CMB (and other) challenges to BBN
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2002
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| _version_ | 1876433241626378240 |
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| author | Gary Steigman |
| author_facet | Gary Steigman |
| contents | CMB (and other) challenges to BBN Gary Steigman James P. Kneller Andrew Zentner Física, Astronomía y Matemáticas EARLY UNIVERSE COSMOLOGICAL PARAMETERS COSMIC MICROWAVE BACKGROUND Primordial nucleosynthesis provides a probe of the universal abundance of baryons when the universe wasonly a few minutes old. Recent observations of anisotropy in the cosmic microwave background (CMB) probethe baryon abundance when the universe was several hundred thousand years old. Observations of type Iasupernovae and clusters of galaxies in the very recent past, when the universe is several billion years old andolder, provide a complementary measure of the baryon density in excellent agreement with the early universevalues. The general agreement among the three measurements represents an impressive conrmation of thestandard model of cosmology. However, there is a hint that the CMB observations may not be in perfectagreement with those from big bang nucleosynthesis (BBN). If this \tension" between BBN and the CMBpersists, the standard model of cosmology may need to be modied. Here, in a contribution dedicated to SilviaTorres-Peimbert and Manuel Peimbert, we describe how an asymmetry between neutrinos and antineutrinos(\neutrino degeneracy") has the potential for resolving this possible conict between BBN and the CMB. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57112109 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.12 |
| format | Artículo científico |
| id | redalyc_57112109 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | CMB (and other) challenges to BBN Gary Steigman Física, Astronomía y Matemáticas EARLY UNIVERSE COSMOLOGICAL PARAMETERS COSMIC MICROWAVE BACKGROUND CMB (and other) challenges to BBN Gary Steigman James P. Kneller Andrew Zentner Física, Astronomía y Matemáticas EARLY UNIVERSE COSMOLOGICAL PARAMETERS COSMIC MICROWAVE BACKGROUND Primordial nucleosynthesis provides a probe of the universal abundance of baryons when the universe wasonly a few minutes old. Recent observations of anisotropy in the cosmic microwave background (CMB) probethe baryon abundance when the universe was several hundred thousand years old. Observations of type Iasupernovae and clusters of galaxies in the very recent past, when the universe is several billion years old andolder, provide a complementary measure of the baryon density in excellent agreement with the early universevalues. The general agreement among the three measurements represents an impressive conrmation of thestandard model of cosmology. However, there is a hint that the CMB observations may not be in perfectagreement with those from big bang nucleosynthesis (BBN). If this \tension" between BBN and the CMBpersists, the standard model of cosmology may need to be modied. Here, in a contribution dedicated to SilviaTorres-Peimbert and Manuel Peimbert, we describe how an asymmetry between neutrinos and antineutrinos(\neutrino degeneracy") has the potential for resolving this possible conict between BBN and the CMB. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57112109 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.12 |
| title | CMB (and other) challenges to BBN |
| topic | Física, Astronomía y Matemáticas EARLY UNIVERSE COSMOLOGICAL PARAMETERS COSMIC MICROWAVE BACKGROUND |
| url | https://www.redalyc.org/articulo.oa?id=57112109 |