Chemical tracers of interstellar turbulence
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astronomy interstellar medium↗
Engineering topics
Langer, W.
Publications and source records attributed to Langer, W..
NASA and US contributions to Herschel
Presentation of workshop sponsored by the Jet Propulsion Laboratory.
submillimeter Far-IR Herschel FIRST↗
The importance of photoprocessing in protoplanetary disks
Midplane models of protoplanetary disks find that the cold temperatures in the outer parts of the disk ensure that virtually all molecules are accreted onto the grains.
Photoprocessing circumsteller matter photodissocia↗
The Space Infrared Interferometry Trailblazer (SPIRIT)
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SPIRIT far infrared interferometry direct-detectio↗
Space-based Interferometric Telescopes for the Far Infrared
We discuss concepts for deploying direct detection interferometers in space which are optimized for the wavelength range 40 meu to 500 meu. In particular we introduce two missions in NASA's current strategic plan: SPIRIT (SPace InfraRed Interferometric Telescope) and SPECS (Submillimeter Probe of the Evolution of Cosmic Structure).
infrared↗
Three-Dimensional Models of Cloud Evolution via Ambipolar Diffusion
We present three-dimensional smoothed particle hydrodynamics models for the evolution of magnetically supported clouds by ambipolar diffusion.
magnetised clouds hydrodynamic models ambipolar di↗
The Deuterium Chemistry in a Protoplanetary Disk
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circumstellar disks chemistry of deuterium↗
First Detection of Methanol in Protostellar Disks
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Circumstellar Disks Methanol↗
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 ↗
Population Diagram Analysis of Line Emission From Molecular Clouds
We develop the use of the population diagram method to analyze molecular emission in order to derive physical properties of interstellar clouds.
temperature distribution excitation analysis inter↗
ISOPHOT Studies of the Chemistry of a Pre-Protostellar Core
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probe interstellar chemistry Pre-Protostellar Core↗
Theoretical Models of the Structure of the Interstellar Medium
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interstellar medium (ISM) Astronomers magnetohydro↗
Dust Emission and Molecular Depletion in L1498
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ISOPHOT Dust Emission Molecular Depletion in L1498↗
Dust Emission and Molecular Depletion in L1498
The dust continuum emission provides information aboiut the chemical depletion and the properties of cold cores where there is a lack of gas tracers.
molecular cloud L1498 dust continuum emission gas-↗
On the Stability and Evolution of Isolated Molecular Clouds
We present the results of three dimensional hydrodynamic models of evolving, isolated, low mass, quiescent clouds and Bok gobules, where the interstellar radiation field plays an important role in the thermal and chemical evolution, and thermal pressure provides dominant support against gravitational collapse.
pressure chemical evolution interstellar radiation↗
Carbon Monoxide Isotopes: On the Trail of Galactic Chemical Evolution
From the early days of the discovery of radio emission from carbon monoxide it was realized that it offered unusual potential for under- standing the chemical evolution of the Galaxy and external galaxies through measurements of molecular isotopes. These results bear on stellar nucleosynthesis, star formation, and gases in the interstellar medium. Progress in isotopic radio measurements will be reviewed.
isotopes nucleosynthesis↗
Small Scale Fragmentation and Protostar Formation
POSTER.
Core D small scale fragmentary structure high spec↗