Detection of abundant solid methanol toward young low mass stars

@article{Pontoppidan2003DetectionOA,
  title={Detection of abundant solid methanol toward young low mass stars},
  author={Klaus M. Pontoppidan and Emmanuel Dartois and E. F. van Dishoeck and W. F. Thi and Louis D'hendecourt},
  journal={Astronomy and Astrophysics},
  year={2003},
  volume={404}
}
We present detections of the absorption band at $\rm 3.53~\mu m$ due to solid methanol toward three low-mass young stellar objects located in the Serpens and Chameleon molecular cloud complexes. The sources were observed as part of a large spectroscopic survey of  ≈ 40 protostars. This is the first detection of solid methanol in the vicinity of low mass ($M\la 1~M_{\odot}$) young stars and shows that the formation of methanol does not depend on the proximity of massive young stars. The… 

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References

SHOWING 1-10 OF 19 REFERENCES
Near-Infrared Photometric Variability of Stars toward the Chamaeleon I Molecular Cloud
We present the results of a J, H, and K_s photometric monitoring campaign of a 0.°72 × 6° area centered on the Chamaeleon I star-forming region. Data were obtained on 15 separate nights over a 4
New 3 Micron Spectra of Young Stellar Objects with H2O Ice Bands
We present new ground-based 3 μm spectra of 14 young stellar objects with H2O ice absorption bands. The broad absorption feature at 3.47 μm was detected toward all objects, and its optical depth is
Chemical differentiation in regions of massive star formation.
TLDR
The origin of the apparent differentiation between nitrogen- bearing molecules and complex oxygen-bearing molecules that is observed in hot molecular cores associated with massive protostars is reexamined and calculations show that the presence of ammonia in mantles and the core temperature are key quantities in determining N/O differentiation.
Does IRAS 16293–2422 have a hot core? Chemical inventory and abundance changes in its protostellar environment
A detailed radiative transfer analysis of the observed continuum and molecular line emission toward the deeply embedded young stellar object IRAS 16293-2422 is performed. Accurate molecular
Three Micron Hydrocarbon and Methanol Absorption in Taurus
The 3.3-4.0 μm spectral region contains the fundamental C-H stretching vibrations of alcohols and aliphatic hydrocarbons and provides a powerful method of characterizing the organic component of
Deep Near-Infrared Images and ISOCAM Observations of Chamaeleon I North*
We present the results of deep near-infrared imaging and ISOCAM observations of three selected regions localized in the northern part of the Chamaeleon I dark cloud, in order to search for the
A 3 μm Survey of the Chamaeleon I Dark Cloud
We describe an L-band photometric survey of ~ 0.5 deg2 of the Chamaeleon I dark cloud. The survey has a completeness limit of L < 11.0. Our survey detects 124 sources, including all known
Comet Halley as an aggregate of interstellar dust and further evidence for the photochemical formation of organics in the interstellar medium
TLDR
Analysis of mixtures of CO:NH3:H2O at 12 K results in the formation of an organic residue which is not volatile in high vacuum at room temperature and the detection of C2–C3 hydroxy acids and hydroxy amides, glycerol, urea, glycine, hexamethylene tetramine, formamidine and ethanolamine.
Racemic amino acids from the ultraviolet photolysis of interstellar ice analogues
TLDR
A laboratory demonstration that glycine, alanine and serine naturally form from ultraviolet photolysis of the analogues of icy interstellar grains is reported, suggesting that at least some meteoritic amino acids are the result of interstellar photochemistry, rather than formation in liquid water on an early Solar System body.
Laboratory Studies of the Formation of Methanol and Other Organic Molecules by Water+Carbon Monoxide Radiolysis: Relevance to Comets, Icy Satellites, and Interstellar Ices
Radiation processing of cometary, planetary, and interstellar ices has been investigated by irradiating mixtures of H2O and CO near 16 K with 0.8-MeV protons. IR spectroscopy and isotopic
...
1
2
...