Macrolensing signatures of large-scale violations of the weak energy condition

Citation
M. Safonova et al., Macrolensing signatures of large-scale violations of the weak energy condition, MOD PHY L A, 16(3), 2001, pp. 153-162
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
MODERN PHYSICS LETTERS A
ISSN journal
0217-7323 → ACNP
Volume
16
Issue
3
Year of publication
2001
Pages
153 - 162
Database
ISI
SICI code
0217-7323(20010130)16:3<153:MSOLVO>2.0.ZU;2-#
Abstract
We present a set of simulations of the macrolensing effects produced by lar ge-scale cosmological violations of the energy conditions. These simulation s show how the appearance of a background field of galaxies is affected whe n lensed by a region with an energy density equivalent to a negative mass r anging from 10(12) to 10(17) \M-circle dot\. We compare with the macrolensi ng results of equal amounts of positive mass, and show that, contrary to th e usual case where tangential are-like structures are expected, there appea r radial arcs - runaway filaments - and a central void. These results make the cosmological macrolensing produced by space-time domains where the weak energy conditions are violated, observationally distinguishable from stand ard regions. Whether large domains with negative energy density indeed exis t in the universe can now be decided by future observations of deep fields.