Publikationsdatum:
2019-07-12
Beschreibung:
The absence of any continuous Ly-alpha opacity from the intergalactic medium at z = 3-4.5 can be understood if a significant population of star-forming galaxies is present at these redshifts. It is shown that such galaxies can be present within the galaxy populations at B = 22 to 27. The expected ionization produced during galaxy formation is analyzed in terms of highly model-independent metal production arguments and it is concluded that (if such galaxies are dust-free and transparent to ionizing photons) then at least 4(H0/50 km/s Mpc)-cubed percent of galaxy formation would have to have occurred in this redshift range.
Schlagwort(e):
ASTROPHYSICS
Materialart:
Astrophysical Journal, Part 1 (ISSN 0004-637X); 348; 371-377
Format:
text
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