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

Authors
  • Daniel Huber
  • Jaymie M, Matthews
  • Piet, Reegen
  • Rainer, Kuschnig
  • Chris, Cameron
  • Thomas, Kallinger
  • Werner W, Weiss
  • David B, Guenther
  • Anthony F J, Moffat
  • Slavek, Rucinski
  • Dimitar, Sasselov
  • Gordon A H, Walker
  • Michael, Gruberbauer
  • Katrien, Kolenberg
  • Jason Rowe
  • T, Kallinger
Journal
Monthly Notices of the Royal Astronomical Society
Publisher
Oxford University Press
Publication Date
Aug 20, 2007
Volume
379
Issue
4
Pages
1498–1506
Source
SETI Institute
License
Unknown

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 ...

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