Polarimetry with POLAR

Kole, Merlin

doi:10.22323/1.306.0068

Cited by 2 publications

(2 citation statements)

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“…In addition, the photon flux induced by GeV DM has a plateau shape extending to sub-GeV energies, though the degree of polarization drops to 10%. This polarized low-energy γ-ray signal may be of interest to current X-ray telescopes such as the POLAR satellite, which is a X-ray polarimeter sensitive to an energy up to 0.5 MeV with a 10% MDP [33]. In addition, the Advanced Energetic Pair Telescope (AdEPT [34]) and the time projection chamber as a gamma-ray telescope and polarimeter (HARPO [35]) have been proposed to study the photon polarization at few percent level for the sub-GeV energy range.…”

Section: Discussionmentioning

confidence: 99%

Polarized gamma rays from dark matter annihilations

Huang

2018

Physics Letters B

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In this paper, we explore the possibility of a linearly polarized gamma-ray signal from dark matter annihilations in the Galactic center. Considering neutral weakly interacting massive particles, a polarized gamma-ray signal can be realized by a two-component dark matter model of Majorana fermions with an anapole moment. We discuss the spin alignment of such dark matter fermions in the Galactic center and then estimate the intensity and the polarizability of the final-state electromagnetic radiation in the dark matter annihilations. For low-mass dark matter, the photon flux at sub-GeV energies may be polarized at a level detectable in current X-ray polarimeters.Depending on the mass ratio between the final-state fermion and DM, the degree of polarization at the mass threshold can reach 70% or even higher, providing us with a new tool for probing the nature of dark matter in future gamma-ray polarization experiments.

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Section: Discussionmentioning

confidence: 99%

Polarized gamma rays from dark matter annihilations

Huang

2018

Physics Letters B

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“…Additionally, we are currently working on a Bayesian approach to get posterior on PD and PA, this allows to give deviation and upper/lower limits more precisely. POLAR-2, as a following experiment of POALR, has already been selected to be launched on the China Space Station around 2024, and it is now being constructed [8,9]. Our previous work has estimated the detection of Crab pulsar with POLAR-2 [3].…”

Section: Figurementioning

confidence: 99%

Polarization measurements of the Crab Pulsar with POLAR

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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Polarimetry with POLAR

Cited by 2 publications

References 8 publications

Polarized gamma rays from dark matter annihilations

Polarized gamma rays from dark matter annihilations

Polarization measurements of the Crab Pulsar with POLAR

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