000002193 001__ 2193
000002193 005__ 20160706143815.0
000002193 0247_ $$2DOI$$a10.1051/0004-6361/201219259
000002193 037__ $$aASTROimport-350
000002193 100__ $$aMayer, A.
000002193 245__ $$aLarge-scale environments of binary AGB stars probed by Herschel. I. Morphology statistics and case studies of R Aquarii and W Aquilae
000002193 260__ $$c2013
000002193 520__ $$aThe Mass loss of Evolved StarS (MESS) sample offers a selection of 78 asymptotic giant branch (AGB) stars and red supergiants (RSGs) observed with the PACS photometer on-board Herschel at 70 µm and 160 µm. For most of these objects, the dusty AGB wind is not spherically symmetric and the wind shape can be subdivided into four classes. In the present paper we concentrate on the influence of a companion on the morphology of the stellar wind. Literature was searched to find binaries in the MESS sample, which were subsequently linked to their wind-morphology class to assert that the binaries are not distributed equally among the classes. In the second part of the paper we concentrate on the circumstellar environment of the two prominent objects R Aqr and W Aql. Each shows a characteristic signature of a companion interaction with the stellar wind. For the symbiotic star R Aqr, PACS revealed two perfectly opposing arms that in part reflect the previously observed ring-shaped nebula in the optical. However, from the far-IR there is evidence that the emitting region is elliptical rather than circular. The outline of the wind of W Aql seems to follow a large Archimedean spiral formed by the orbit of the companion but also shows strong indications of an interaction with the interstellar medium. We investigated the nature of the companion of W Aql and found that the magnitude of the orbital period supports the size of the spiral outline. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
000002193 700__ $$aJorissen, A.
000002193 700__ $$aKerschbaum, F.
000002193 700__ $$aOttensamer, R.
000002193 700__ $$aNowotny, W.
000002193 700__ $$aCox, N. L. J.
000002193 700__ $$aAringer, B.
000002193 700__ $$aBlommaert, J. A. D. L.
000002193 700__ $$aDecin, L.
000002193 700__ $$avan Eck, S.
000002193 700__ $$aGail, H.-P.
000002193 700__ $$aGroenewegen, M. A. T.
000002193 700__ $$aKornfeld, K.
000002193 700__ $$aMecina, M.
000002193 700__ $$aPosch, T.
000002193 700__ $$aVandenbussche, B.
000002193 700__ $$aWaelkens, C.
000002193 773__ $$cA69$$pAstronomy and Astrophysics$$v549$$y2013
000002193 85642 $$ahttp://esoads.eso.org/abs/2013A%26A...549A..69M
000002193 905__ $$apublished in
000002193 980__ $$aREFERD