Emergence of Fresnel diffraction zones in gravitational lensing by a cosmic string
نویسندگان
چکیده
منابع مشابه
Wave effect in gravitational lensing by a cosmic string
.5ex > ∼ < ∼ graphicxdcolumnbm document Wave effect in gravitational lensing by a cosmic string Kazuhiro Yamamoto and Keiji Tsunoda Department of Physical Science, Hiroshima University, HigashiHiroshima 739-8526, Japan abstract The wave effect in the gravitational lensing phenomenon by a straight cosmic string is investigated. The interference pattern is expressed in terms of a simple formula. ...
متن کاملCharacterizing a cosmic string with the statistics of string lensing
The deep imaging of the field of an observed lensing event by a cosmic string reveals many additional lensing events. We study the statistics of such string lensing. We derive explicit expressions for the distributions of image separations of lensing by a cosmic string and point out that they are quite sensitive to parameters which characterize the cosmic string, such as the redshift and tensio...
متن کاملTemperature Fluctuations of Cosmic Microwave Background Induced by Gravitational Lensing
Adopting the accepted interpretation of the cosmic microwave background (CMBR) as a relic of the early hot universe we show that any angular intensity variations existing in the background at the “last scattering surface” at the redshift of 10s will induce bright fluctuations through gravitational lensing by intervening masses. The resulting temperature variations AT are estimated for gravitati...
متن کاملExact gravitational lensing by cosmic strings with junctions
We point out that the results by Brandenberger et al. in Phys.Rev.D77:083502(2008) that the geometry around the straight cosmic strings with stationary junctions is flat to linear order in the string tension can be immediately extended to any order.
متن کاملGravitational lensing on the Cosmic Microwave Background by gravity waves
We study the effect of a stochastic background of gravitational waves on the gravitational lensing of the Cosmic Microwave Background (CMB) radiation. It has been shown that matter density inhomogeneities produce a smoothing of the acoustic peaks in the angular power spectrum of the CMB anisotropies. A gravitational wave background gives rise to an additional smoothing of the spectrum. For the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters A
سال: 2017
ISSN: 0375-9601
DOI: 10.1016/j.physleta.2017.03.046