Analytic Time Delays andH0Estimates for Gravitational Lenses
نویسندگان
چکیده
منابع مشابه
Analytic Time Delays and H0 Estimates for Gravitational Lenses
We study gravitational lens time delays for a general family of lensing potentials, which includes the popular singular isothermal elliptical potential and singular isothermal elliptical density distribution but allows general angular structure. Using a novel approach, we show that the time delay can be cast in a very simple form, depending only on the observed image positions. Including an ext...
متن کاملDiscovering Gravitational Lenses Through Measurements Of Their Time Delays
We consider the possibility that future wide-field time-domain optical imaging surveys may be able to discover gravitationally lensed quasar pairs through serendipitous measurements of their time delays. We discuss the merits such a discovery technique would have relative to conventional lens searches. Using simulated quasar lightcurves, we demonstrate that in a survey which observes objects se...
متن کاملGravitational lens time delays and gravitational waves.
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. Contrary to a recent claim, we conclude that measurements ...
متن کاملAn Attempt To Measure The Time Delays Of Three Gravitational Lenses
I present the results of reduction and analysis of two seasons of gravitational lens monitoring using the Very Large Array (VLA) at 8.5 GHz. The campaign monitored five gravitational lenses, GL1608, GL1830, GL1632, GL1838, and GL2004 from 24 January 2002 until 18 September 2002, and from 21 May 2003 until 29 January 2004. In addition to gravitational lenses, the campaign monitored ten flux and ...
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 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: The Astrophysical Journal
سال: 2000
ISSN: 0004-637X,1538-4357
DOI: 10.1086/317201