000002095 001__ 2095
000002095 005__ 20160706150609.0
000002095 0247_ $$2DOI$$a10.1051/0004-6361/201526418
000002095 037__ $$aASTROimport-252
000002095 100__ $$aRau, G.
000002095 245__ $$aModelling the atmosphere of the carbon-rich Mira RU Virginis
000002095 260__ $$c2015
000002095 520__ $$aContext. We study the atmosphere of the carbon-rich Mira RU Vir using the mid-infrared high spatial resolution interferometric observations from VLTI/MIDI.  Aims: The aim of this work is to analyse the atmosphere of the carbon-rich Mira RU Vir with hydrostatic and dynamic models, in this way deepening the knowledge of the dynamic processes at work in carbon-rich Miras.  Methods: We compare spectro-photometric and interferometric measurements of this carbon-rich Mira AGB star with the predictions of different kinds of modelling approaches (hydrostatic model atmospheres plus MOD-More Of Dusty, self-consistent dynamic model atmospheres). A geometric model fitting tool is used for a first interpretation of the interferometric data.  Results: The results show that a joint use of different kinds of observations (photometry, spectroscopy, interferometry) is essential for shedding light on the structure of the atmosphere of a carbon-rich Mira. The dynamic model atmospheres fit the ISO spectrum well in the wavelength range λ = [2.9,25.0] µm. Nevertheless, a discrepancy is noticeable both in the SED (visible) and in the interferometric visibilities (shape and level), which is a possible explanation are intra-/inter-cycle variations in the dynamic model atmospheres, as well as in the observations. The presence of a companion star and/or a disk or a decrease in mass loss within the past few hundred years cannot be excluded, but these explanations are considered unlikely. Based on observations made with ESO telescopes at La Silla Paranal Observatory under programme IDs: 085.D-0756 and 093. D-0708.Appendix A is available in electronic form at http://www.aanda.org
000002095 700__ $$aPaladini, C.
000002095 700__ $$aHron, J.
000002095 700__ $$aAringer, B.
000002095 700__ $$aGroenewegen, M. A. T.
000002095 700__ $$aNowotny, W.
000002095 773__ $$cA106$$pAstronomy and Astrophysics$$v583$$y2015
000002095 85642 $$ahttp://esoads.eso.org/abs/2015A%26A...583A.106R
000002095 905__ $$apublished in
000002095 980__ $$aREFERD