Silicate dust in the environment of RS Ophiuchi following the 2006 eruption

Details Silicate dust in the environment of RS Ophiuchi following the 2006 eruption Silicate dust in the environment of RS Ophiuchi following the 2006 eruption

2007-10-29

arxiv.org/abs/0710.5383v1

Astronomy and Astrophysics

Astrophysics

12 pages, 4 figures, accepted for publication in ApJ (Letters)

Scientific paper

10.1086/524944

We present further Spitzer Space Telescope observations of the recurrent nova RS Ophiuchi, obtained over the period 208-430 days after the 2006 eruption. The later Spitzer IRS data show that the line emission and free-free continuum emission reported earlier is declining, revealing incontrovertible evidence for the presence of silicate emission features at 9.7 and 18microns. We conclude that the silicate dust survives the hard radiation impulse and shock blast wave from the eruption. The existence of the extant dust may have significant implications for understanding the propagation of shocks through the red giant wind and likely wind geometry.

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