The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.
The fragmentation of pre-enriched primordial objects
Open accessAbstract
Recent theoretical investigations have suggested that the formation of the very first stars, forming out of metal-free gas, was fundamentally different from the present-day case. The question then arises which effect was responsible for this transition in the star formation properties. In this paper, we study the effect of metallicity on the evolution of the gas in a collapsing dark matter mini-halo. We model such a system as an isolated 3σ peak of mass 2 × 106M⊙ that collapses at zcoll ≃ 30, using smoothed particle hydrodynamics. The gas has a supposed level of pre-enrichment of either Z = 10−4 Z⊙ or 10−3 Z⊙. We assume that H2 has been radiatively destroyed by the presence of a soft UV background. Metals therefore provide the only viable cooling at temperatures below 104 K. We find that the evolution proceeds very differently for the two cases. The gas in the lower metallicity simulation fails to undergo continued collapse and fragmentation, whereas the gas in the higher metallicity case dissipatively settles into the centre of the dark matter halo. The central gas, characterized by densities nH ≳ 104 cm−3, and a temperature, T ≃ 90 K, that closely follows that of the cosmic microwave background, is gravitationally unstable and undergoes vigorous fragmentation. We discuss the physical reason for the existence of a critical metallicity, Zcrit ∼ 5 × 10 −4 Z⊙, and its possible dependence on redshift. Compared with the pure H/He case, the fragmentation of the Z = −3 Z⊙ gas leads to a larger relative number of low-mass clumps.
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Cites
Principles of physical cosmology
(1993) · Choice Reviews Online · doi:10.5860/choice.31-1499 · Cited by 2,675
In the beginning: the first sources of light and the reionization of the universe
Barkana, R., & Loeb, A. (2001) · Physics Reports · doi:10.1016/s0370-1573(01)00019-9 · Cited by 1,386
TREESPH - A unification of SPH with the hierarchical tree method
Hernquist, L., & Katz, N. (1989) · The Astrophysical Journal Supplement Series · doi:10.1086/191344 · Cited by 1,010
Massive Black Holes as Population III Remnants
Madau, P., & Rees, M. J. (2001) · The Astrophysical Journal · doi:10.1086/319848 · Cited by 953
Rees, M. J., & Ostriker, J. P. (1977) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/179.4.541 · Cited by 923
The neutral atomic phases of the interstellar medium
Wolfire, M. G., Hollenbach, D., McKee, C. F., Tielens, A. G. G. M., & Bakes, E. L. O. (1995) · The Astrophysical Journal · doi:10.1086/175510 · Cited by 920
How Small Were the First Cosmological Objects?
Tegmark, M., Silk, J., Rees, M. J., Blanchard, A., Abel, T., & Palla, F. (1997) · The Astrophysical Journal · doi:10.1086/303434 · Cited by 876
Structure formation in the universe
Padmanabhan, Τ. (1993) · CERN Document Server (European Organization for Nuclear Research) · Cited by 814
Forming the First Stars in the Universe: The Fragmentation of Primordial Gas
Bromm, V., Coppi, P. S., & Larson, R. B. (1999) · The Astrophysical Journal · doi:10.1086/312385 · Cited by 581
Self-citationResolution requirements for smoothed particle hydrodynamics calculations with self-gravity
Bate, M. R., & Burkert, A. (1997) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/288.4.1060 · Cited by 563
Cited by
First stars V - Abundance patterns from C to Zn and supernova yields in the early Galaxy
Cayrel, R., Depagne, E., Spite, M., Hill, V., Spite, F., François, P., Plez, B., Beers, T., Primas, F., Andersen, J., et al. (2004) · Astronomy & Astrophysics · doi:10.1051/0004-6361:20034074 · Cited by 1,154
Bromm, V., & Larson, R. B. (2004) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.42.053102.134034 · Cited by 957
Self-citationA stellar relic from the early Milky Way
Christlieb, N., Bessell, M. S., Beers, T. C., Gustafsson, B., Korn, A., Barklem, P. S., Karlsson, T., Mizuno–Wiedner, M., & Rossi, S. (2002) · Nature · doi:10.1038/nature01142 · Cited by 527
Bromm, V., & Yoshida, N. (2011) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081710-102608 · Cited by 512
Self-citationTHE BIRTH OF A GALAXY: PRIMORDIAL METAL ENRICHMENT AND STELLAR POPULATIONS
Wise, J. H., Turk, M. J., Norman, M. L., & Abel, T. (2012) · The Astrophysical Journal · doi:10.1088/0004-637x/745/1/50 · Cited by 462
Metadata
- Authors
- Bromm, V., Ferrara, A., Coppi, P. S., & Larson, R. B.
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2001-12
- Volume
- 328
- Issue
- 3
- Pages
- 969-976
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2029047760
- Cited by
- 414
- References
- 27
- FWCI
- 18.12
- Type
- journal article
- Language
- en
- Open access
- green
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