The Intrinsic Statistical Properties and Correlations of Short Gamma-Ray Bursts

作者：Zhu, Si-Yuan; Liu, Zhi-Ying; Shi, Yong-Rui; Ding, Xiao-Kang; Sun, Wan-Peng; Zhang, Fu-Wen^*

来源：Astrophysical Journal, 2023, 950(1): 30.

DOI：10.3847/1538-4357/acc83b

• LUMINOSITY-TIME-CORRELATION
• HUBBLE-SPACE-TELESCOPE
• E-ISO CORRELATION
• X-RAY
• DARK ENERGY
• FUNDAMENTAL PLANE
• SPECTRAL LAGS
• E-P,E-I-E-ISO CORRELATION
• COSMOLOGICAL EVOLUTION
• PEAK LUMINOSITY

The intrinsic statistical properties and correlations of short gamma-ray bursts (SGRBs) have not been fully determined, due to the limitations of observations. In this paper, we compile a more extensive sample of 82 SGRBs with measured redshifts and present a comprehensive study of their intrinsic characteristics. We obtain the median values of the intrinsic duration (T-90,T-z), peak energy (E-p,E-z), isotropic energy (E-iso), and peak luminosity (L-iso) as 0.47 s, 466 keV, 8.21 x 10(50) erg, and 3.22 x 10(51) erg s(-1), respectively. We update the spectrum-energy correlations, and report E-p,E-z alpha E-iso(0.36 +/- 0.05) and E-p,E-z alpha L-iso(0.33 +/- 0.04), which further confirm the previous results that the E-p,E-z-E-iso correlations of SGRBs and long gamma-ray bursts (LGRBs) are different and that this correlation can be used to distinguish GRB types. We report for the first time that there is a tighter correlation between the isotropic energy of the prompt emission of SGRBs and the star formation rate of their host galaxies, which reads sSFR alpha E-iso(0.38 +/- 0.11). Using the measured jet break time (t(jet)) of 11 SGRBs, we tentatively investigate the E-iso-E-p,E-z-t(jet,z) and L-iso-E-p,E-z-t(jet,z) correlations of SGRBs and find that three-parameter correlations of SGRBs also exist and are different from those of LGRBs. Based on the E-iso-E-p,E-z-t(jet),(z) correlation, we estimate the t(jet,z) values of other SGRBs and calculate the opening angles of SGRBs. We find that the median value of the SGRB opening angle is 7 degrees.5, which is larger than that of LGRBs.

• 单位
  桂林理工大学