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VII. Effects of massive stars on the ISM
HII region expansion, stellar winds, SN explosions, superbubbles, stimulated star formation.
DW pp. 112-140, pp. 150-152. Clear derivation of scaling relations.
DW pp. 64-86. HII regions.
S 12.1 (HII regions, ionization fronts, Stromgren spheres), S12.2 (SN shells—3 phases scaling),
S 12.3 (effects of explosions).
Papers on numerical hydro. simulations of shock-cloud interactions (Klein et al., Xu & Stone), supershells.
VIII. Diagnostics of the ISM
Estimating volume densities and temperatures for neutral and molecular gas using atomic and molecular lines.
Defining "clouds;" Larson's scaling relations (compilations, PCA estimate,...), cloud mass spectrum.
Velocity information from spectral lines: "turbulent" linewidths, statistics of centroid velocities, collapse signatures.
Statistical descriptors of structure: correlation function, perimeter-area fractal dimension, genus, Š
IX. Star formation—single star and cluster scale
Virial theorem estimates, free fall collapse solutions, rotation and magnetic field effects on collapse,
fragmentation, opacity limit to stellar masses, angular momentum and magnetic flux problems. Numerical
simulations of cluster formation. The initial mass function (IMF). (Protostellar disks.)
DW 141-148.
S 13.3b.
Hartmann ch. 3.1-3.4.
(Hartmann chapters on disk models and observations.)
Recent papers on cluster formation simulations by Klessen et al., Bate et al.
X. Galactic-scale ISM and star formation
Power sources for galactic gas motions; halos, fountains, chimneys, bubbles, observations of ISM and
SF in other galaxies, galactic-scale simulations, starburst galaxies, star formation at large redshifts.
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