Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9854b&link_type=abstract
HST Proposal ID #9854
Physics
Hst Proposal Id #9854 Cosmology
Scientific paper
We propose to observe eight {8} gravitationally lensed systems which exhibit quadruple images of the background high redshift quasars. Models invoking a smooth potential fit the observed image positions accurately, in most cases better than 5 milliarcseconds. But the same models dramatically fail to predict the observed flux ratios. These anomalous flux ratios can be attributed to micro- or milli-lensing in the massive lensing halo. In this proposal, we will isolate the source of the anomalous flux ratios by using the superior resolution of HST/STIS to obtain spectrophotometric data and compare the emission line flux ratio of the QSOs to the continuum flux ratios. Due to the much larger size of the broad emission line regions, the flux ratios in the emission lines should only be affected by milli-lensing if the sub-halos are comparable or larger in projected size than the source region. That is, flux ratios observed in the QSO continuum are senstive to substructure on all scales {both micro- and milli-lensing}, while the broad emission lines are insensitive to micro-lensing due to the larger physical size of the source emission region. This sample of eight quasars will provide the definitive evidence to distinguish between possible sources causing the observed anomalous flux ratios.
No associations
LandOfFree
Anomalous Flux Ratios in Quadruple Gravitationally Lensed QSOs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Anomalous Flux Ratios in Quadruple Gravitationally Lensed QSOs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anomalous Flux Ratios in Quadruple Gravitationally Lensed QSOs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1133583