MOST photometry of the RRd Lyrae variable AQ Leo: Two radial modes, 32 combination frequencies, and beyond

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dc.creatorGruberbauer, Michael
dc.creatorKohlenberg, Katrien
dc.creatorRowe, Jason F.
dc.creatorHuber, Daniel
dc.creatorMatthews, Jaymie M.
dc.creatorReegen, Piet
dc.creatorKuschnig, Rainer
dc.creatorCameron, Chris
dc.creatorKallinger, Thomas
dc.creatorWeiss, Werner W.
dc.creatorGuenther, David B.
dc.creatorMoffat, Anthony F. J.
dc.creatorRucinski, Slavek
dc.creatorSasselov, Dimitar
dc.creatorWalker, Gordon A. H.
dc.date2007-05-31
dc.date2007-07-09
dc.date.accessioned2026-07-07T10:55:58Z
dc.date.available2026-07-07T10:55:58Z
dc.descriptionHighly precise and nearly uninterrupted optical photometry of the RR Lyrae star AQ Leo was obtained with the MOST (Microvariability & Oscillations of STars) satellite over 34.4 days in February-March 2005. AQ Leo was the first known double-mode RR Lyrae pulsator (RRd star). Three decades after its discovery, MOST observations have revealed that AQ Leo oscillates with at least 42 frequencies, of which 32 are linear combinations (up to the sixth order) of the radial fundamental mode and its first overtone. Evidence for period changes of these modes is found in the data. The other intrinsic frequencies may represent an additional nonradial pulsation mode and its harmonics (plus linear combinations) which warrant theoretical modeling. The unprecedented number of frequencies detected with amplitudes down to millimag precision also presents an opportunity to test nonlinear theories of mode growth and saturation in RR Lyrae pulsators.
dc.descriptionaccepted for publication in MNRAS; revision v2 : broken references have been fixed
dc.identifierhttps://arxiv.org/abs/0705.4603
dc.identifierhttp://arxiv.org/abs/0705.4603
dc.identifierMon.Not.Roy.Astron.Soc.379:1498-1506,2007
dc.identifierdoi:10.1111/j.1365-2966.2007.12042.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186255
dc.subjectAstrophysics
dc.titleMOST photometry of the RRd Lyrae variable AQ Leo: Two radial modes, 32 combination frequencies, and beyond
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