dc.contributor.author | Dvorkin, Cora | |
dc.contributor.author | Wyman, Robert | |
dc.contributor.author | Hu, Wayne | |
dc.date.accessioned | 2020-04-06T19:54:16Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Dvorkin, Cora, Mark Wyman, and Wayne Hu. 2011. Cosmic String Constraints from WMAP and the South Pole Telescope Data. Phys. Rev. D 84, no. 12. | en_US |
dc.identifier.issn | 1550-7998 | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:42656556 | * |
dc.description.abstract | The predictions of the inflationary LCDM paradigm match today's high-precision measurements of the cosmic microwave background anisotropy extremely well. The same data put tight limits on other sources of anisotropy. Cosmic strings are a particularly interesting alternate source to constrain. Strings are topological defects, remnants of inflationary-era physics that persist after the big bang. They are formed in a variety of models of inflation, including string theory models such as brane inflation. We assume a "Nambu-Goto" model for strings, approximated by a collection of unconnected segments with zero width, and show that measurements of temperature anisotropy by the South Pole Telescope break a parameter degeneracy in the WMAP data, permitting us to place a strong upper limit on the possible string contribution to the CMB anisotropy: the power sourced by zero-width strings must be <1.75% (95% CL) of the total or the string tension Gmu <1.7x10^{-7}. These limits imply that the best hope for detecting strings in the CMB will come from B-mode polarization measurements at arcminute scales rather than the degree scale measurements pursued for gravitational wave detection. | en_US |
dc.description.sponsorship | Physics | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | American Physical Society (APS) | en_US |
dc.relation.isversionof | doi:10.1103/PhysRevD.84.123519 | en_US |
dash.license | OAP | |
dc.title | Cosmic String Constraints From WMAP and the South Pole Telescope Data | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Accepted Manuscript | en_US |
dc.relation.journal | Physical Review D | en_US |
dash.depositing.author | Dvorkin, Cora | |
dc.date.available | 2020-04-06T19:54:16Z | |
dc.identifier.doi | 10.1103/PhysRevD.84.123519 | * |
dash.contributor.affiliated | Wyman, Robert | |
dash.contributor.affiliated | Dvorkin, Cora | |