Astronomers Take the Measure of Dark Matter in universe

Chandra_172_1024

chandra_172 September 6th, 2001

Credit: X-ray: NASA/IOTA/S.Allen et al. Optical: HST

In this montage, Chandra's large scale X-ray images (left) show hot gas filling the two giant galaxy clusters, while Hubble's smaller scale optical images (right) show the distribution of galaxies in the central regions of the same clusters. The Chandra data provides a detailed temperature map for the hot gas and allows astronomers to precisely determine the total masses of the clusters. Most of the mass is in the form of dark matter. The Hubble data place independent constraints on the masses of the clusters that confirm the Chandra results.

Provider: Chandra X-ray Observatory

Image Source: http://chandra.harvard.edu/photo/2001/clusters/

Curator: Chandra X-ray Observatory, Cambridge, MA, USA

Image Use Policy: http://chandra.harvard.edu/photo/image_use.html

View Options

Image Details

Image Type
Collage
Object Name
Abell 2390 MS2137.3-2353
Subject - Distant Universe
Galaxy > Grouping > Cluster

Distance

Universescale3
2,500,000,000 light years

Position Details

Position (ICRS)
RA = 21h 53m 36.3s
DEC = 17° 41’ 32.7”
Constellation
Pegasus

Color Mapping

  Telescope Spectral Band Wavelength
Red Chandra (ACIS) X-ray (X-ray) -
Yellow Chandra (ACIS) X-ray (X-ray) -
Red Chandra (ACIS) X-ray (X-ray) -
Yellow Chandra (ACIS) X-ray (X-ray) -
Pseudocolor Hubble (WFPC2) Optical (Wide R) 702.0 nm
Pseudocolor Hubble (WFPC2) Optical (WFPC2 I) 814.0 nm
Spectrum_xray1w
Pseudocolor
Pseudocolor
Chandra_172_1280
×
ID
172
Subject Category
D.5.5.3  
Subject Name
Abell 2390, MS2137.3-2353
Credits
X-ray: NASA/IOTA/S.Allen et al. Optical: HST
Release Date
2001-09-06
Lightyears
2,500,000,000
Redshift
2,500,000,000
Reference Url
http://chandra.harvard.edu/photo/2001/clusters/
Type
Collage
Image Quality
Good
Distance Notes
Facility
Chandra, Chandra, Chandra, Chandra, HST, HST
Instrument
ACIS, ACIS, ACIS, ACIS, WFPC2, WFPC2
Color Assignment
red, yellow, red, yellow, pseudocolor, pseudocolor
Band
X-ray, X-ray, X-ray, X-ray, Optical, Optical
Bandpass
X-ray, X-ray, X-ray, X-ray, Wide R, WFPC2 I
Central Wavelength
-, -, -, -, 702, 814
Start Time
1999-11-05T17:01:44, 1999-11-05T17:01:44, 1999-11-18T08:38:40, 1999-11-18T08:38:40, 1995-05-30T20:22:17, 1994-12-10T04:33:17
Integration Time
9160, 9160, 44170, 44170, 11100, 10500
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
328.4012472, 17.6924212
Reference Dimension
Reference Pixel
Scale
Rotation
Coordinate System Projection:
TAN
Quality
Position
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
Email
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 Center
Publisher ID
chandra
Resource ID
cluster_montage.tif
Metadata Date
2012-07-27T16:15:19-04:00
Metadata Version
1.2
×

 

Detailed color mapping information coming soon...

×
Universescalefull
2,500,000,000 light years

Providers | Sign In