Quasar microlensing models with constraints on the Quasar light curves
نویسندگان
چکیده
منابع مشابه
Quantitative Interpretation of Quasar Microlensing Light Curves
We develop a general method for analyzing the light curves of microlensed quasars and apply it to the OGLE light curves of the four-image lens Q2237+0305. We simultaneously estimate the effective source velocity, the average stellar mass, the stellar mass function, and the size and structure of the quasar accretion disk. The light curves imply an effective source plane velocity of 10200 km/s <∼...
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Intergalactic Mg II absorbers are known to have structures down to scales ∼ 10pc, and there are now indications that they may be fragmented on scales . 10pc (Hao et al., astro-ph/0612409). I show that quasar microlensing can effectively probe Mg II and other absorption “cloudlets” with sizes ∼ 10 − 10pc by inducing significant spectral variability on the timescales of months to years. With nume...
متن کاملUnambiguous quasar microlensing
Microlensing studies of quasars can reveal dark matter lumps over a broad mass spectrum; we highlight the importance of monitoring quasars which are seen through the halos of low-redshift galaxies. For these configurations microlensing by planetary-mass objects will manifest itself as isolated events which are only weakly chromatic. Statistical comparison of the observed optical depths with the...
متن کاملColour changes in quasar light curves
The study of quasar variability has long been seen as a way to understanding the structure of the central engine of active galactic nuclei, and as a means of verifying the morphology of the standard model. Much work has already been done on the statistical properties of light curves monitored in one colour, and it is now possible to use these observations to test predictions of theoretical mode...
متن کاملCaustic crossings in quasar light curves ?
Numerical simulations and theoretical studies of the gravitational microlensing effect of a population of small bodies distributed along the line of sight to a compact light source such as a quasar indicate that caustic crossing effects will be present given a sufficiently large optical depth to lensing. These events will produce characteristic patterns in the quasar light curve. In this paper ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2017
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stx2380