منابع مشابه
A Local Void and the Accelerating Universe
Corresponding to the recent observational claims that we are in a local void (an underdense region) on scales of 200 − 300 Mpc, the magnitude-redshift relation in a cosmological model with a local void is investigated. It is already evident that the accelerating behavior of high-z supernovae can be explained in this model, because the local void plays a role similar to the positive cosmological...
متن کاملCosmological Observations in a Local Void
A local void in the globally Friedmann-Robertson-Walker (FRW) cosmological model is studied. The inhomogeneity is described using the Lemâıtre-Tolman-Bondi (LTB) solution with the spherically symmetric matter distribution based on the faint galaxies number counts. We investigate the effects this has on the measurement of the Hubble constant and the redshift–luminosity distance relation for mode...
متن کاملTwo mechanisms of ductile fracture: void by void growth versus multiple void interaction
Two distinct mechanisms of crack initiation and advance by void growth have been identified in the literature on the mechanics of ductile fracture. One is the interaction a single void with the crack tip characterizing initiation and the subsequent void by void advance of the tip. This mechanism is represented by the early model of Rice and Johnson and the subsequent more detailed numerical com...
متن کاملVoid Scaling and Void Profiles in CDM Models
Received ABSTRACT An analysis of voids using cosmological N-body simulations of cold dark matter (CDM) models is presented. It employs a robust statistics of voids, that was recently applied to discriminate between data from the Las Campanas Redshift Survey (LCRS) and different cosmological models. Here we extend the analysis to 3D and show that typical void sizes D in the simulated galaxy samp...
متن کاملThe Void in Hydro Ontology
Voids are extremely important to water science, because their size and connectivity determines the storage and flow of water both above and below the ground surface. While previous formal theories about voids strictly consider holes hosted inside objects, we generalize voids to also include spaces between objects, and distinguish voids in macroscopic objects from those occurring microscopically...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1999
ISSN: 0074-1809
DOI: 10.1017/s0074180900132516