Dust, Gas, and Metallicities of Cosmologically Distant Lens Galaxies

Understand

We homogeneously analyzed the \chandra\ X-ray observations of 10 gravitational lenses, HE 0047-1756, QJ 0158-4325, SDSS 0246-0805, HE 0435-1223, SDSS 0924+0219, SDSS 1004+4112, HE 1104-1805, PG 1115+080, Q 1355-2257, and Q 2237+0305, to measure the differential X-ray absorption between images, the metallicity, and the dust-to-gas ratio of the lens galaxies.

• We detected differential absorption in all lenses except SDSS 0924+0219 and HE 1104-1805.
• This doubles the sample of dust-to-gas ratio measurements in cosmologically distant lens galaxies.
• We successfully measured the gas phase metallicity of three lenses, Q 2237+0305, SDSS 1004+4112, and B 1152+199 from the X-ray spectra.