The molecular envelope around the red supergiant VY CMa

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dc.creatorMuller, S.
dc.creatorDinh-V-Trung
dc.creatorLim, J.
dc.creatorHirano, N.
dc.creatorMuthu, C.
dc.creatorKwok, S.
dc.date2006-11-17
dc.date.accessioned2026-07-07T10:36:36Z
dc.date.available2026-07-07T10:36:36Z
dc.descriptionWe present millimeter interferometric observations of the molecular envelope around the red supergiant VY CMa with the SubMillimeter Array (SMA). The high angular resolution (< 2'') allows us to derive the structure of the envelope as observed in the 1.3 mm continuum, 12CO(2-1), 13CO(2-1) and SO(6,5-5,4) lines emission. The circumstellar envelope is resolved into three components: a dense, compact and dusty central component, embedded in a more diffuse and extended envelope plus a high velocity component. We construct a simple model, consisting of a spherically symmetric slowly expanding envelope and bipolar outflows with a wide opening angle (~ 120 deg.) viewed close to the line of sight (i = 15 deg.). Our model can explain the main features of the SMA data and previous single-dish CO multi-line observations. An episode of enhanced mass loss along the bipolar direction is inferred from our modelling. The SMA data provide a better understanding of the complicated morphology seen in the optical/IR high resolution observations.
dc.descriptionaccepted for publication in ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0611547
dc.identifierhttp://arxiv.org/abs/astro-ph/0611547
dc.identifierAstrophys.J.656:1109-1120,2007
dc.identifierdoi:10.1086/510513
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180107
dc.subjectAstrophysics
dc.titleThe molecular envelope around the red supergiant VY CMa
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