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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2004

The buried Balmer-edge signatures from quasars

Abstract

In our previous paper, we reported the detection of a Balmer edge absorption feature in the polarized flux of one quasar (Ton202). We have now found similar Balmer edge features in the polarized flux of four more quasars (4C09.72, 3C95, B21208+32, 3C323.1), and possibly a few more, out of 14 newly observed with the Very Large Telescope and the Keck Telescope. In addition, we also re-observed Ton202, but we did not detect such a dramatic feature, apparently due to polarization variability (the two observations are 1 yr apart). The polarization measurements of some quasars are affected by an interstellar polarization in our Galaxy, but the measurements have been corrected for this effect reasonably well.
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Dates and versions

hal-03733030 , version 1 (16-09-2022)

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Makoto Kishimoto, Robert Antonucci, Catherine Boisson, Omer Blaes. The buried Balmer-edge signatures from quasars. Monthly Notices of the Royal Astronomical Society, 2004, 354, pp.1065-1092. ⟨10.1111/j.1365-2966.2004.08268.x⟩. ⟨hal-03733030⟩
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