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News Release Archive:

News Release 223 of 938

March 12, 2009 09:00 AM (EDT)

News Release Number: STScI-2009-11

Hubble Provides New Evidence for Dark Matter Around Small Galaxies

Technical facts about this news release:

About the Object
Object Name
and Position:
[CGW2003] J031931.7+4131 03 19 31.7
+41 31 21
[CGW2003] J031910.4+4129 03 19 10.4
+41 29 37
[CGW2003] J031900.4+4129 03 19 00.4
+41 29 02
[CGW2003] J031905.2+4134 03 19 05.2
+41 34 48
Description: Dwarf Galaxies in the Perseus Cluster
Constellation: Perseus
Distance: 250 million light-years (77 megaparsecs)
Dimensions: Each individual galaxy image is 25 arcseconds (30,000 light-years or 9,200 parsecs) wide.
About the Data
Science Team:

This image was created from HST data from proposal 10210: C. Conselice (University of Nottingham, U.K.), S. De Rijcke (University of Ghent, Belgium), and E. Held (Astronomical Observatory of Padua, Italy).

The science team comprises S. Penny and C. Conselice (University of Nottingham, U.K.), S. De Rijcke (University of Ghent, Belgium), and E. Held (Astronomical Observatory of Padua, Italy).

Instrument: ACS/WFC
Exposure Date(s): January and February 2005
Exposure Time: 13 hours
Filters: F555W (V) and F814W (I)
About the Release
Release Credit: NASA, ESA, and C. Conselice (University of Nottingham)
Release Date: March 12, 2009
Color: The image is a composite of separate exposures made by the ACS instrument on the Hubble Space Telescope. Two filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:
F814W (I) yellow
F555W (V) blue
Orientation/Scale: