Results 21 to 30 of about 64,072 (295)
‘Missing image’ in gravitational lens systems? [PDF]
Nature, 1986 The gravitational lens models involving extended mass distribution generally predict an odd number of images with one of the images close to the centre of the principal lensing galaxy. In all the observed lens systems only an even number of images have been unambigously detected so far.
D. Narasimha +2 more
openaire +1 more source
Studies of relativistic effects with radioastron space mission [PDF]
Serbian Astronomical Journal, 2007 In the review we discuss possible studies of GR phenomena such as gravitational microlensing and shadow analysis with the forthcoming RadioAstron space mission.
Zakharov A.F.
doaj +1 more source
High Resolution Gravitational Lens Model
Open Astronomy, 2015 A new model of gravitational lens – high-resolution gravitational lens based on the metric of gravitational field produced by N moving and rotating finite-sized bodies – is proposed. The model is applied to the case of a double galaxy gravitational lens.
Chechin L. M.
doaj +1 more source
Degeneracy in exotic gravitational lensing [PDF]
, 2002 We present three different theoretically foreseen, but unusual, astrophysical situations where the gravitational lens equation ends up being the same, thus producing a degeneracy problem.
Cooray A. +9 more
core +2 more sources
THE ANALYSIS OF IMAGES OF A CIRCULAR SOURCE IN N-POINT GRAVITATIONAL LENSES
Odessa Astronomical Publications, 2018 Currently, in the field of computer processing, there are difficulties. When processing astrophysical experimental data, the difficulties are connected, on the one hand, with a large amount of information that requires processing, and, on the other hand,
S. D. Bronza +2 more
doaj +1 more source
The cosmological lens equation and the equivalent single-plane gravitational lens [PDF]
, 1997 The gravitational lens equation resulting from a single (non-linear) mass concentration (the main lens) plus inhomogeneities of the large-scale structure is shown to be strictly equivalent to the single-plane gravitational lens equation without the ...
Schneider, Peter
core +3 more sources
Search for gravitational lens candidates in the XMM-LSS/CFHTLS common field [PDF]
, 2013 Our aim was to identify gravitational lens candidates among some 5500 optical counterparts of the X-ray point-like sources in the medium-deep ~11 sq. deg. XMM-LSS survey.
Chiappetti, L. +7 more
core +2 more sources
Theory of gravitational lensing on a curved cosmic string
European Physical Journal C: Particles and Fields, 2023 It is discussed in detail the complete mathematical model of gravitational lensing on a single cosmic string (CS) of general shape and position with respect to the line of sight.
Igor I. Bulygin +2 more
doaj +1 more source
The final candidate from the JVAS/CLASS search for 6 arcsec to 15 arcsec image separation lensing [PDF]
, 2010 A search for 6 arcsec to 15 arcsec image separation lensing in the Jodrell Bank-Very Large Array Astrometric Survey (JVAS) and the Cosmic Lens All-Sky Survey (CLASS) by Phillips et al.
Barvainis +45 more
core +2 more sources
Semilinear Gravitational Lens Inversion [PDF]
The Astrophysical Journal, 2003 We describe a new method for analyzing gravitational lens images, for the case where the source light distribution is pixelized. The method is suitable for high resolution, high S/N data of a multiply-imaged extended source. For a given mass distribution, we show that the step of inverting the image to obtain the deconvolved pixelized source light ...
Warren, Steve, Dye, Simon
openaire +2 more sources