A search for the global cosmic string

Details A search for the global cosmic string A search for the global cosmic string

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....4.1492m&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

A cosmic string is a topological defect thought to be made during a phase transition in the early universe. It is predicted by elementary particle theory and cosmology. It is also a good candidate for the origin of extremely high energy (> 1020 eV) cosmic rays (EHECRs). A search for cosmic strings was carried out using the Sloan Digital Sky Survey (SDSS) data, which is obtained using an optical telescope. Characteristic double images of galaxies are expected to be produced by cosmic strings due to gravity. However, we could not detect any signatures of global cosmic strings. An upper limit to the number of global cosmic strings within the GZK horizon (< 100 Mpc), N<1.1 with 95% confidence level, was derived.

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