Results 11 to 20 of about 3,723 (266)
Gravitational lens time delays and gravitational waves [PDF]
Physical Review D, 1994 Using Fermat's principle, we analyze the effects of very long wavelength gravitational waves upon the images of a gravitationally lensed quasar. We show that the lens equation in the presence of gravity waves is equivalent to that of a lens with different alignment between source, deflector, and observer in the absence of gravity waves.
Frieman, J., Harari, D., Surpi, G.
openaire +3 more sources
The Gravitational Lens CFRS 03.1077 [PDF]
The Astrophysical Journal, 2002 11 pages, 5 figures, accepted by Ap ...
Crampton, David +5 more
openaire +4 more sources
THE OPTIMAL GRAVITATIONAL LENS TELESCOPE [PDF]
The Astronomical Journal, 2010 Given an observed gravitational lens mirage produced by a foreground deflector (cf. galaxy, quasar, cluster,...), it is possible via numerical lens inversion to retrieve the real source image, taking full advantage of the magnifying power of the cosmic lens. This has been achieved in the past for several remarkable gravitational lens systems.
Surdej, Jean +10 more
openaire +5 more sources
The 2dF Gravitational Lens Survey [PDF]
Publications of the Astronomical Society of Australia, 2001 AbstractThe 2 degree Field (2dF) galaxy redshift survey will involve obtaining spectra of approximately 2.5 105 objects which have previously been identified as galaxy candidates on morphological grounds. Included in these spectra should be about ten gravitationally-lensed quasars, all with low-redshift galaxies as deflectors (as the more common lenses
Mortlock, DJ, Madgwick, DS, Lahav, O
openaire +3 more sources
GRAVITATIONAL LENS MODELING WITH BASIS SETS [PDF]
The Astrophysical Journal, 2015 14 pages, 10 figures, accepted for publication in ...
Simon Birrer +2 more
openaire +3 more sources
GRAVITATIONAL LENS CANDIDATES IN THE E-CDFS [PDF]
The Astrophysical Journal, 2011 We report ten lens candidates in the E-CDFS from the GEMS survey. Nine of the systems are new detections and only one of the candidates is a known lens system. For the most promising five systems including the known lens system, we present results from preliminary lens mass modelling, which tests if the candidates are plausible lens systems ...
Haeussler, B. +6 more
openaire +5 more sources
‘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
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
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
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