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26 April 2024 |
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Article overview
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Millimeter-band Surveys of Extragalactic Sources | | Gianfranco De Zotti
; Francesca Perrotta
; Gian Luigi Granato Laura Silva
; Roberto Ricci
; Carlo Baccigalupi
; Luigi Danese
; Luigi Toffolatti
; | | Date: |
2 Apr 2002 | | Subject: | astro-ph | | Affiliation: | INAF-OAPD)Laura Silva (INAF-OATS), Roberto Ricci, Carlo Baccigalupi, Luigi Danese (SISSA), Luigi Toffolatti (Universidad de Oviedo | | Abstract: | Surveys at mm wavelengths emphasize rare classes of extragalactic radio sources characterized by spectra keeping flat or inverted up to high frequencies (such as blazars, GPS sources, advection dominated sources, or even gamma-ray burst afterglows), which are are difficult to single out at lower frequencies where the counts are dominated by far more numerous populations. Such surveys may lead to the discovery of populations with extreme properties, such as sources of the general GPS or blazar type but peaking at mm wavelengths, whose existence is hinted by currently available data. At relatively lower flux levels mm counts are dominated by high-redshift dusty galaxies, such as those detected by SCUBA and MAMBO surveys. These data have profound implications for our understanding of the formation and early evolution of galaxies. High sensitivity surveys at cm/mm wavelengths may also detect galaxy-scale Sunyaev-Zeldovich effects due to gas heated by central active nuclei. | | Source: | arXiv, astro-ph/0204038 | | Services: | Forum | Review | PDF | Favorites | |
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