TY - JOUR

T1 - Graviton to Photon Conversion in Curved Space-Time and External Magnetic Field

AU - Dolgov, Alexander D.

AU - Panasenko, Lyubov A.

AU - Bochko, Vladimir A.

N1 - The work was supported by the RSF grant number 23-42-00066.

PY - 2024/1

Y1 - 2024/1

N2 - The suppression of relic gravitational waves due to their conversion into electromagnetic radiation in a cosmological magnetic field is studied. The coupled system of equations describing gravitational and electromagnetic wave propagation in an arbitrary curved space-time and in external magnetic field is derived. The subsequent elimination of photons from the beam due to their interaction with the primary plasma is taken into account. The resulting system of equations is solved numerically in the Friedman–LeMaitre–Robertson–Walker metric for the upper limit of the intergalactic magnetic field strength of 1 nGs. We conclude that the gravitational wave conversion into photons in the intergalactic magnetic field cannot significantly change the amplitude of the relic gravitational wave and their frequency spectrum.

AB - The suppression of relic gravitational waves due to their conversion into electromagnetic radiation in a cosmological magnetic field is studied. The coupled system of equations describing gravitational and electromagnetic wave propagation in an arbitrary curved space-time and in external magnetic field is derived. The subsequent elimination of photons from the beam due to their interaction with the primary plasma is taken into account. The resulting system of equations is solved numerically in the Friedman–LeMaitre–Robertson–Walker metric for the upper limit of the intergalactic magnetic field strength of 1 nGs. We conclude that the gravitational wave conversion into photons in the intergalactic magnetic field cannot significantly change the amplitude of the relic gravitational wave and their frequency spectrum.

KW - Friedman–LeMaitre–Robertson–Walker space-time

KW - Heisenberg–Euler action

KW - cosmological magnetic field

KW - curved space-time

KW - expanding universe

KW - gravitational wave conversion

KW - gravitational waves

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85183186482&origin=inward&txGid=b95d5eac973138cb72af9b74f92dec8f

UR - https://www.mendeley.com/catalogue/49b0c24f-f440-3b55-bad8-e172cd42e35c/

U2 - 10.3390/universe10010007

DO - 10.3390/universe10010007

M3 - Article

VL - 10

JO - Universe

JF - Universe

SN - 2218-1997

IS - 1

M1 - 7

ER -