Tsutsui, Ryo 2012 一个新的标准烛光关系：L_p-T_L-E_p

主要内容:
T_L=E_iso/L_p
说这个关系很致密，可以用作标准烛光关系。

精彩摘抄:

文章信息:

· Find Similar Abstracts (with default settings below)

· arXiv e-print (arXiv:1201.2763)

· References in the Article

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		Improvement of Fundamental Plane of Long Gamma-Ray Bursts with cumulative light curve Morphology
Authors:		Tsutsui, Ryo; Nakamura, Takashi; Yonetoku, Daisuke; Takahashi, Keitaro; Morihara, Yoshiyuki
Publication:		eprint arXiv:1201.2763
Publication Date:		01/2012
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:		10 pages, 7 figures, 2 tables. Submitted to PASJ
Bibliographic Code:		2012arXiv1201.2763T

Abstract

We argue the possibility to improve the statistical significance of fundamental plane of long gamma-ray bursts (LGRBs), which is a correlation between the spectral peak energy $E_{\rm p}$, the luminosity time $T_{\rm L}$ ($\equiv E_{\rm iso}/L_{\rm p}$ where $E_{\rm iso}$ is isotropic energy) and the peak luminosity $L_{\rm p}$, using the morphology of cumulative light curve of the prompt emission. We parametrize the morphology by the absolute deviation from constant luminosity ($ADCL$) and derive the value for 40 LGRBs which have spectropic redshifts, spectral parameters determined by the Band model, 1-second peak fluxes, fluences, and 64 msec resolution light curves whose peak counts are 10 times larger than background fluctuations. We find that the correlations for GRBs with small and large $ADCL$ ($ADCL < 0.17$ and $ADCL > 0.17$, respectively) are statistically more significant compared with one derived from all samples and are given by $L_{\rm p}=10^{52.51\pm 0.02}(E_{\rm p}/10^{2.71}{\rm keV})^{1.86\pm 0.03}(T_{\rm L}/10^{0.86}{\rm sec})^{0.35\pm0.09}$ with $\chi^2_{\nu}=14.87/18$ and $L_{\rm p}=10^{52.93\pm0.04}(E_{\rm p}/10^{2.71}{\rm keV})^{1.76\pm 0.05}(T_{\rm L}/10^{0.86}{\rm sec})^{0.71\pm 0.17}$ with $\chi^2_{\nu}=7.21/9$, respectively. This fact implies the existence of subclasses of LGRBs characterized by the value of $ADCL$. Also there is a hint for the existence of the intermediate-$ADCL$ class which deviates from both fundamental planes. Because both relations are so tight that our result provides a new accurate distance measurement scheme up to the high redshift universe.

---

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)