Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..380...83l&link_type=abstract
At the Edge of the Universe: Latest Results from the Deepest Astronomical Surveys ASP Conference Series, Vol. 380, proceedings o
Other
1
Scientific paper
We present a study of three high-redshift Lyα emitting galaxies, selected via a narrow-band survey in the GOODS northern field, and spectroscopically confirmed to have redshifts z ˜ 5.7. Using HST ACS and Spitzer IRAC data, we constrain the rest-frame UV-to-optical spectral energy distributions (SEDs) of the galaxies. Fitting stellar population synthesis models to the observed SEDs, we find the galaxies have stellar masses ˜ 10^9 - 1010 M_&sun; and ages ˜ 5 - 100 Myr, assuming a simple starburst star formation history. If a constant star formation rate model is considered, then ages as old as 700 Myr are allowed. A comparison of our narrow-band selected objects to other IRAC-detected z ˜ 6 i'-dropout galaxies reveal similar z' - [3.6] colors and 3.6 μm magnitudes between the two populations, suggesting that they possess stellar populations of similar masses and ages. The observed similarity may be the result of a selection bias, since the IRAC-detected objects only sample the bright end of the luminosity function.
Cowie Lennox L.
Fazio Giacomo
Hu Esther M.
Huang Sheng-Jun
Kakazu Yuko
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