Interacting Galaxy Pair Arp 65
Sig05 005

Credit: NASA/JPL-Caltech/M. L. Giroux (East Tennesee State University)

Observation • June 9th, 2005 • sig05-005

sig05-005

High resolution images from NASA's Spitzer infrared telescope and GALEX ultraviolet telescope show the difference in the distribution of young and old stars in the Arp 65 pair of interacting galaxies. In the short-wavelength infrared at 3.6 microns (first image), cool old stars are bright, so the beautiful grand design spiral patterns in the old stellar disks are visible. In contrast, at longer infrared wavelengths, at 8 microns, bright clumps of young stars are detected (second image). The difference in distribution between the old and young stellar populations is clear in the third image, where the 3.6 micron (blue) and 8.0 micron (red) images are combined. This clumpy structure is also present in the ultraviolet, as revealed in the GALEX ultraviolet images (fourth image, with near-ultraviolet in yellow and far-ultraviolet in blue).

These images were presented at the American Astronomical Society meeting in Minneapolis, Minnesota, on May 30, 2005.

About the Object

Name
Arp 65NGC 90NGC 93
Type
Galaxy > Type > Interacting
Galaxy > Grouping > Pair
Distance
221,000,000 Light Years
Redshift
0.017856

Color Mapping

Band Wavelength Telescope
Infrared 3.6 µm Spitzer IRAC
Infrared 4.5 µm Spitzer IRAC
Infrared 8.0 µm Spitzer IRAC

Astrometrics

Position (J2000)
RA =0h 21m 54.0s
Dec = 22° 22' 60.0"
Field of View
0.0 x 0.0 arcminutes
Orientation
North is up