@inproceedings{9c8dc19b07ed4cfd8b1d2acc69deeaef,
title = "Observation of, and variations in, multiplet frequency asymmetries at low ℓ",
abstract = "The predominant contribution to the frequency splitting of low-ℓ solar p modes arises from the rotation of the solar interior and this lifts the frequency degeneracy in ℓ to give a symmetric pattern where the observed (synodic) separation between adjacent m (i.e., for |Δm| = 1) is ∼ 400 nHz. Magnetic fields can also contribute to the splitting, but they do so in such a way as to introduce asymmetries in the arrangement of the components within each multiplet. In full-disc data this effect may become apparent when ℓ ≥ 2. Here, we extract estimates of the frequency asymmetry for ℓ = 2, investigate variations over the activity cycle and compare the results with the near-surface predictions of Dziembowski et al. (2000) which are based upon observations from higher ℓ.",
keywords = "Acoustic frequency shift, Solar activity",
author = "Chaplin, {W. J.} and Y. Elsworth and Isaak, {G. R.} and Marchenkov, {K. I.} and Miller, {B. A.} and R. New and B. Pinter and S. Thiery",
note = "Copyright: Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.; SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO ; Conference date: 11-03-2002 Through 15-03-2002",
year = "2002",
month = jun,
language = "English",
series = "European Space Agency, (Special Publication) ESA SP",
publisher = "Elsevier",
pages = "71--73",
booktitle = "SOHO 11 Symposium on From Solar Min to Max:",
address = "Netherlands",
edition = "508",
}