000002286 001__ 2286
000002286 005__ 20160706142248.0
000002286 0247_ $$2DOI$$a10.1051/0004-6361/201014641
000002286 037__ $$aASTROimport-443
000002286 100__ $$aRoyer, P.
000002286 245__ $$aPACS and SPIRE spectroscopy of the red supergiant VY CMa
000002286 260__ $$c2010
000002286 520__ $$aWith a luminosity >105 L? and a mass-loss rate of ~2 × 10-4 M? yr-1, the red supergiant VY CMa truly is a spectacular object. Because of its extreme evolutionary state, it could explode as supernova any time. Studying its circumstellar material, into which the supernova blast will run, provides interesting constraints on supernova explosions and on the rich chemistry taking place in such complex circumstellar envelopes. We have obtained spectroscopy of VY CMa over the full wavelength range offered by the PACS and SPIRE instruments of Herschel, i.e. 55-672 micron. The observations show the spectral fingerprints of more than 900 spectral lines, of which more than half belong to water. In total, we have identified 13 different molecules and some of their isotopologues. A first analysis shows that water is abundantly present, with an ortho-to-para ratio as low as ~1.3:1, and that chemical non-equilibrium processes determine the abundance fractions in the inner envelope. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
000002286 700__ $$aDecin, L.
000002286 700__ $$aWesson, R.
000002286 700__ $$aBarlow, M. J.
000002286 700__ $$aPolehampton, E. T.
000002286 700__ $$aMatsuura, M.
000002286 700__ $$aAgúndez, M.
000002286 700__ $$aBlommaert, J. A. D. L.
000002286 700__ $$aCernicharo, J.
000002286 700__ $$aCohen, M.
000002286 700__ $$aDaniel, F.
000002286 700__ $$aDegroote, P.
000002286 700__ $$aDe Meester, W.
000002286 700__ $$aExter, K.
000002286 700__ $$aFeuchtgruber, H.
000002286 700__ $$aGear, W. K.
000002286 700__ $$aGomez, H. L.
000002286 700__ $$aGroenewegen, M. A. T.
000002286 700__ $$aHargrave, P. C.
000002286 700__ $$aHuygen, R.
000002286 700__ $$aImhof, P.
000002286 700__ $$aIvison, R. J.
000002286 700__ $$aJean, C.
000002286 700__ $$aKerschbaum, F.
000002286 700__ $$aLeeks, S. J.
000002286 700__ $$aLim, T.
000002286 700__ $$aLombaert, R.
000002286 700__ $$aOlofsson, G.
000002286 700__ $$aPosch, T.
000002286 700__ $$aRegibo, S.
000002286 700__ $$aSavini, G.
000002286 700__ $$aSibthorpe, B.
000002286 700__ $$aSwinyard, B. M.
000002286 700__ $$aVandenbussche, B.
000002286 700__ $$aWaelkens, C.
000002286 700__ $$aWitherick, D. K.
000002286 700__ $$aYates, J. A.
000002286 773__ $$cL145$$pAstronomy and Astrophysics$$v518$$y2010
000002286 85642 $$ahttp://esoads.eso.org/abs/2010A%26A...518L.145R
000002286 905__ $$apublished in
000002286 980__ $$aREFERD