article published yes R. S. de Souza author A. Mesinger author A. Ferrara author Zoltán Haiman author 7c006e8c-cc0d-11ee-8322-cb904ef76f36 R. Perna author N. Yoshida author Structures in Warm Dark Matter (WDM) models are exponentially suppressed below a certain scale, characterized by the dark matter particle mass, mx. Since structures form hierarchically, the presence of collapsed objects at high-redshifts can set strong lower limits on mx. We place robust constraints on mx using recent results from the {\it Swift} database of high-redshift gamma-ray bursts (GRBs). We parameterize the redshift evolution of the ratio between the cosmic GRB rate and star formation rate (SFR) as ∝(1+z)α, thereby allowing astrophysical uncertainties to partially mimic the cosmological suppression of structures in WDM models. Using a maximum likelihood estimator on two different z>4 GRB subsamples (including two bursts at z>8), we constrain mx≳1.6-1.8 keV at 95% C.L., when marginalized over a flat prior in α. We further estimate that 5 years of a SVOM-like mission would tighten these constraints to mx≳2.3 keV. Our results show that GRBs are a powerful probe of high-redshift structures, providing robust and competitive constraints on mx. Oxford University Press2013 eng 0035-8711 1365-296610.1093/mnras/stt674 43243218-3227 yes R.S. de Souza, A. Mesinger, A. Ferrara, Z. Haiman, R. Perna, N. Yoshida, Monthly Notices of the Royal Astronomical Society 432 (2013) 3218–3227. Souza, R. S. de, A. Mesinger, A. Ferrara, Zoltán Haiman, R. Perna, and N. Yoshida. “Constraints on Warm Dark Matter Models from High-Redshift Long Gamma-Ray Bursts.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2013. <a href="https://doi.org/10.1093/mnras/stt674">https://doi.org/10.1093/mnras/stt674</a>. de Souza, R. S., Mesinger, A., Ferrara, A., Haiman, Z., Perna, R., &#38; Yoshida, N. (2013). Constraints on warm dark matter models from high-redshift long gamma-ray bursts. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href="https://doi.org/10.1093/mnras/stt674">https://doi.org/10.1093/mnras/stt674</a> de Souza RS, Mesinger A, Ferrara A, Haiman Z, Perna R, Yoshida N. 2013. Constraints on warm dark matter models from high-redshift long gamma-ray bursts. Monthly Notices of the Royal Astronomical Society. 432(4), 3218–3227. de Souza RS, Mesinger A, Ferrara A, Haiman Z, Perna R, Yoshida N. Constraints on warm dark matter models from high-redshift long gamma-ray bursts. <i>Monthly Notices of the Royal Astronomical Society</i>. 2013;432(4):3218-3227. doi:<a href="https://doi.org/10.1093/mnras/stt674">10.1093/mnras/stt674</a> de Souza, R. S., et al. “Constraints on Warm Dark Matter Models from High-Redshift Long Gamma-Ray Bursts.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 432, no. 4, Oxford University Press, 2013, pp. 3218–27, doi:<a href="https://doi.org/10.1093/mnras/stt674">10.1093/mnras/stt674</a>. R. S. de Souza, A. Mesinger, A. Ferrara, Z. Haiman, R. Perna, and N. Yoshida, “Constraints on warm dark matter models from high-redshift long gamma-ray bursts,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 432, no. 4. Oxford University Press, pp. 3218–3227, 2013. 176462024-09-06T07:25:13Z2024-09-24T12:40:52Z