Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...484..985h&link_type=abstract
Astrophysical Journal v.484, p.985
Astronomy and Astrophysics
Astronomy
43
Errata, Addenda
Scientific paper
In the paper "Destruction of Molecular Hydrogen during Cosmological Reionization" by Zoltan Haiman, Martin J. Rees, and Abraham Loeb (ApJ, 476, 458 [1997]), Figure 3 is incorrect. Because of a typographical error in the chemistry routine, the ionization profiles and the derived shielding masses were calculated for densities lower than the stated values. As a result, the shielding masses shown in Figures 3a and 3b are artificially high. Figure 1 below shows the corrected version of Figure 3a; the extent of the correction to Figure 3b is similar. Although the correction substantially reduces the shielding masses, the original claim in the paper---that H2 is universally destroyed in objects with virial temperatures below Tvir = 104 K long before the universe is reionized---remains valid. The baryonic mass corresponding to 104 K in the spherical top-hat collapse model is M4 = 107 M&sun;( Omega b/0.1)(h/0.5)-1[(1 + zvir)/10]-3/2, while the value of J21 necessary to ionize the universe (i.e., the radiation density corresponding to one photon per baryon) is J^{*}21 = 80( Omega bh2/0.025)[(1 + z)/25]3. In all cases shown in the corrected figure, the shielding masses at J^{*}21 still exceed the value of M4 by several orders of magnitude. The authors would like to thank Richard B. Larson for his comment that led to the correction of this error.
Haiman Zoltan
Loeb Abraham
Rees Martin J.
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