Dark Matter and Galaxies Part Ways in Collision between Hefty Galaxy Clusters
chandra_503 March 1st, 2012
Credit: NASA, ESA, CFHT, CXO, M.J. Jee (University of California, Davis), and A. Mahdavi (San Francisco State University)
This composite image shows the distribution of dark matter, galaxies, and hot gas in the core of the merging galaxy cluster Abell 520. Data from Chandra (green) show the hot gas in the clusters and provides evidence that a collision took place. Optical data from Hubble and the Canada-France-Hawaii Telescope in Hawaii are shown in red, green, and blue. Starlight from galaxies within the clusters, which has been smoothed to show the location of most of the galaxies, is colored orange. Confirming a previous observation, this result reveals that a clump of dark matter resides near most of the hot gas, where very few galaxies are found.
Provider: Chandra X-ray Observatory
Image Source: http://chandra.harvard.edu/photo/2012/a520/
Curator: Chandra X-ray Observatory, Cambridge, MA, USA
Image Use Policy: http://chandra.harvard.edu/photo/image_use.html
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Full Size Image
(3600 x 2315)
JPG (1.52 MB) Source File
Image Details
Distance
Position Details
Color Mapping
| Telescope | Spectral Band | Wavelength | |
|---|---|---|---|
|
Hubble (WFPC2) | Near-Infrared (F814W) | 814.0 nm |
|
CFHT (MEGAPRIME) | Optical (R-band) | 616.0 nm |
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CFHT (MEGAPRIME) | Optical (G-band) | 468.0 nm |
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Chandra (ACIS) | X-ray | 826.7 pm |
| Diffuse Blue and Orange components of the image correspond to lensing map (mass) and luminosity measurements | |||
- ID
- 503
- Subject Category
- C.5.5.3
- Subject Name
- Abell 520
- Credits
- NASA, ESA, CFHT, CXO, M.J. Jee (University of California, Davis), and A. Mahdavi (San Francisco State University)
- Release Date
- 2012-03-01
- Lightyears
- 2,400,000,000
- Redshift
- 0.201
- Reference Url
- http://chandra.harvard.edu/photo/2012/a520/
- Type
- Observation
- Image Quality
- Good
- Distance Notes
- Facility
- Hubble, CFHT, CFHT, Chandra
- Instrument
- WFPC2, MEGAPRIME, MEGAPRIME, ACIS
- Color Assignment
- Red, Green, Blue, Green
- Band
- Near-Infrared, Optical, Optical, X-ray
- Bandpass
- F814W, R-band, G-band, -
- Central Wavelength
- 814, 616, 468, 0.8267
- Start Time
- Integration Time
- Dataset ID
- Notes
- D
- Coordinate Frame
- ICRS
- Equinox
- J2000
- Reference Value
- 73.5435621, 2.9148898
- Reference Dimension
- 3600.0, 2315.0
- Reference Pixel
- 1801.0, 1158.5
- Scale
- 3.90783e-05, 3.9078343e-05
- Rotation
- 57.35
- Coordinate System Projection:
- TAN
- Quality
- Full
- FITS Header
- Notes
- WCS retrieved using CXCs PinpointWCS
- Creator (Curator)
- Chandra X-ray Observatory
- URL
- http://chandra.harvard.edu
- Name
- Chandra X-ray Observatory Center
- cxcpub@cfa.harvard.edu
- Telephone
- 617.496.7941
- Address
- 60 Garden St.
- City
- Cambridge
- State/Province
- MA
- Postal Code
- 02138
- Country
- USA
- Rights
- http://chandra.harvard.edu/photo/image_use.html
- Publisher
- Chandra X-Ray Observatory Center
- Publisher ID
- chandra
- Resource ID
- a520.tif
- Resource URL
- http://chandra.harvard.edu/photo/2012/a520/a520.tif
- Related Resources
- Metadata Date
- 2013-09-20
- Metadata Version
- 1.2
Detailed color mapping information coming soon...
