Lyman-Alpha Galaxies at Large Redshifts

  • S. Djorgovski
Part of the Astrophysics and Space Science Library book series (ASSL, volume 141)


Strong Lyα emission has been detected from several different types of distant galaxies, radio galaxies and their companions at z ≃ 1.8, and galaxy companions of quasars at z > 3. This line emission is a good way of detecting galaxies at very large redshifts, and a powerful probe of the physical conditions and processes in them. A subset of the Lyα radio galaxies have photometric, spectroscopic, and morphological properties unlike those of any previously known class of objects, and may be interpreted as galaxies in the process of formation. These and other observations agree very well with some modern theoretical ideas, which predict that galaxy formation is an extended process which may begin at large redshifts, but culminate at z ~ 1–2. If this is the case, we may have already detected primeval galaxies. Searches can be (re)designed to test this notion.


Radio Source Radio Galaxy Stellar Population Dwarf Galaxy Galaxy Formation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • S. Djorgovski
    • 1
  1. 1.Astronomy Department and Palomar ObservatoryCalifornia Institute of TechnologyPasadenaUSA

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