File:Abell 1795- A Cooling Flow In Galaxy Cluster Abell 1795 (2000-0163 - 0163 xray).tiff
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[edit]DescriptionAbell 1795- A Cooling Flow In Galaxy Cluster Abell 1795 (2000-0163 - 0163 xray).tiff |
English: Like a spoon moving through hot soup, the massive elliptical galaxy near the top of this image has cut a swath across the dense, hot gas in this crowded galaxy cluster known as Abell 1795. This smoothed Chandra X-ray Observatory image of the galaxy cluster A1795 shows a bright filament some 200,000 light years in length. The gas in this structure is denser and cooler (30 million compared to 50 million degrees) than the surrounding gas. The filament was most likely caused when an enormous elliptical galaxy (white spot at the head of the filament) moved through the cluster core. Hot gas spread throughout the cluster is drawn by the gravitational field of the giant galaxy into a cosmic wake of cooling gas, which appears as the long string-like feature in the middle of this image. Most observed galaxies in the universe appear in groups ranging from simple pairs and trios to complex clusters of thousands. Scientists find these clusters immersed in haloes of hot gas. Through time, this "intracluster" gas loses energy through X-ray radiation, cools, and flows toward the dense core of a cluster where it may form stars. This phenomenon is known as a "cooling flow." The latest Chandra research on Abell 1795 was conducted by a team led by Professor Andrew Fabian of the Institute of Astronomy, Cambridge, England, using the Advanced CCD Imaging Spectrometer (ACIS) instrument aboard Chandra. Chandra observed Abell 1795 for 19,594 seconds on December 20, 1999, and then for 19,421 seconds on March 21, 2000. |
Date | 4 December 2000 (upload date) |
Source | Abell 1795: A Cooling Flow In Galaxy Cluster Abell 1795 |
Author | NASA/IoA/AC Fabian et al. |
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Category InfoField | Groups & Clusters of Galaxies |
Color Code InfoField | Intensity |
Constellation InfoField | Boötes |
Coordinates (J2000) InfoField | RA 13h 48m 52.70s |
Observation Date(s) InfoField | December 20, 1999 and March 21, 2000 |
Observation ID(s) InfoField | 493, 494 |
Observation Time InfoField | 27 hours |
Scale InfoField | Image is 75 arcsec across. |
Instruments InfoField | ACIS |
This media is a product of the Chandra X-ray Observatory Credit and attribution belongs to the Chandra X-ray Center, NASA/SAO/Penn State University/MIT |
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[edit]Public domainPublic domainfalsefalse |
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.) | ||
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current | 12:43, 23 June 2024 | 2,179 × 2,171 (352 KB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://chandra.si.edu/photo/2000/0163/0163_xray.tif via Commons:Spacemedia |
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Image title | Chandra has found a "cool" filament of gas in the galaxy cluster Abell 1795. This structure is some 200,000 light years long (the long string-like feature in the middle of this image). The gas in the filament has a temperature of about 30 million degrees Celsius, cooler than the surrounding gas in the cluster. As the gas in the cluster core radiates away its energy, it drifts toward regions where gravity is strongest. The enormous elliptical galaxy located at the head of the filament could have pulled the gas inward into its wake as it passed through the core of the cluster and created the filament. |
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Author | Chandra X-ray Observatory Center |
Copyright holder | http://chandra.harvard.edu/photo/image_use.html |
Width | 2,179 px |
Height | 2,171 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 40 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS3 Macintosh |
File change date and time | 00:42, 5 March 2008 |
Color space | Uncalibrated |
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439cf97a0a538dd898acd58e76fc7d7b78f7df45
4 December 2000
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