2001
DOI: 10.1051/0004-6361:20010656
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Star formation losses due to tidal debris in "hierarchical" galaxy formation

Abstract: Abstract. N-body studies have previously shown that the bottom-up hierarchical formation of dark matter haloes is not as monotonic as implicitly assumed in the Press-Schechter formalism. During and following halo mergers, matter can be ejected into tidal tails, shells or low density "atmospheres" outside of the successor haloes' virialisation radii (or group-finder outermost radii). The implications that the possible truncation of star formation in this tidal "debris" may have for observational galaxy statisti… Show more

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Cited by 3 publications
(2 citation statements)
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“…Estimates of the virialisation fraction are implied by these calculations, e.g. Table 6 in [51]. Here, the N -body simulations used are Virgo Consortium 256 3 -particle T 3 (3-torus) simulations [22,23] 2 for an EdS-CDM model with h = 0.5, and normalization in the mean density fluctuation σ 8 = 0.51 at 8h −1 Mpc, where the Hubble constant, i.e.…”
Section: The Virialisation Approximationmentioning
confidence: 99%
“…Estimates of the virialisation fraction are implied by these calculations, e.g. Table 6 in [51]. Here, the N -body simulations used are Virgo Consortium 256 3 -particle T 3 (3-torus) simulations [22,23] 2 for an EdS-CDM model with h = 0.5, and normalization in the mean density fluctuation σ 8 = 0.51 at 8h −1 Mpc, where the Hubble constant, i.e.…”
Section: The Virialisation Approximationmentioning
confidence: 99%
“…The results above indicate that with appropriate targetting and choices of observational parameter limits, the speed with which the T 3 candidate for the topology of the Universe can be rejected or detected can be optimised. For more specific observational strategies for particular telescope/instrument combinations, more detailed analyses could potentially be carried out by using detailed galaxy formation models, such as the hybrid N-body/semi-analytic simulations (Roukema et al 1993(Roukema et al , 1997(Roukema et al , 2001 that have been extensively developed to simulate detailed galaxy properties as a function of space and time (e.g., Hatton et al 2003, and references thereof), including a specific focus on LAEs (e.g., Garel et al 2012). More sophisticated combinations of existing observations, including the VVDS 1400+05 field within 16 • of the same southern axis and the VVDS 0226−04 field within 20 • of the corresponding northern axis (Table 4) along with simulated future observations, should also potentially yield several alternative strategies for topological lensing detection or rejection.…”
Section: Discussionmentioning
confidence: 99%