主要内容:
利用相同红移处的光度距离应该相同，用超新星的数据来校正伽玛暴的标准烛光关系。（好像前两天也有人做了类似的事）
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文章信息:
- · arXiv e-print (arXiv:0802.4262)
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| Title: |
| A Cosmology Independent Calibration of GRB Luminosity Relations and the Hubble Diagram |
| Authors: |
| Liang, Nan; Xiao, Wei Ke; Liu, Yuan; Zhang, Shuang Nan |
| Publication: |
| eprint arXiv:0802.4262 |
| Publication Date: |
| 02/2008 |
| Origin: |
| ARXIV |
| Keywords: |
| Astrophysics |
| Comment: |
| 10 pages, 2 figure. ApJL submitted |
| Bibliographic Code: |
| 2008arXiv0802.4262L |
Abstract
An important issue related to the application of Gamma-Ray Bursts (GRBs) to cosmology is that the calibration of the luminosity relations of GRBs depends on the cosmological model due to the lack of sufficient low-redshift GRBs sample. In this paper, we present a new method to calibrate the GRB relations in a cosmological model independent way. Since sources at the same redshift should have the same luminosity distance, we obtain the distance modulus of a GRB at a given redshift by interpolating from the Hubble diagram of type Ia Supernovae (SNe Ia) of which the distance moduli are completely cosmological model independent. Then we calibrate seven GRB luminosity relations without assuming a particular cosmological model and construct the GRB Hubble diagram to constrain cosmological parameters. For a flat universe, we obtain $\Omega_M=0.25_{-0.05}^{+0.04}$ and $\Omega_{\Lambda}=0.75_{-0.04}^{+0.05}$ from 42 GRBs for $1.4
Bibtex entry for this abstract Preferred format for this abstract (see Preferences)
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