Schemes for biased galaxy formation
Three independent schemes are proposed for biasing galaxy formation toward luminous galaxies, early collapse, and denser protogalaxies in a universe containing a closure density of cold dark matter. Photinos, or other massive, neutral weakly interacting leptons are assumed to be the predominant dark matter species, and their annihilation in collapsing protogalactic clouds suppresses galaxy bulge formation for isolated systems. Shock destruction of H2 can occur at low redshift during the epoch of massive galaxy and quasar formation; the ensuing collapse and cooling of primordial clouds by Ly emission results in predominantly massive star formation that should disrupt late-forming galaxies. The high rate of stgar formtion presumed to occur during gaseous protogalaxy collapse effectively strips low-density protogalaxies by initiating a supernova-driven wind, and leaves behind low surface density remnants: ''failed galaxies.'' These schemes could all be complementary, and generally lead to the formation of luminous galaxies by rare, dense, early collapsing systems, luminous galaxy formation being suppressed in the recent past.
- Research Organization:
- Department of Astronomy, University of California at Berkeley
- DOE Contract Number:
- FG03-84ER40161
- OSTI ID:
- 6077618
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 297:1; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNIHILATION
BASIC INTERACTIONS
COSMIC GASES
COSMOLOGICAL MODELS
COSMOLOGY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
FRAGMENTATION
GALACTIC EVOLUTION
GALAXIES
GASES
GRAVITATIONAL COLLAPSE
HEATING
HYDROGEN
INTERACTIONS
INTERGALACTIC SPACE
LEPTONS
MATHEMATICAL MODELS
MOLECULES
NONMETALS
SPACE
STAR ACCRETION
STAR EVOLUTION
STELLAR ACTIVITY
STELLAR WINDS
UNIVERSE