通過緩解「小尺度危機」，模糊暗物質受更大關注，成為候選暗物質之一。儘管當模糊暗物質的質量小於 10−22 eV時可以大大緩解「小尺度危機」，一些研究表明質量可以提高到 10^−21 eV。天文觀察台The Experiment to Detect the Global Epoch of Reionization Signature (EDGES) 宣布，偵測到對應於紅移z≅17.2，具有99%置信水平的整體二十一公分線吸收信號，整體二十一公分線吸收信號成為約束暗物質的又一支撐工具。為模糊暗物質模型選擇合適的暈質量函數後，結合偵測到的二十一公分線吸收信號的時間，我們總結出模糊暗物質的質量被限制為大於3.45×10−21 eV，具有99%置信水平。它可保留冷暗物質於大尺度時的成功，同時緩解「小尺度危機」。

By alleviating "small-scale crisis", fuzzy dark matter is gaining attention to be one of the dark matter candidates. Although fuzzy dark matter with mass smaller than 10^-22 eV can greatly alleviate the "small-scale crisis", some researches suggested that the mass could be raised to 10^-21 eV. As the Experiment to Detect
the Global Epoch of Reionization Signature (EDGES) announces that a strong
global 21 cm absorption signal corresponding to redshift z ~= 17.2 with 99% confidence level was detected, global 21cm signal be comes another supporting tool
to constrain dark matter model. After selecting a proper halo mass function for
fuzzy dark matter model, combining with the timing of 21cm absorption signal
detected, we conclude that the mass of fuzzy dark matter is constrained to be greater than 3.45 x 10^-21 eV with 99% confidence level, which can still retain the large-scale success of cold dark matter and alleviate the "small-scale crisis" at the same time.

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