Bibcode
Fletcher, Stephen T.; Broomhall, Anne-Marie; Salabert, D.; Basu, Sarbani; Chaplin, William J.; Elsworth, Yvonne; Garcia, Rafael A.; New, Roger
Bibliographical reference
The Astrophysical Journal Letters, Volume 718, Issue 1, pp. L19-L22 (2010).
Advertised on:
7
2010
Citations
119
Refereed citations
94
Description
The Sun is a variable star whose magnetic activity varies most
perceptibly on a timescale of approximately 11 years. However,
significant variation is also observed on much shorter timescales. We
observe a quasi-biennial (2 year) signal in the natural oscillation
frequencies of the Sun. The oscillation frequencies are sensitive probes
of the solar interior and so by studying them we can gain information
about conditions beneath the solar surface. Our results strongly point
to the 2 year signal being distinct and separate from, but nevertheless
susceptible to the influence of, the main 11 year solar cycle.
Related projects
Helio and Astero-Seismology and Exoplanets Search
The principal objectives of this project are: 1) to study the structure and dynamics of the solar interior, 2) to extend this study to other stars, 3) to search for extrasolar planets using photometric methods (primarily by transits of their host stars) and their characterization (using radial velocity information) and 4) the study of the planetary
Savita
Mathur