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Cited by 708

The DOI matches its Crossref record; 16 of the 16 references it cites were found in a registry or an index.

Effect of Reionization on Structure Formation in the Universe

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Gnedin, Nickolay Y.·2000·The Astrophysical Journal
DOI 10.1086/317042
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Abstract

I use simulations of cosmological reionization to quantify the effect of photoionization on the gas fraction in low-mass objects, in particular the characteristic mass scale below which the gas fraction is reduced compared to the universal value. I show that this characteristic scale can be up to an order of magnitude lower than the linear-theory Jeans mass, and that even if one defines the Jeans mass at a higher overdensity, it does not track the evolution of this characteristic suppression mass. Instead, the filtering mass, which corresponds directly to the scale over which baryonic perturbations are smoothed in linear perturbation theory, provides a remarkably good fit to the characteristic mass scale. Thus, it appears that the effect of reionization on structure formation in both the linear and nonlinear regimes is described by a single characteristic scale, the filtering scale of baryonic perturbations. In contrast to the Jeans mass, the filtering mass depends on the full thermal history of the gas instead of the instantaneous value of the sound speed, so it accounts for the finite time required for pressure to influence the gas distribution in the expanding universe. In addition to the characteristic suppression mass, I study the full shape of the probability distribution to find an object with a given gas mass among all the objects with the same total mass, and I show that the numerical results can be described by a simple fitting formula that again depends only on the filtering mass. This simple description of the probability distribution may be useful for semianalytical modeling of structure formation in the early universe.

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Metadata

Authors
Gnedin, N. Y.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2000-10-20
Volume
542
Issue
2
Pages
535-541
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/317042
OpenAlex
W2101058963
Cited by
708
References
16
FWCI
13.59
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Effect of Reionization on Structure Formation in the Universe. https://app.cochat.ai/papers/10.1086/317042
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Gnedin, N. Y. (2000). Effect of Reionization on Structure Formation in the Universe. The Astrophysical Journal. https://doi.org/10.1086/317042

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