Can the lack of symmetry in the {ital COBE} DMR maps constrain the topology of the universe?
- Lawrence Berkeley Laboratory, Space Sciences Laboratory, and Center for Particle Astrophysics, Building 50-205, University of California, Berkeley, Berkeley, California 94720 (United States)
- Russian Academy of Sciences and Landau Institute for Theoretical Physics, Kosygina Street 2, Moscow 117334 (Russia)
Although the cubic {ital T}{sup 3} {open_quote}{open_quote}small universe{close_quote}{close_quote} has been ruled out by COBE Differential Microwave Radiometer (DMR) results as an interesting cosmological model, we still have the possibility of living in a universe with a more anisotropic topology, such as a rectangular {ital T}{sup 3} {open_quote}{open_quote}small universe{close_quote}{close_quote} with one or two of its dimensions significantly smaller than the present horizon (which we refer to as {ital T}{sup 1} and {ital T}{sup 2} models, respectively). In order to rule out these anisotropic topologies as well, we apply a new data analysis method that searches for the specific kind of symmetries that these models should produce. We find that the 4 year COBE DMR data place a lower limit on the smallest cell size for {ital T}{sup 1} and {ital T}{sup 2} models of 3000 {ital h}{sup {minus}1} Mpc, at 95{percent} confidence, for a scale-invariant power spectrum ({ital n}=1). These results imply that {ital all} toroidal universes (cubes and rectangles) are ruled out as interesting cosmological models. {copyright} {ital 1996 The American Astronomical Society.}
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 388937
- Journal Information:
- Astrophysical Journal, Vol. 468, Issue 2; Other Information: PBD: Sep 1996
- Country of Publication:
- United States
- Language:
- English
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