# Gravitational waves from kinks on infinite cosmic strings 

Masahiro Kawasaki ( a,b $^{)}$, Koichi Miyamoto( a ) and Kazunori Nakayama ( a ) 

$^{a}$Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan 

$^{b}$Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8568, Japan 

(Dated: October 29, 2018) 

## Abstract 

Gravitational waves emitted by kinks on infinite strings are investigated using detailed estima- tions of the kink distribution on infinite strings. We find that gravitational waves from kinks can be detected by future pulsar timing experiments such as SKA for an appropriate value of the the string tension, if the typical size of string loops is much smaller than the horizon at their formation. Moreover, the gravitational wave spectrum depends on the thermal history of the Universe and 

hence it can be used as a probe into the early evolution of the Universe. 

