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000002330 005__ 20160701171703.0
000002330 0247_ $$2DOI$$a10.1111/j.1365-2966.2009.14736.x
000002330 037__ $$aASTROimport-487
000002330 100__ $$aLagadec, E.
000002330 245__ $$aMetal-rich carbon stars in the Sagittarius dwarf spheroidal galaxy
000002330 260__ $$c2009
000002330 520__ $$aWe present spectroscopic observations from the Spitzer Space Telescope of six carbon-rich asymptotic giant branch (AGB) stars in the Sagittarius dwarf spheroidal galaxy (Sgr dSph) and two foreground Galactic carbon stars. The band strengths of the observed C2H2 and SiC features are very similar to those observed in Galactic AGB stars. The metallicities are estimated from an empirical relation between the acetylene optical depth and the strength of the SiC feature. The metallicities are higher than those of the Large Magellanic Cloud, and close to Galactic values. While the high metallicity could imply an age of around 1Gyr, for the dusty AGB stars, the pulsation periods suggest ages in excess of 2 or 3 Gyr. We fit the spectra of the observed stars using the DUSTY radiative transfer model and determine their dust mass-loss rates to be in the range 1.0-3.3 × 10-8Msolaryr-1. The two Galactic foreground carbon-rich AGB stars are located at the far side of the solar circle, beyond the Galactic Centre. One of these two stars shows the strongest SiC feature in our present Local Group sample. 
000002330 700__ $$a Zijlstra, A. A.
000002330 700__ $$a Sloan, G. C.
000002330 700__ $$a Wood, P. R.
000002330 700__ $$a Matsuura, M.
000002330 700__ $$a Bernard-Salas, J.
000002330 700__ $$a Blommaert, J. A. D. L.
000002330 700__ $$a Cioni, M.-R. L.
000002330 700__ $$a Feast, M. W.
000002330 700__ $$a Groenewegen, M. A. T.
000002330 700__ $$a Hony, S.
000002330 700__ $$a Menzies, J. W.
000002330 700__ $$a van Loon, J. T.
000002330 700__ $$a Whitelock, P. A.
000002330 773__ $$c598-608$$i1$$pMonthly Notices of the Royal Astronomical Society$$v396$$y2009
000002330 85642 $$ahttp://esoads.eso.org/abs/2009MNRAS.396..598L
000002330 905__ $$apublished in
000002330 980__ $$aREFERD