Gravitational scattering of photons off cosmic strings

Yi Zen Chu, Tanmay Vachaspati

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Photons can gravitationally scatter off a cosmic string loop and gain or lose energy. We consider the spectral distortion induced by cosmic string loops placed in an ambient thermal bath of photons. The fractional deviation from a thermal spectrum caused by cosmic strings is estimated to scale as (G Nμ)2z2, where GN is Newton's constant, μ is the string tension, and z is the cosmological redshift after which spectral distortions can survive. This effect is large enough to potentially be of observational interest.

Original languageEnglish (US)
Article number083512
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number8
DOIs
StatePublished - Apr 10 2013

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strings
photons
scattering
newton
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deviation
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Gravitational scattering of photons off cosmic strings. / Chu, Yi Zen; Vachaspati, Tanmay.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 87, No. 8, 083512, 10.04.2013.

Research output: Contribution to journalArticle

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