Invited review to appear in New Horizons in Astronomy, ASP Conference Series
astro-ph/0512384

For a PDF version of the article, click here.

GALAXY FORMATION

Eric Gawiser


NSF Astronomy & Astrophysics Postdoctoral Fellow (AAPF), Yale Astronomy Department and Yale Center for Astronomy & Astrophysics, PO Box 208101, New Haven, CT 06520-8101


Abstract. I summarize current knowledge of galaxy formation with emphasis on the initial conditions provided by the LambdaCDM cosmology, integral constraints from cosmological quantities, and the demographics of high-redshift protogalaxies. Tables are provided summarizing the number density, star formation rate and stellar mass per object, cosmic star formation rate and stellar mass densities, clustering length and typical dark matter halo masses for Lyman break galaxies, Lyman alpha emitting galaxies, Distant red galaxies, Sub-millimeter galaxies, and Damped Lyman alpha absorption systems. I also discuss five key unsolved problems in galaxy formation and prognosticate advances that the near future will bring.


Keywords: galaxies:formation, galaxies:high-redshift


Table of Contents

BOUNDARY CONDITIONS FOR GALAXY FORMATION
Initial Conditions: CDM Cosmology
Final Conditions: Low-redshift Galaxies

INTEGRAL CONSTRAINTS: COSMOLOGICAL QUANTITIES
Cosmic Density of Neutral Gas
Star Formation Rate Density
Stellar Mass Density
Cosmic Metal Enrichment History

THEORETICAL ADVANCES

PROTOGALAXY DEMOGRAPHICS
Lyman Break Galaxies (LBGs)
Lyman Alpha Emitters (LAEs)
Distant Red Galaxies (DRGs)
Sub-Millimeter Galaxies (SMGs)
Damped Lyman Absorption Systems (DLAs)

CLUSTERING OF PROTOGALAXIES

FIVE UNSOLVED PROBLEMS IN GALAXY FORMATION

CONCLUSIONS: COMING ATTRACTIONS

REFERENCES

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