The X-ray luminosity function of short gamma-ray bursts
| Autor: | Si-Yuan Zhu, Zhi-Ying Liu, Fu-Wen Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena X-ray Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Rest frame 01 natural sciences Power law Cosmology Luminosity Space and Planetary Science 0103 physical sciences High Energy Physics::Experiment Gamma-ray burst 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Fermi Gamma-ray Space Telescope Luminosity function (astronomy) |
| Zdroj: | Astrophysics and Space Science. 366 |
| ISSN: | 1572-946X 0004-640X |
| Popis: | We present for the first time the X-ray luminosity function of short gamma-ray bursts (sGRBs) estimated from 22 Fermi sGRBs. We find that the cumulative distribution of X-ray emission at rest frame 200 s is well described by a broken power law function, which is $\phi (L_{\mathrm{X,0}})\propto L_{\mathrm{X,0}}^{-0.20\pm 0.04}$ for dim bursts and $\phi (L_{\mathrm{X,0}})\propto L_{\mathrm{X,0}}^{-1.05\pm 0.11}$ for bright bursts, with the break luminosity is $2.57\times 10^{46}~\mbox{erg}\,\mbox{s}^{-1}$ , where the cosmological evolution of luminosity is taken into account. We also find that the early X-ray luminosity of sGRBs is correlated with the isotropic energy/luminosity of prompt emission. These results are need to confirm with large observed data of sGRBs. |
| Databáze: | OpenAIRE |
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