Constraining eV-scale axion-like particle dark matter: insights from the M87 Galaxy

IF 5.9 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-30 DOI:10.1088/1475-7516/2025/05/100

Arpan Kar, Sourov Roy, Pratick Sarkar

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Abstract

Axion-like particles (ALPs) can account for the observed dark matter (DM) of the Universe and if their masses are at the eV scale, they can decay into infrared, optical and ultraviolet photons with a decay lifetime larger than the age of the Universe. We analyze multi-wavelength data obtained from the central region of Messier 87 (M87) galaxy by several telescopes, such as, Swift, Astrosat, Kanata, Spitzer and International Ultraviolet Explorer in the infrared to ultraviolet frequencies (∼ 2 × 10¹⁴ Hz - 3 × 10¹⁵ Hz), to constrain the narrow emission lines indicative of the eV scale ALP DM decay. We derive constraints on the ALP coupling to two photons (g_aγγ ) for ALP mass range 2 eV ≲ m_a ≲ 20 eV, assuming ALPs form the DM in the M87 halo. We find that our bounds on ALP-two-photon coupling can become stronger than the existing ones by an order of magnitude in the ALP mass range 8 eV ≲ m_a ≲ 20 eV.

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约束ev尺度轴子样粒子暗物质：来自M87星系的见解

类轴子粒子（ALPs）可以解释宇宙中观测到的暗物质（DM），如果它们的质量在eV尺度上，它们可以衰变成红外、光学和紫外线光子，其衰变寿命比宇宙的年龄还要长。我们分析了几架望远镜，如Swift， Astrosat, Kanata， Spitzer和国际紫外探测器在红外到紫外频率（~ 2 × 1014 Hz - 3 × 1015 Hz）从M87星系中心区域获得的多波长数据，以约束指示eV尺度ALP DM衰变的窄发射线。假设ALP形成了M87光晕中的DM，我们推导了ALP与两个光子（ga - γγ）耦合的约束条件，其质量范围为2 eV > ma > 20 eV。我们发现我们的alp -双光子耦合的边界可以在alp质量范围8 eV > ma > 20 eV内比现有的更强一个数量级。

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来源期刊

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.