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Lehner, N., O’Meara, J.M., Fox, A.J., Howk, J.C., Prochaska, J.X., Burns, V., et al. (2014) Galactic and Circumgalactic O Vi and Its Impact on the Cosmological Metal and Baryon Budgets AT 2 < z ≲ 3.5. The Astrophysical Journal, 788, Article 119.
https://doi.org/10.1088/0004-637x/788/2/119

has been cited by the following article:

• TITLE: Study of Warm Dark Matter with the Lyman-α Forest

  AUTHORS: Bruce Hoeneisen

  KEYWORDS: Lyman-α Forest, Warm Dark Matter, Free Streaming, Dark Matter

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.16 No.3, July 20, 2026

  ABSTRACT: Quasar light becomes absorbed by the Lyman-α line of neutral hydrogen in “clouds” along the line-of-sight in the highly ionized intergalactic medium after re-ionization. The received flux spectrum is known as the “Lyman-α forest”. Limits on the dark matter “standard thermal relic mass” have been obtained in the literature from the power spectrum of the Lyman-α forest, e.g. m th >5.7 keV. These limits are in tension with four independent estimates of the dark matter warmness: 0.6≲ m th ≲1.6 keV. To try to understand this tension we attempt to measure the dark matter warmness by two methods: the power spectrum of the Lyman-α forest, and the width of individual absorption lines, e.g. “Lyman-α trees”. We obtain a measurement of the dark matter warmness with the Lyman-α forest power spectrum, in agreement with the four independent estimates. In conclusion, the warm dark matter free-streaming is clearly observed as a cut-off of the Lyman-α forest power spectrum.