On the influence of the Sun on the rapid variability of compact extragalactic sources
Since December 2004, we have performed a program to monitor intraday variable sources at a frequency of 5 GHz at the Urumqi Observatory. We present our analysis of the variability characteristics of the flat-spectrum radio source AO 0235+164, which detects an annual cycle in the variability amplitud...
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2011-06, Vol.530, p.A129 |
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| container_start_page | A129 |
| container_title | Astronomy and astrophysics (Berlin) |
| container_volume | 530 |
| creator | Marchili, N. Krichbaum, T. P. Liu, X. Song, H.-G. Anderson, J. M. Witzel, A. Zensus, J. A. |
| description | Since December 2004, we have performed a program to monitor intraday variable sources at a frequency of 5 GHz at the Urumqi Observatory. We present our analysis of the variability characteristics of the flat-spectrum radio source AO 0235+164, which detects an annual cycle in the variability amplitude. This appears to correlate with the solar elongation of the source. A thorough analysis of the results of the MASIV IDV survey – which provides the variability characteristics of a large sample of compact radio sources – confirms that there is a small but detectable component of the observed fractional modulation that increases with decreasing solar elongation. We discuss the hypothesis that the phenomenon is related to interplanetary scintillation. |
| doi_str_mv | 10.1051/0004-6361/201016033 |
| format | Article |
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A thorough analysis of the results of the MASIV IDV survey – which provides the variability characteristics of a large sample of compact radio sources – confirms that there is a small but detectable component of the observed fractional modulation that increases with decreasing solar elongation. 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| source | Bacon EDP Sciences France Licence nationale-ISTEX-PS-Journals-PFISTEX; EDP Sciences; EZB-FREE-00999 freely available EZB journals |
| subjects | Astronomy Earth, ocean, space Exact sciences and technology quasars: individual: AO 0235+164 radio continuum: general scattering solar wind surveys |
| title | On the influence of the Sun on the rapid variability of compact extragalactic sources |
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