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Article
Open AccessAuthor Correction: Outflows from the youngest stars are mostly molecular
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Article
Open AccessOutflows from the youngest stars are mostly molecular
The formation of stars and planets is accompanied not only by the build-up of matter, namely accretion, but also by its expulsion in the form of highly supersonic jets that can stretch for several parsecs1,2. As ...
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Article
Open AccessThe EChO science case
The discovery of almost two thousand exoplanets has revealed an unexpectedly diverse planet population. We see gas giants in few-day orbits, whole multi-planet systems within the orbit of Mercury, and new popu...
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Chapter
Map** the Circumstellar Envelope of OH26.5+0.6
We report the detection of CO J=l-0 of the circumstellar envelope of OH 26.5+0.6. From modelling both the dust and CO, we deduce that the envelope structure is as followed : a superwind with a mass loss rate o...
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Chapter
Spectroscopic Study of Carbon Stars with the ISO-SWS
We have observed ten carbon stars with different mass-loss rates using the Short Wavelength Spectrometer (SWS) on board ISO. We found that not only the spectral energy distribution and the dust features, but t...
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Chapter and Conference Paper
ISO-SWS Spectra of AGB Stars
In this contribution, we present a few highlights of the guaranteed time program to observe AGB stars with differing chemical compositions and mass loss rates using ISO 1 SWS. We briefly discuss C2H2 absorption i...
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Chapter
Circumstellar Silicate Mineralogy
This paper reviews spectra obtained with the SWS on board of ISO of dust shells around O-rich objects. These spectra reveal the presence of many new emission features between 10 and 45 µm. These bands are general...
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Article
ISO-SWS Spectra of AGB Stars
In this contribution, we present a few highlights of the guaranteed time program to observe AGB stars with differing chemical compositions and mass loss rates using ISO1 SWS. We briefly discuss C2H2 absorption in...
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Article
Circumstellar Silicate Mineralogy
This paper reviews spectra obtained with the SWS on board of ISO of dust shells around O-rich objects. These spectra reveal the presence of many new emission features between 10 and 45 µm. These bands are gene...
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Article
Spectroscopic Study of Carbon Stars with the ISO-SWS
We have observed ten carbon stars with different mass-loss rates using the Short Wavelength Spectrometer (SWS) on board ISO. We found that not only the spectral energy distribution and the dust features, but t...
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Article
Observations of high co rotational lines in post-AGBs and PN
We present a preliminary interpretation of high CO rotational line data obtained from KAO. The possibility of either a PDR or a shock model is considered in order to explain the observations.
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Article
The onset of axial symmetry in protoplanetary nebulae
We have obtained resolved IR images, at wavelengths from 1.2µm to 12.5µm, of a small sample of protoplanetary nebulae. The results suggest that all PPNe are axially, not spherically, symmetric, that spherical sym...
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Chapter and Conference Paper
Observations of High CO Rotational Lines in Post-Agbs and PN
We present a preliminary interpretation of high CO rotational line data obtained from KAO. The possibility of either a PDR or a shock model is considered in order to explain the observations.
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Chapter and Conference Paper
The Onset of Axial Symmetry in Protoplanetary Nebulae
We have obtained resolved IR images, at wavelengths from 1.2μm to 12.5μm, of a small sample of protoplanetary nebulae. The results suggest that all PPNe are axially, not spherically, symmetric, that spherical sym...
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Chapter and Conference Paper
Mid-Infrared Spectroscopy of Four 21μm Emission Band Sources
We report 10 and 20μm spectroscopic observations of four C-rich post-AGB objects which exhibit the unidentified emission feature at 21μm. The observations were carried out in October 1990 and May 1991 using CGS3 ...
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Chapter and Conference Paper
Mid-IR Spectra of AGB and Post-AGB Stars
We have generated models of complete nova energy distributions, including the effects of the nova dust shell emission and absorption. In order to account for the dust, we require optical constants throughout t...
