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March 14, 2011 04:30 PM (EDT)

News Release Number: STScI-2011-08

NASA's Hubble Rules Out One Alternative to Dark Energy

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Technical facts about this news release:

About the Object
Object Name: NGC 5584
Object Description: Spiral Galaxy
Position (J2000): R.A. 14h 22m 23s.81
Dec. -00° 23' 14".82
Constellation: Virgo
Distance: About 72 million light-years (22 million parsecs)
Dimensions: The image is 2.4 arcminutes (50,000 light-years or 15,000 parsecs) wide.
About the Data
Note: Hubble data of NGC 5584 taken with WFC3/IR filters, along with numerous other galaxies, were used in these science results.
Data Description:

The image was created from Hubble data from proposal 11570: A. Riess (STScI/JHU), L. Macri (Texas A&M University), C. Kochanek and K. Stanek (Ohio State University), A. Filippenko and W. Li (University of California, Berkeley), S. Casertano and H. Ferguson (STScI), and L. Greenhill (Harvard-Smithsonian Center for Astrophysics).

The science team comprises: A. Riess (STScI/JHU), L. Macri (Texas A&M University), S. Casertano (STScI), H. Lampeitl (University of Portsmouth, UK), H. Ferguson (STScI), A. Filippenko (University of California, Berkeley), S. Jha (Rutgers University), W. Li (University of California, Berkeley), and R. Chornock (Harvard-Smithsonian Center for Astrophysics).
Instrument: WFC3/UVIS
Exposure Date(s): January-April, 2010
Exposure Time: 20.8 hours
Filters: F350LP (Long Pass), F555W (V), and F814W (I)
About the Release
Credit: NASA, ESA, A. Riess (STScI/JHU), L. Macri (Texas A&M University), and the Hubble Heritage Team (STScI/AURA)
Release Date: March 14, 2011
Color This image is a composite of separate exposures acquired by the WFC3 instrument on HST. Several filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:
F350LP (Long Pass) white
F555W (V) blue
F814W (I) orange
Orientation/Scale: Compass and Scale Image of NGC 5584
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