Observing gravitational lenses from intensity fluctuations: experimental validation of the technique
نویسندگان
چکیده
منابع مشابه
Scattering of gravitational radiation Intensity fluctuations
Aims. The effect of gravitational microlensing on the intensity of gravitational radiation as it propagates through an inhomogeneous medium is considered. Lensing by both stars and a power law spectrum of density perturbations is examined. Methods. The long wavelengths characteristic of gravitational radiation mandate a statistical, physical-optics approach to treat the effect of the lensing. R...
متن کاملThe Hubble Constant from (CLASS) Gravitational Lenses
One of the main objectives of the Cosmic Lens All-Sky Survey (CLASS) collaboration has been to find gravitational lens (GL) systems at radio wavelengths that are suitable for the determination of time delays between image pairs. The survey is now near completion and at least 18 GL systems have been found. Here, I will discuss our efforts to measure time delays from several of these systems with...
متن کاملDetection of Gravitational Lenses and Measurement of Time Delays from Radiation Fluctuations
I suggest that measurements of intensity fluctuations caused by classical wave interactions can be used to find unresolved gravitational lenses and determine time delays of essentially arbitrary length among the images formed by a gravitational lens. No interferometry is needed, the time delays can be measured by analyzing the intensity signal alone. The technique works with lensed sources that...
متن کاملGravitational Lenses
Gravitational lenses are becoming a precious mean of probing the matter distribution in the Universe. From the search of matter in the Galactic halo to the study of the large-scale structures of the Universe, the gravitational lens effects offer a unique alternative to light surveys and are now widely used. This evolution is due in particular to the use of new observation devices, such as the w...
متن کاملObserving Gravitational Waves from the First Generation of Black Holes
The properties of the first generation of black-hole seeds trace and distinguish different models of formation of cosmic structures in the high-redshift universe. The observational challenge lies in identifying black holes in the mass range ∼ 100 − 1000M⊙ at redshift z ∼ 10. Here we show that future groundbased laser interferometers could observe gravitational waves produced by the coalescence ...
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: Monthly Notices of the Royal Astronomical Society
سال: 2010
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2010.17798.x