Strong gravitational lensing
Probing Quantum Gravity through Strong Gravitational Lensing
... used gravitational lensing to explore its distribution in cluster ...groups. Strong lensing allows the determination of important physical parameters such as the total mass of the ...
19
The impact of strong gravitational lensing on observed Lyman-break galaxy numbers at 4 ≤ z ≤ 8 in the GOODS and the XDF blank fields
... the strong lensing optical depth, τ ...the strong lensing optical depth for sources at z ∼ 4, z ∼ 5, z ∼ 6 and z ∼ ...the strong lensing optical depths at these redshifts ...
13
H ATLAS/GAMA: magnification bias tomography Astrophysical constraints above ∼1 arcmin
... The gravitational lensing effect produced by a foreground deflector magnifies the light rays coming from background sources along the line-of-sight and stretches the area of the sky region around ...the ...
31
Adaptive semi linear inversion of strong gravitational lens imaging
... Strong gravitational lensing has seen rapid progress over the past decade thanks to the advent of targeted searches for strongly lensed ...2009), Strong Lensing in the Legacy Survey ...
20
Gravitational Lensing with a Large Deflection Angle as a Probe of General Relativity and the Galactic Center
... In Chapter 2, we introduce our numerical method for solving the gravitational lensing equations around black holes, when bending angles can be very large. We calculate the image magnifications and positions ...
202
The Effect of Detector Nonlinearity on WFIRST PSF Profiles for Weak Gravitational Lensing Measurements
... Systematic errors that originate from a telescope’s detectors (image sensors) introduce biases in astronomical observables such as photometry and astrometry that propagate into shear measure- ment biases. These type of ...
26
Weak gravitational lensing by Einstein-non-linear-Maxwell-Yukawa black hole
... the gravitational waves from black holes has been discover ...the gravitational lensing by black holes has attain incredible attention in the last few decade, essentially because of the solid proof ...
9
Rau, Markus Michael (2017): Photometric redshift estimation for precision cosmology. Dissertation, LMU München: Fakultät für Physik
... the lensing convergence power spectrum we obtain using the DES photo-z as compared with the results obtained using spec-z is a result of the large-scale-structure peaks in the spectroscopic dataset, that are ...
185
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing
... If the B mode is thought to originate from small-scale random astrometric errors, or from KiDS-450 PSF distor- tions, then the mitigation strategy outlined above would be a reasonable approach to take. If the B mode is ...
50
Deflection Angle of Photon Through Dark Matter by Black Holes/Wormholes Using the Gauss-Bonnet Theorem
... its gravitational interactions and it is only known that dark matter is non-baryonic, non- relativistic (or cold), and it has weak non-gravitational ...
6
Effect of the Hair on Deflection Angle by Asymptotically Flat Black Holes in Einstein-Maxwell-Dilaton Theory
... weak gravitational lensing in the spacetime of hairy black hole in Einstein-Maxwell theory with a non-minimally coupled dilaton and its non-trivial ...weak gravitational lensing by ...
9
Study of Variation of Gravitational Constant (G) in the Very Strong Gravitational Field
... very strong gravitational field of the compact bodies like super massive black holes and neutron stars applying special relativity and Newton’s law of gravitation for two bodies where v be the velocity of ...
5
Hilbert, Stefan Johannes (2008): Ray-Tracing through the Millennium Simulation. Dissertation, LMU München: Fakultät für Physik
... its strong lensing ...addition, strong lensing depends on the projected density distribution rather than the 3-D density profile which Power et ...
103
Horava Gravity in the Effective Field Theory formalism: From cosmology to observational constraints
... and lensing power spectra by Planck 2013, WMAP low-` polarization spectra, WiggleZ galaxy power spectrum, local Hubble measurements, Supernovae data from SNLS, SDSS and HST and the baryon acoustic oscillations ...
28
Schäfer, Björn Malte (2005): Methods for detecting and characterising clusters of galaxies. Dissertation, LMU München: Fakultät für Physik
... to lensing are small, being of order υ/c, where υ is the velocity of the deflecting mass, they may contribute to the weak cosmological lensing: The cluster peculiar velocities following from a cosmological ...
222
230 GHz VLBI Observations of M87: Event-horizon-scale Structure during an Enhanced Very-high-energy γ-Ray State in 2012
... VLBI observations at 230 GHz can address at least two issues concerning the fundamental nature of M87. The fi rst is the event-horizon-scale structure of the jet launching region, which is crucial for understanding the ...
11
Effect of the Dilaton Field on Deflection Angle of Massive Photons by Black Holes in Einstein-Maxwell-Dilaton-Axion Theory
... In this work, we have study the deflection angle for the EMDA BH. To do so, by considering the null geodesic method as well as new geometric techniques (Gauss-Bonnet theorem and optical geometry) established by Gibbons ...
6
Studying galaxy troughs and ridges using weak gravitational lensing with the Kilo-Degree Survey
... that lensing measures the average den- sity contrast along the entire line-of-sight ...stacked gravitational lensing signals is that this method only measures the average shear as a function of the ...
22
First test of Verlinde's theory of emergent gravity using weak gravitational lensing measurements
... excess gravitational force: the Verlinde (2016) model of emergent gravity ...for gravitational entropy is essential to derive Einstein’s laws of gravity (Jacobson 1995; Padmanabhan 2010; Verlinde 2011; ...
13
Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies
... While there are significant previous studies revealing high lev- els of star formation in quasar host galaxies, these studies have in- evitably focused on significantly bright sources due to limitations in sensitivity or ...
22