Searching for axion-like particle decay in the near-infrared background: an 
updated analysis

Caputo, Andrea; Vittino, Andrea; Fornengo, Nicolao; Regis, Marco; Taoso, Marco

Lokale TagsFreigabegeschichteDetailsÜbersicht

Searching for axion-like particle decay in the near-infrared background: an updated analysis

Caputo, A., Vittino, A., Fornengo, N., Regis, M., & Taoso, M. (2021). Searching for axion-like particle decay in the near-infrared background: an updated analysis. Journal of Cosmology and Astroparticle Physics, 05, 046. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2020-232.

Item is Freigegeben

einblenden: alle ausblenden: alle

Basisdaten

einblenden: ausblenden:

Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-000A-1B06-2 Versions-Permalink: https://hdl.handle.net/21.11116/0000-000A-1B07-1

Genre: Zeitschriftenartikel

ausblenden:

Urheber:
Caputo, Andrea¹, Autor
Vittino, Andrea¹, Autor
Fornengo, Nicolao¹, Autor
Regis, Marco¹, Autor
Taoso, Marco¹, Autor

Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650

Inhalt

einblenden:

ausblenden:

Schlagwörter: Astroparticle Physics

Zusammenfassung: The extragalactic background light is comprised of the cumulative radiation from all galaxies across the history of the universe. The angular power spectrum of the anisotropies of such a background at near-infrared (IR) frequencies lacks of a complete understanding and shows a robust excess which cannot be easily explained with known sources. Dark matter in the form of axion-like particles (ALPs) with a mass around the electronvolt will decay into two photons with wavelengths in the near-IR band, possibly contributing to the background intensity. We compute the near-IR background angular power spectrum including emissions from galaxies, as well as the contributions from the intra-halo light and ALP decay, and compare it to measurements from the Hubble Space Telescope and Spitzer. We find that the preferred values for the ALP mass and ALP-photon coupling to explain the excess are in tension with star cooling data and observations of dwarf spheroidal galaxies.