Journal
MODERN PHYSICS LETTERS A
Volume 31, Issue 1, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732316500061
Keywords
Strong field limit; gravitational lensing; deficit solid angle; quintessence-like matter
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Funding
- National Natural Science Foundation of China [11565016, 11405076]
- Science Foundation of the Education Department of Yunnan Province [2014Y066]
- Talent Cultivation Foundation of Kunming University of Science and Technology [KKSY201207053, KKSY201356060]
- Funds of the Introduced High-level Talents of Yunnan Province from the Department of Human Resources and Social Security of Yunnan Province
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Using the strong field limit approach, the strong field gravitational lensing in a black hole with deficit solid angle (DSA) and surrounded by quintessence-like matter (QM) has been investigated. The results show that the DSA epsilon(2), the energy density of QM rho(0) and the equation of state (EOS) parameter w have some distinct effects on the strong field gravitational lensing. As epsilon(2) or rho(0) increases, the deflection angle and the strong field limit coefficients all increase faster and faster. Moreover, the evolution of the main observables also has been studied, which shows that the curves at w = -2/3 are more steepy than those of w = -1/3. Compared with the Schwarzschild black hole, the black hole surrounded by QM has smaller relative magnitudes, and at w = -1/3 both the angular position and angular separation are slightly bigger than those of Schwarzschild black hole, but when w = -2/3, the angular position and the relative magnitudes all diminish significantly. Therefore, by studying the strong gravitational lensing, we can distinguish the black hole with a DSA and surrounded by QM from the Schwarzschild black hole and the effects of the DSA and QM on the strong gravitational lensing by black holes can be known better.
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