SIMBAD references

2007ApJ...660..206D - Astrophys. J., 660, 206-210 (2007/May-1)

Probing ∼100 AU intergalactic Mg II absorbing ``Cloudlets'' with quasar microlensing.


Abstract (from CDS):

Intergalactic Mg II absorbers are known to have structures down to scales ∼102.5 pc, and there are now indications that they may be fragmented on scales ≲10–2.5 pc according to Hao and coworkers. When a lensed quasar is microlensed, the microimages of the quasar experience creation, destruction, distortion, and drastic astrometric changes during caustic crossings. I show that quasar microlensing can effectively probe Mg II and other absorption ``cloudlets'' with sizes ∼10–4.0 to 10–2.0 pc by inducing significant spectral variability on timescales of months to years. With numerical simulations, I demonstrate the feasibility of applying this method to Q2237+0305, and I show that high-resolution spectra of this quasar in the near future would provide a clear test of the existence of such metal-line absorbing ``cloudlets.''

Abstract Copyright:

Journal keyword(s): Cosmology: Gravitational Lensing - Galaxies: Intergalactic Medium - Galaxies: Quasars: Absorption Lines

Simbad objects: 6

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