Evidence for the presence of dust in intervening QSO absorbers from the Sloan Digital Sky Survey

Details Evidence for the presence of dust in intervening QSO absorbers from the Sloan Digital Sky Survey Evidence for the presence of dust in intervening QSO absorbers from the Sloan Digital Sky Survey

2005-04-25

arxiv.org/abs/astro-ph/0504532v1

Astronomy and Astrophysics

Astrophysics

Poster paper presented at the IAU Colloquium #199 on "Probing Galaxies through Quasar Absorption Lines" held in Shanghai, Chin

Scientific paper

10.1017/S1743921305002978

We find evidence for dust in the intervening QSO absorbers from the spectra of QSOs in the Sloan Digital Sky Survey Data Release 1. No evidence is found for the 2175 A feature which is present in the Milky Way dust extinction curve. The extinction curve resembles the SMC extinction curve. The observed Delta(g-i) excess for QSOs with strong absorption systems appears to be a result of the reddening due to dust in the intervening absorbers.

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