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Observations of deuterated molecules as probes of the earliest stages of star formation.

Observations of deuterated molecules as probes of the earliest stages of star formation. Helen Roberts University of Manchester. Dark Clouds: T ~ 10K H 2 density ~ 10 4 cm -3 Contain large, unsaturated molecules Typical D/H ratios are 1-10%. E 1 ~ 200 K; E 2 ~ 370 K; E 3 ~550 K.

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ISM & Astrochemistry Lecture 5

ISM & Astrochemistry Lecture 5. Dark Clouds. Steady state reached after about 1 million years Most hydrocarbons peak at about 10 5 yr Problem: Gas-grain interaction Sticking time ~ 3 10 9 /n(cm -3 ) yr Results in icy mantles; no gas-phase except H, D and He.

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236 views • 15 slides

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Molecular d h ratios - PowerPoint PPT Presentation

Observations of deuterated molecules as probes of the earliest stages of star formation.

ISM &amp; Astrochemistry Lecture 5

ISM & Astrochemistry Lecture 5