Searching for axion-like particle decay in the near-infrared background: An updated analysis
Journal of Cosmology and Astroparticle Physics, ISSN: 1475-7516, Vol: 2021, Issue: 5
2021
- 13Citations
- 10Captures
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Article Description
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.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85107033289&origin=inward; http://dx.doi.org/10.1088/1475-7516/2021/05/046; https://iopscience.iop.org/article/10.1088/1475-7516/2021/05/046; https://dx.doi.org/10.1088/1475-7516/2021/05/046; https://validate.perfdrive.com/fb803c746e9148689b3984a31fccd902/?ssa=246eb11a-ea18-4a2b-b4c6-4687c0463802&ssb=76394225960&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.1088%2F1475-7516%2F2021%2F05%2F046&ssi=efd21f70-8427-4b25-83b4-973f191ae7a3&ssk=support@shieldsquare.com&ssm=886578827066843851207818136172942225&ssn=f51e9c13064a8e4960e865d27f448c10cb20e7e44089-5b4c-4bba-949560&sso=98a5280e-62ddb6055d9616d0b109e227e11d4740ea3c9ff01c24673b&ssp=72955620781722166263172247705942097&ssq=07156072137282398177196580842677048782982&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssu=&ssv=&ssw=&ssx=eyJyZCI6ImlvcC5vcmciLCJ1em14IjoiN2Y5MDAwNWZlYjYxNzctOTJlZC00ZjU2LThmZTEtNTk5ZDljOTJjNDE1NC0xNzIyMTk2NTgwNDk0MjI0NzkxNzgxLWExNjY2NjcyZTVmOGNmODAxMjA3NTQiLCJfX3V6bWYiOiI3ZjYwMDA3NmNmYmIwZC1hOTY5LTQwMjItYWM3My04NjU0NDg0NTczMTgxNzIyMTk2NTgwNDk0MjI0NzkxNzgxLTU0N2IyNjUzN2NkOGMyNmIxMjA3NjMifQ==
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