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Results 1 - 10
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1,302
Molecular Envelopes Around Carbon Stars
"... . We have observed four carbon stars (W Ori, RW LMi [CIT6], Y CVn, and LP And [IRC+40540]) in the HCN(J = 1 ! 0) line and three of them (RW LMi, Y CVn, and LP And) also in the CN(N = 1 ! 0) line using the IRAM interferometer on Plateau de Bure. The HCN brightness distributions are centred on the ste ..."
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in the stellar atmosphere, while the observed CN is formed in the circumstellar envelope due to...
The circumstellar molecular envelope of HD 101584 ASTRONOMY AND ASTROPHYSICS
"... Abstract. CO radio line observations reveal a molecular gas envelope around the peculiar star HD101584 with characteristics very similar to those of wellknown young post-AGB objects. We estimate that there is at least 0.1 M ⊙ of molecular gas, very likely remnant gas from a former AGB-envelope. This ..."
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Abstract. CO radio line observations reveal a molecular gas envelope around the peculiar star HD101584 with characteristics very similar to those of wellknown young post-AGB objects. We estimate that there is at least 0.1 M ⊙ of molecular gas, very likely remnant gas from a former AGB-envelope
Modeling the physical and excitation conditions of the molecular envelope of NGC 7027⋆
, 2014
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submitted to ApJ The peculiar molecular envelope around the post-AGB star IRAS
, 811
"... Circumbinary disks have been hypothesized to exist around a number of binary post-AGB stars. Although most of the circumbinary disks have been inferred through the near IR excess, a few of them are strong emitters of molecular emission. Here we present high angular resolution observations of the emi ..."
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isotope. We estimate a molecular gas mass of 0.0047 M ⊙ for this component based on the optically thinner 13 CO J=2–1 line. We discuss the relation of the molecular envelope and the circumbinary disk inferred from near IR excess and compare with other known cases where the distribution of molecular gas
The JCMT Spectral Legacy Survey: physical structure of the molecular envelope of the high-mass protostar AFGL2591
, 2010
"... Context. The understanding of the formation process of massive stars (>∼8 M) is limited, due to a combination of theoretical com-plications and observational challenges. The high UV luminosities of massive stars give rise to chemical complexity in their natal molecular clouds, and affect the dyna ..."
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the dynamical properties of their circumstellar envelopes. Aims. We investigate the physical structure of the large-scale (∼104–105 AU) molecular envelope of the high-mass protostar AFGL2591. Methods. Observational constraints are provided by spectral imaging in the 330–373 GHz regime from the JCMT Spectral
The molecular envelope of CRL 618: A new model based on Herschel/HIFI ⋆ observations.
, 2014
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envelopes
"... Abstract. We present 1D radiative transfer modelling of the envelopes of a sample of 18 low-mass protostars and pre-stellar cores with the aim of setting up realistic physical models, for use in a chemical description of the sources. The density and temperature proles of the envelopes are constraine ..."
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Abstract. We present 1D radiative transfer modelling of the envelopes of a sample of 18 low-mass protostars and pre-stellar cores with the aim of setting up realistic physical models, for use in a chemical description of the sources. The density and temperature proles of the envelopes
ASTRONOMY AND ASTROPHYSICS LETTER
"... Warm molecular envelope of M giants and Miras: a new molecule forming region unmasked by the ISO SWS ⋆ ..."
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Warm molecular envelope of M giants and Miras: a new molecule forming region unmasked by the ISO SWS ⋆
5 Molecular line interferometry of VY Canis Majoris: Probing different regions of its
"... envelope ..."
Envelope surfaces
"... Project co-funded by the European Commission within FP6 (2002–2006) We construct a class of envelope surfaces in R d, more precisely envelopes of balls. An envelope surface is a closed C 1 (tangent continuous) manifold wrapping tightly around the union of a set of balls. Such a manifold is useful in ..."
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in modeling since the union of a finite set of balls can approximate any closed smooth manifold arbitrarily close. The theory of envelope surfaces generalizes the theoretical framework of skin surfaces [5] developed by Edelsbrunner for molecular modeling. However, envelope surfaces are more flexible: where a
Results 1 - 10
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1,302
