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This series of deep images shows the small field surrounding the brightest SCUBA galaxy (CUDSS 14.1) in this study at six wavelengths. From left to right, these images were taken at, first, R band using the Subaru telescope, then 3.6, 4.5, 5.8, and 8.0 microns using IRAC, and finally at 24 microns using MIPS. The circle shows the area searched for potential counterparts to the SCUBA galaxy. At 3.6 and 4.5 microns there are multiple candidates. At visible wavelengths, the SCUBA galaxy is invisible -- presumably because it is screened by thick clouds of dust generated by the very rapid star formation ongoing within it. But at long wavelengths there is only one candidate -- a strong source of emission at 5.8, 8.0 and 24.0 microns easily detected by Spitzer. This demonstrates how foreground galaxies, such as the bright object just left of bottom center in the R-band image, fade from view toward ever-longer wavelengths. This underlines the benefits of Spitzer observations for the continuing study of these enigmatic, high-redshift galaxies.
|Date||31 March 2006|
|Author||NASA/JPL-Caltech/M. Ashby (Harvard-Smithsonian CfA)|
(Reusing this file)
see http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=sig06-007 High quality tif files also avaliable.
|This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
|Orientation of image||1|
|Image resolution in width direction||72|
|Image resolution in height direction||72|
|Unit of X and Y resolution||2|
|Color space information||65535|
|Exif image width||800|
|Exif image length||131|
|Software used||Adobe Photoshop CS2 Macintosh|
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