Gravitation, Cosmology, and Cosmic-Ray Physics (1986) / Chapter Skim
Currently Skimming:
13. Opportunities
13. Opportunities
Pages 101-107
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 101... ...
The many discoveries of IRAS highlight the untapped richness of the infrared sky, so long obscured by atmospheric absorption and emission. For cosmology the infrared region holds special promise because, as illustrated in Figure 13.1, this is where one may at last see the birth of galaxies.
|
From page 102... ...
formation may have been redshifted by cosmological expansion into the infrared region. The detection and study of primeval galaxies will give us a major foothold in the little understood epoch between z = 103 and z = 1, and perhaps will also be the evolution of large-scale structure will be clarified.
|
From page 103... ...
High spatial resolution (better than 0.1 arcsec) and broad spectral coverage will allow more detailed observations of nearby and distant galaxies, leading to better understanding of the physical properties of galaxies including evolution.
|
From page 104... ...
Currently, LDR offers our best hope of pushing small-scale anisotropy measurements to levels of ATIT ~ 10-6, in pursuit of the primordial density fluctuation spectrum. Above the atmosphere LDR offers the low-noise, broadband capability needed for sensitive measurements near the peak of the spectrum at A ~ 2 mm.
|
From page 105... ...
Some possible signatures that have been suggested include x rays from accreting black holes, infrared radiation from very-low-mass stars' ultraviolet photons from the decay of massive neutrinos, direct detection of magnetic monopoles, and the photons from axion decay induced by magnetic fields. Theoretical studies will continue to impose constraints' such as
|
From page 106... ...
PARTICLE PHYSICS AND COSMOLOGY Conventional cosmology, if correct, places some important constraints on particle physics; examples are the allowed number of neutrino types and the allowed ranges of masses and half-lives of neutrinos. The new particle physics has generated some exceedingly stimulating ideas in cosmology and has great potential for influencing future thinking and directions; for example, the discovery of Higgs particles would be of major importance in lending credence to the inflation scenario.
|
From page 107... ...
Such studies may invoke a wide variety of possible scenarios, but they must mesh with a rich texture of observations. In many cases extensive numerical computation is essential, and here a barrier to progress is the somewhat irregular and informal coupling of theorists to the frontiers of progress in computing technology.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.