Sub-Mm Line Emission from the First Objects:. Testing the Stellar Feedback

Astronomy and Astrophysics – Astronomy

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Scientific paper

We calculate the expected FIR/sub-mm molecular hydrogen-line emission from the first galactic objects that formed in the universe. Due to their low masses, the stellar feedback from massive stars is able to blow away their gas content and collect it into a cooling shell where H2 rapidly forms and IR rotational lines carry away a large fraction of the explosion energy. The expected fluxes from these sources are in the range 10-1000 μJy. The highest number counts are expected in the 60-80 μm band. Among the planned FIR/sub-mm facilities, we find that the best detection opportunity is with the Multiband Imaging Photometer on SIRTF.

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