of the No known copyright restrictions, which is compatible with the Commons. It is, however, not the same license as given above, and it is unknown whether that license ever was valid.

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current	11:49, 3 August 2014		2,400 × 2,400 (284 KB)	Numéro 1963 (talk \| contribs)	User created page with UploadWizard

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- Abell 2597
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- Astronomie : précipitations cosmiques
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- Q19631710

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Image title	The Chandra image of Abell 2597 revealed a vast cloud of hot gas with two dark cavities - upper left and lower right - about 100,000 light years from the bright center of the cluster. These so-called ghost cavities are thought to be 100 million-year-old relics of an ancient eruption that originated around a supermassive black hole in the core of a centrally located galaxy. Though dim, the cavities contain a mixture of very hot gas, high-energy particles, and magnetic fields - otherwise they would have collapsed under the pressure of the surrounding hot gas. If dozens of these cavities were created over the life of the cluster, they could explain the surprisingly strong magnetic field of the multimillion degree Celsius gas that pervades the cluster.
Author	Chandra X-ray Observatory Center
Copyright holder	http://chandra.harvard.edu/photo/image_use.html
Headline	A cluster of galaxies about a billion light years from Earth, located in the constellation Aquarius.
Credit/Provider	NASA/CXC/Ohio U/B.McNamara et al
Source	Chandra X-ray Observatory
Online copyright statement
Usage terms	http://chandra.harvard.edu/photo/image_use.html
Date and time of data generation	8 January 2002
Width	2,400 px
Height	2,400 px
Bits per component	8 8 8
Compression scheme	LZW
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Data arrangement	chunky format
Software used	Adobe Photoshop CS3 Macintosh
File change date and time	10:28, 30 September 2008
Color space	Uncalibrated
Image width	2,400 px
Image height	2,400 px
Exif version	2.21
Date and time of digitizing	06:28, 30 September 2008
Date metadata was last modified	14:39, 8 October 2008
Keywords	Abell 2597
Contact information	cxcpub@cfa.harvard.edu http://chandra.harvard.edu 60 Garden st. Cambridge, MA, 02138 USA 617.496.7941
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File:Abell 2597.jpg

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