REVIEW 4 cited by
Constraining gravitational-wave backgrounds from conversions into photons in the Galactic magnetic field
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
abstract
High-frequency gravitational waves ($f \gtrsim 1$ MHz) may provide a unique signature for the existence of exotic physics. The lack of current and future gravitational-wave experiments sensitive at those frequencies leads to the need of employing different indirect techniques. Notably, one of the most promising one is constituted by graviton-photon conversions in magnetic fields. In this work, we focus on conversions of a gravitational-wave background into photons inside the Milky-Way magnetic field, taking into account the state-of-the-art models for both regular and turbulent components. We discuss how graviton-to-photon conversions may lead to imprints in the cosmic photon background spectrum in the range of frequencies $f\sim10^{9}-10^{26}\,$Hz, where the observed photon flux is widely explained by astrophysics emission models. Hence, the absence of any significant evidence for a diffuse photon flux induced by graviton-photon conversions allows us to set stringent constraints on the gravitational-wave strain $h_c$, strengthening current astrophysical bounds by $\sim1-2$ orders of magnitude in the whole range of frequencies considered.
Forward citations
Cited by 4 Pith papers
-
X-ray signals converted from high-frequency gravitational waves emitted by spinning light primordial black hole dark matter
Superradiant gravitational waves from light primordial black holes can convert into X-ray photons in the Galactic magnetic field, making the PBH dark-matter scenario testable with future X-ray observatories.
-
Constraints on High-Frequency Gravitational Waves from Graviton-Photon Conversion in the M87 Galaxy
Graviton–photon conversion in M87's magnetic field sets h_c and Ωgw h² limits 1–5 orders of magnitude tighter than Milky Way-based bounds across 10^10–10^27 Hz.
-
Graviton Photoproduction by a Kerr-Newman Black Hole with Worldline EFT
The graviton-to-photon conversion amplitude for a Kerr-Newman black hole is computed through O(S^2) in the long-wavelength worldline EFT and shown to be fully determined by the black hole's electromagnetic and mass mu...
-
Gravitational Wave Detection With Plasma Haloscopes
A full analysis of gravitational wave detection in plasma haloscopes shows anisotropic wire arrays lose sensitivity at high frequency, while isotropic arrays recover it.
Discussion (0). Continue with ORCID to comment.