MG13 - Talk detail |
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Participant |
Wang, Fayin | |||||||
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Institution |
Department of Astronomy, Nangjing University - 22 HanKou road - Nanjing - JiangSu - China | |||||||
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Session |
OC3 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Weak gravitational lensing effects on cosmological parameters and dark energy from gamma-ray bursts | |||||
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Abstract |
We investigate the gravitational lensing effect on the cosmological parameters and dark energy equation of state from GRBs. We first calibrated the GRB luminosity relations without assuming any cosmological models. The luminosity distances of low-redshift GRBs were calibrated with the cosmography method using a latest type Ia supernova (SNe Ia) sample. We find that the gravitational lensing has non-negligible effects on the determination of cosmological parameters and dark energy. The gravitational lensing shifts the best-fit constraints on cosmological parameters and dark energy. Because high-redshift GRBs are more likely to be reduced, the most probable value of the observed matter density is slightly lower than its actual value. |
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