業績

論文

On the Origin of Flux Ratio Anomaly in Quadruple Lens Systems

発表誌：

Monthly Notices of the Royal Astronomical Society,　第461巻（164頁～175頁）

要旨 ：

  We explore the origin of flux ratio anomaly in quadruple lens systems. Using a semi-analytic method based on N-bodysimulations, we estimate the effect of possible magnification perturbation caused by subhaloes  Taking into account astrometric shifts, assuming that the primary lens is described by a singular isothermal ellipsoid, the expected change to the flux ratios per a multiply lensed image is just a few percent. Assuming statistical isotropy, the convergence perturbation estimated from observed 11 quadruple lens systems has a positive correlation with the source redshift,which is much stronger than that with the lens redshift.This feature also supports an idea that the flux ratio anomaly is caused mainly by line-of-sight structures rather than subhaloes. We also discuss about a possible imprint of line-of-sight structures in demagnification of minimum images due to locally underdense structures in the line of sight.

著者：

Inoue, Kaiki Taro

 

 

業績区分： 論文
発表年月： 2016.3
共同単独区分： 単著

 

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