Long GRBs as a tool to investigate star formation in dark matter halos
| Autor: | Ye-Fei Yuan, Jun-Jie Wei, Xue-Feng Wu, Jing-Meng Hao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics 010308 nuclear & particles physics Star formation Dark matter FOS: Physical sciences Astronomy Astronomy and Astrophysics Astrophysics Astrophysics - Astrophysics of Galaxies 01 natural sciences Redshift Luminosity Dark matter halo Stars Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Galaxy formation and evolution Halo Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics |
| Zdroj: | Journal of High Energy Astrophysics. :1-8 |
| ISSN: | 2214-4048 |
| DOI: | 10.1016/j.jheap.2015.11.001 |
| Popis: | First stars can only form in structures that are suitably dense, which can be parametrized by the minimum dark matter halo mass $M_{\rm min}$. $M_{\rm min}$ must plays an important role in star formation. The connection of long gamma-ray bursts (LGRBs) with the collapse of massive stars has provided a good opportunity for probing star formation in dark matter halos. We place some constraints on $M_{\rm min}$ using the latest $Swift$ LGRB data. We conservatively consider that LGRB rate is proportional to the cosmic star formation rate (CSFR) and an additional evolution parametrized as $(1+z)^{\alpha}$, where the CSFR model as a function of $M_{\rm min}$. Using the $\chi^{2}$ statistic, the contour constraints on the $M_{\rm min}$--$\alpha$ plane show that at the $1\sigma$ confidence level, we have $M_{\rm min}1.8\times10^{51}$ erg $\rm s^{-1}$. We also find that adding 12 high-\emph{z} $(43.1\times10^{51}$ erg $\rm s^{-1}$) could result in much tighter constraints on $M_{\rm min}$, for which, $10^{7.7}\rm M_{\odot} Comment: 23 pages, 6 figures, 1 table, accepted by Journal of High Energy Astrophysics |
| Databáze: | OpenAIRE |
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