FOR RELEASE: 9:20 AM CDT May 30, 2005
North is up and east is to the left on these images.
The field of view is 3 arcminutes.
These Spitzer images were presented at the American Astronomical
Society meeting in Minneapolis, Minnesota, on May 30, 2005.
A journal article with a detailed analysis of these maps has
been submitted to the Astronomical Journal.
This research has been sponsored by NASA.
Contact: Beverly Smith, East Tennessee State University,
Department of Physics, Astronomy, and Geology, (423) 439-8418,
smithbj@etsu.edu
PHOTO CREDIT: NASA/JPL-Caltech/B. J. Smith, C. Struck, P. N. Appleton, V. Charmandaris and W. Reach.
NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the Spitzer
Space Telescope mission for NASA's Science Mission Directorate,
Washington, D.C. Science operations are conducted at the Spitzer Science
Center, California Institute of Technology, Pasadena, Calif. JPL is a
division of Caltech.
Click
here for tif image.
NASA's Spitzer telescope's sensitive infrared detectors map out faint
regions of new star formation in this pair of colliding galaxies
known as Arp 107. Like a beautiful pearl necklace, young star clusters
have formed along the ring-like tidal arm in this system. Spitzer
images at 8 microns (second picture above)
provide a clear view of these clumps of young
stars. In contrast, in the shorter wavelength 3.6 micron band (first
picture), the older stars in the small companion to the northeast and the
bridge connecting the two galaxies are bright. The color-coded
multi-band picture (third picture; red=8.0 microns, blue=3.6 microns)
emphasizes this difference in stellar ages.