2005MNRAS.362..213B

Query : 2005MNRAS.362..213B

2005MNRAS.362..213B - Mon. Not. R. Astron. Soc., 362, 213-228 (2005/September-1)

Formation of voids in the Universe within the Lemaitre-Tolman model.

BOLEJKO K., KRASINSKI A. and HELLABY C.

Abstract (from CDS):

We develop models of void formation starting from a small initial fluctuation at recombination and growing to a realistic present-day density profile in agreement with observations of voids. The model construction is an extension of previously developed algorithms for finding a Lemaître-Tolman metric that evolves between two profiles of either density or velocity specified at two times. Of the four profiles of concern (those of density and velocity at recombination and at the present day), two can be specified and the other two follow from the derived model.

We find that, in order to reproduce the present-day void density profiles, the initial velocity profile is more important than the initial density profile.

Extrapolation of current cosmic microwave background (CMB) observations to the scales relevant to protovoids is very uncertain. Even so, we find that it is very difficult to make both the initial density and velocity fluctuation amplitudes small enough and still obtain a realistic void by today.

Abstract Copyright: 2005 RAS

Journal keyword(s): cosmic microwave background - cosmological parameters - cosmology: theory - early Universe - large-scale structure of Universe

Simbad objects: 4

Full paper

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Number of rows : 4

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Sp type	#ref 1850 - 2026	#notes
1	NAME SGP	reg	00 51 26.275	-27 07 41.70	~	606	0
2	NAME Virgo Cluster	ClG	12 30 47.8	+12 23 07	~	7107	0
3	NAME NGP	reg	12 51 26.275	+27 07 41.70	~	1274	0
4	ACO 1656	ClG	12 59 44.40	+27 54 44.9	~	5141	2

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