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- W4297977807 abstract "We present an analysis of archival Spitzer InfraRed Spectrograph (IRS) observations of the recurrent nova RS Ophiuchi obtained on several occasions, beginning about 7 months after the outburst in 2006. These data show atomic emission lines, absorption bands due to photospheric SiO, and the well known silicate dust features at $9.7,mu$m and $18,mu$m. The dust emission, arising in the wind of the secondary star, is fitted by Dusty models for mass-loss rates in the range $1.0-1.7times10^{-7}$M$_{odot}$yr$^{-1}$. The silicate features are similar in profile to those seen in circumstellar environments of isolated late-type stars and some dusty symbiotic binaries, although the longer wavelength feature peaks at $17,mu$m,, instead of the usual $18,mu$m, indicating peculiar grain properties. The dust features are variable, appearing stronger in 2006-2007 during outburst than in 2008-2009 when the system was in the quiescent state. This variability is attributed to changes in the ultraviolet output and the reformation of the accretion disk, although a decline in the mass-loss rate of the red giant secondary star could also play a role. Further observations, in the aftermath of the 2021 eruption, could provide a definitive conclusion." @default.
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- W4297977807 date "2022-09-29" @default.
- W4297977807 modified "2023-10-14" @default.
- W4297977807 title "Rise and fall of silicate dust in RS Ophiuchi following the 2006 eruption" @default.
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- W4297977807 doi "https://doi.org/10.1093/mnras/stac2771" @default.
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