منابع مشابه
Solar abundances and helioseismology: fine structure spacings and separation ratios of low-degree p modes
We have used 4752 days of data collected by the Birmingham SolarOscillations Network (BiSON) to determine very precise oscillation frequencies of acoustic low-degree modes that probe the solar core. We compare the fine (small frequency) spacings and frequency separation ratios formed from these data with those of different solar models. We find that models constructed with low metallicity are i...
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The magnitudes of the external gravitational perturbations associated with the normal modes of the Sun are evaluated to determine whether these solar oscillations could be observed with the proposed Laser Interferometer Space Antenna (LISA), a network of satellites designed to detect gravitational radiation. The modes of relevance to LISA—the l = 2, low-order p, f and g-modes—have not been conc...
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The observed deficit of B solar neutrinos may call for an improved standard model of the sun or an expanded standard model of particle physics (e.g., with neutrino masses and mixing). In the former case, contemporary fluid motions and thermal fluctuations in the sun’s core may modify nuclear reaction rates and restore agreement. To test this notion, we propose a search for short–term variations...
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Helioseismology has allowed us to study the structure of the Sun in unprecedented detail. One of the triumphs of the theory of stellar evolution was that helioseismic studies had shown that the structure of solar models is very similar to that of the Sun. However, this agreement has been spoiled by recent revisions of the solar heavy-element abundances. Heavy element abundances determine the op...
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The subject of helioseismology is in a exciting phase of expansion. in terms of the methods being developed and applied, the new and challenging results coming out from the high-quality data that present observational campaigns, networks and missions are providing, the arrival of GONG+, the prospects for new missions including Solar Dynamics Observatory, and the recent groundbased results and e...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2011
ISSN: 1742-6596
DOI: 10.1088/1742-6596/271/1/012058