"Russian Doll" Galaxy Clusters Reveal Information About Dark Energy

Chandra_626a_1024

chandra_626a April 28th, 2016

Credit: X-ray: NASA/CXC/Univ. of Alabama/A. Morandi et al; Optical: SDSS, NASA/STScI

These four galaxy clusters were part of a large survey of over 300 clusters used to investigate dark energy, the mysterious energy that is currently driving the accelerating expansion of the Universe. In these composite images, X-rays from Chandra (purple) have been combined with optical light from Hubble and Sloan Digital Sky Survey (red, green, and blue). Researchers used a novel technique that takes advantage of the observation that the outer reaches of galaxy clusters, the largest structures in the universe held together by gravity, show similarity in their X-ray emission profiles and sizes.

Provider: Chandra X-ray Observatory

Image Source: http://chandra.harvard.edu/photo/2016/clusters/

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

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

Image Details

Image Type
Observation
Object Name
Abell 1835
Subject - Distant Universe
Galaxy > Grouping > Cluster

Distance

Universescale3
3,000,000,000 light years
Chandra_626a_128
 

Position Details

Position (ICRS)
RA = 14h 1m 1.9s
DEC = 2° 52’ 41.7”
Orientation
North is 0.3° CCW
Field of View
3.1 x 3.1 arcminutes
Constellation
Virgo

Color Mapping

  Telescope Spectral Band Wavelength
Purple Chandra (ACIS) X-ray (X-ray) 826.7 pm
Blue SDSS Optical (G-band) 468.6 nm
Green SDSS Optical (R-band) 616.5 nm
Red SDSS Optical (I-band) 748.1 nm
Grayscale Hubble (ACS) Optical (Z-band) 850.0 nm
Spectrum_xray1
Purple
Blue
Green
Red
Grayscale
Chandra_626a_1280
×
ID
626a
Subject Category
D.5.5.3  
Subject Name
Abell 1835
Credits
X-ray: NASA/CXC/Univ. of Alabama/A. Morandi et al; Optical: SDSS, NASA/STScI
Release Date
2016-04-28
Lightyears
3,000,000,000
Redshift
0.253
Reference Url
http://chandra.harvard.edu/photo/2016/clusters/
Type
Observation
Image Quality
Good
Distance Notes
Facility
Chandra, SDSS, SDSS, SDSS, Hubble
Instrument
ACIS, -, -, -, ACS
Color Assignment
Purple, Blue, Green, Red, Grayscale
Band
X-ray, Optical, Optical, Optical, Optical
Bandpass
X-ray, G-band, R-band, I-band, Z-band
Central Wavelength
0.8267, 468.6, 616.5, 748.1, 850
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
210.2579348, 2.8782473
Reference Dimension
3600.0, 3600.0
Reference Pixel
1801.0, 1801.0
Scale
1.41327e-05, 1.4132701e-05
Rotation
0.33
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
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 Observatory Center
Publisher ID
chandra
Resource ID
clusters_a1835.tif
Metadata Date
2016-04-28T13:53:14-04:00
Metadata Version
1.2
×

 

Detailed color mapping information coming soon...

×
Universescalefull
3,000,000,000 light years

Providers | Sign In