Weak Gravitational Lensing

Weak Gravitational Lensing

While the presence of any mass bends the path of light passing near it, this effect rarely produces the giant arcs and multiple images associated with strong gravitational lensing. Most lines of sight in the universe are thoroughly in the weak lensing regime, in which the deflection is impossible to detect in a single background source. However, even in these cases, the presence of the foreground mass can be detected, by way of a systematic alignment of background sources around the lensing mass. Weak gravitational lensing is thus an intrinsically statistical measurement, but it provides a way to measure the masses of astronomical objects without requiring assumptions about their composition or dynamical state.

Read more about Weak Gravitational LensingMethodology, Weak Lensing By Clusters of Galaxies, Galaxy-galaxy Lensing, Cosmic Shear, See Also

Other articles related to "gravitational, gravitational lensing, weak":

Schiehallion Experiment - Background
... hangs straight downwards in a symmetrical gravitational field ... However, if a sufficiently large mass such as a mountain is nearby, its gravitational attraction should pull the pendulum's plumb-bob slightly out of true ... Gravitational effects, he wrote, were only discernible on the planetary scale ...
Bridgewater State University - Examples of Undergraduate Research - Physics
... Thomas Kling continues research on gravitational lensing and classical general relativity, and accepts students in the Physics field that wish to assist him ... Adelmar DoCanto, Summer 2011 ATP Grant Awardee, "Can weak lensing observations constrain matter density fall-off (truncation) at large radii?" Brian Keith ...
TAMA 300
... TAMA 300 is a gravitational wave detector located at the Mitaka campus of the National Astronomical Observatory of Japan ... It is a project of the gravitational wave studies group at the Institute for Cosmic Ray Research (ICRR) of the University of Tokyo ... currently developing the Large Scale Cryogenic Gravitational Wave Telescope (LCGT) ...
Canonical Units - Overview
... The Time Unit is defined by the gravitational parameter is the gravitational constant is the mass of the central reference body For canonical units, the gravitational parameter is defined as ...
Bernard F. Schutz
... more concretely on the physics of gravitational waves ... and head of the astrophysics group at the Max Planck Institute for Gravitational Physics in Potsdam, Germany ... is part of the LIGO Scientific Collaboration, the largest concerted effort to directly detect gravitational waves) ...

Famous quotes containing the word weak:

    If with light head erect I sing,
    Though all the muses lend their force,
    From my poor love of anything,
    The verse is weak and shallow as its source.

    But if with bended neck I grope,
    Listening behind me for my wit,
    With faith superior to hope,
    More anxious to keep back than forward it,
    Henry David Thoreau (1817–1862)