Galaxy Evolution in the Northern HDF |
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Authors: | Rodger I Thompson |
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Institution: | (1) Steward Observatory, University of Arizona, USA |
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Abstract: | The history of star formation in the Northern Hubble Deep Field is probed using a combination of optical and near infrared
images taken with WFPC2 and NICMOS on the Hubble Space Telescope. These images cover more than a factor of five in wavelength.
This broad wavelength coverage allows accurate photometric determinations of redshift, extinction and intrinsic spectral energy
distribution for each galaxy. From these parameters the star formation rate for each galaxy is determined by relating the
1500 angstrom flux to the net star formation rate. We then correct the rates at high redshift for the effects of surface brightness
dimming by using a standard form of the star formation intensity distribution. Our measurements show that the star formation
rate in the Northern HDF is roughly constant from a redshift of 1 through 6.
This revised version was published online in September 2006 with corrections to the Cover Date. |
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Keywords: | galaxy evolution star formation |
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