Publication
Title
MOST photometry of the RRd Lyrae variable AQ Leo : two radial modes, 32 combination frequencies and beyond
Author
Abstract
Highly precise and nearly uninterrupted optical photometry of the RR Lyrae star AQ Leo was obtained with the MOST (Microvariability and Oscillations of Stars) satellite over 34.4 d in 2005 February-March. 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 non-radial pulsation mode and its harmonics (plus linear combinations) which warrant theoretical modelling. The unprecedented number of frequencies detected with amplitudes down to mmag precision also presents an opportunity to test non-linear theories of mode growth and saturation in RRd stars.
Language
English
Source (journal)
Monthly notices of the Royal Astronomical Society. - Oxford, 1983, currens
Publication
Oxford : 2007
ISSN
0035-8711 [print]
1365-2966 [online]
Volume/pages
379:4(2007), p. 1498-1506
ISI
000249377300023
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 26.04.2018
Last edited 14.07.2021