Production of dust by massive stars at high redshift |
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| Authors: | C Gall J Hjorth A C Andersen |
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| Institution: | 1. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100, Copenhagen, Denmark
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| Abstract: | The large amounts of dust detected in sub-millimeter galaxies and quasars at high redshift pose a challenge to galaxy formation
models and theories of cosmic dust formation. At z>6 only stars of relatively high mass (>3 M⊙) are sufficiently short-lived to be potential stellar sources of dust. This review is devoted to identifying and quantifying
the most important stellar channels of rapid dust formation. We ascertain the dust production efficiency of stars in the mass
range 3–40 M⊙ using both observed and theoretical dust yields of evolved massive stars and supernovae (SNe) and provide analytical expressions
for the dust production efficiencies in various scenarios. We also address the strong sensitivity of the total dust productivity
to the initial mass function. From simple considerations, we find that, in the early Universe, high-mass (>3 M⊙) asymptotic giant branch stars can only be dominant dust producers if SNe generate ≲3×10−3 M⊙ of dust whereas SNe prevail if they are more efficient. We address the challenges in inferring dust masses and star-formation
rates from observations of high-redshift galaxies. We conclude that significant SN dust production at high redshift is likely
required to reproduce current dust mass estimates, possibly coupled with rapid dust grain growth in the interstellar medium. |
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