First Result for Dark Matter Search by WINERED

The identity of dark matter has been a mystery in astronomy, cosmology, and particle theory for about a century. We present the first dark matter search with a high-dispersion spectrograph by using WINERED at the 6.5 m Magellan Clay telescope to measure the photons from the dark matter decays. The dwarf spheroidal galaxies (dSphs) Leo V and Tucana II are observed by utilizing an object-sky-object nodding observation technique. Employing zero consistent flux data after the sky subtraction and performing Doppler shift analysis for further background subtraction, we have established one of the most stringent limits to date on dark matter lifetime in the mass range of 1.8-2.7 eV. The conservative bound is translated to the photon coupling, g_{ϕγγ} for axionlike par ticles around g_{ϕγγ}≲(2-3)×10^{-11} GeV^{-1} (10^{-10} GeV^{-1}) for the case that ultrafaint dSphs have the Navarro-Frenk-White (generalized Hernquist) dark matter profile.

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Institutions

Publication Details

Journal
Physical Review Letters
Published
2025-02-07
DOI
https://doi.org/10.1103/physrevlett.134.051004
Citations
16
Primary Topic
Dark Matter and Cosmic Phenomena
Type
article
Field-Weighted Citation Impact
29.92

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article

First Result for Dark Matter Search by WINERED

Taiki Bessho, Wen Yin, Shogo Otsubo, Hiroaki Sameshima et al.
16 citations
Physical Review Letters
Dark Matter and Cosmic Phenomena
29.92
article

First Result for Dark Matter Search by WINERED

Taiki Bessho, Wen Yin, Shogo Otsubo, Hiroaki Sameshima, Tomomi Takeuchi, Hitomi Kobayashi, Yuji Ikeda, Hideyo Kawakita, Satoshi Hamano, Daisuke Taniguchi, Yuki Sarugaku, Noriyuki Matsunaga, Haruki Kato
article en
16 citations

Abstract

The identity of dark matter has been a mystery in astronomy, cosmology, and particle theory for about a century. We present the first dark matter search with a high-dispersion spectrograph by using WINERED at the 6.5 m Magellan Clay telescope to measure the photons from the dark matter decays. The dwarf spheroidal galaxies (dSphs) Leo V and Tucana II are observed by utilizing an object-sky-object nodding observation technique. Employing zero consistent flux data after the sky subtraction and performing Doppler shift analysis for further background subtraction, we have established one of the most stringent limits to date on dark matter lifetime in the mass range of 1.8-2.7 eV. The conservative bound is translated to the photon coupling, g_{ϕγγ} for axionlike par ticles around g_{ϕγγ}≲(2-3)×10^{-11} GeV^{-1} (10^{-10} GeV^{-1}) for the case that ultrafaint dSphs have the Navarro-Frenk-White (generalized Hernquist) dark matter profile.

Physical Review LettersVol. 134(5)
Kyoto Sangyo University (JP), Ajinomoto (United States) (US), Tohoku University (JP), National Astronomical Observatory of Japan (JP), Tokyo Metropolitan University (JP), The University of Tokyo (JP)
Ministry of Education, Culture, Sports, Science and Technology, University of Tokyo, Tokyo Metropolitan University, Japan Society for the Promotion of Science, National Institutes of Natural Sciences
Openalex Percentile: Top 0%
Dark Matter and Cosmic Phenomena
29.92
DOISourceOpenAlex
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