Small Scale Structure
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small scale structures of clouds protostar formati↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Infrared Surveys: A Golden Age of Exploration
This talk addresses the compelling scientific interest in the infrared and describes why, years from now, astronomers will view this decade as a golden era for the exploration of the infrared sky.
interstellar medium (ISM) spectroscopy quasars↗
Turbulent Diffusion and Its Effects on the Chemical Composition of Cloud Cores
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molecular cloud turbulence cloud chemical structur↗
Detection of Methanol in a Class 0 Protostellar Disk
We report the detection of emission from methanol in a compact source coincident with the position of the L1157 infrared source, which we attribute to molecules in the disk surrounding this young, class 0 protostellar object.
disk protostars pre-main sequence L1157 molecules ↗
A Candidate Protoplanet in the Taurus Star Forming Region
A long narrow filament seems to connect the protobinary to the faint companion TMR-1C, suggesting a physical association. If the sources are physically related then we hypothesize that TMR-1C has been ejected by the protobinary.
HST/NICMOS faint companion protostar filament prot↗
The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud
We report the first extragalactic detection of the complex organic molecules (COMs) dimethyl ether (CH3OCH3) and methyl formate (CH3OCHO) with the Atacama Large Millimeter/submillimeter Array (ALMA). These COMs, together with their parent species methanol (CH3OH), were detected toward two 1.3 mm continuum sources in the N 113 star-forming region in the low-metallicity Large Magellanic Cloud (LMC). Rotational temperatures (T(rot)~ 130 K) and total column densities (N(rot) ~ 10(exp 16) per sq. cm) have been calculated for each source based on multiple transitions of CH3OH. We present the ALMA molecular emission maps for COMs and measured abundances for all detected species. The physical and chemical properties of two sources with COMs detection, and the association with H2O and OH maser emission, indicate that they are hot cores. The fractional abundances of COMs scaled by a factor of 2.5 to account for the lower metallicity in the LMC are comparable to those found at the lower end of the range in Galactic hot cores. Our results have important implications for studies of organic chemistry at higher redshift.
astrochemistry – galaxies: star formation – Magell↗