Global properties and formation scenarios
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Global Properties and Formation Scenarios. Session 6. Introduction by M. Fall. Assembly. Merging vs accretion lumpy or smooth Hot vs cold accretion importance of shocks Hierarchy vs something else massive old E galaxies at high z Disk vs spheroid

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Global Properties and Formation Scenarios

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Global properties and formation scenarios

Global Properties and Formation Scenarios

Session 6

Introduction by M. Fall


Assembly

Assembly

  • Merging vs accretion

    lumpy or smooth

  • Hot vs cold accretion

    importance of shocks

  • Hierarchy vs something else

    massive old E galaxies at high z

  • Disk vs spheroid

    physics of morphology

  • Disk-halo conspiracy

    Vc(R) ~ constant


Feedback

Feedback

  • How important is it in the mass, energy, and metal budgets of galaxies? (more for low-M galaxies?)

  • Is it driven by stars, AGN, or something else? (stars for low-M galaxies, AGN for high-M galaxies?)

  • How does it couple to the ISM of galaxies? (dependence on opacity and small-scale, multi-phase structure of the ISM?)

  • How does it affect galaxy assembly? (regulation

    or just removal?)


Star formation

Star Formation

  • SFR = fn (mass of gas,.…, other variables?)

  • Burst vs quiescent: different modes of SF or just different rates?

  • Tightness of dMs/dt vs Mg (Schmidt-Kennicutt) relation

  • Similarity of star and star cluster formation in interacting and normal galaxies

  • What causes “downsizing” (more recent SF in low-M galaxies):


Global properties and formation scenarios

AGN

  • What causes the tight BH-bulge relations?

  • Is the influence BH→bulge or bulge→BH?

  • When were these connections established?


Scaling relations

Scaling Relations

  • V-R-C-Z-L relations and projections

  • When were they established?

  • How do they evolve? (slowly z = 0→1?)

  • Ancestor/descendant problem (LBGs, sub-mm

    sources, etc)

  • Comparisons with models

  • Bimodality: critical feature or wrinkle?

  • Evolution in number, masses, sizes of galaxies


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