Analysis of the Petersen Diagram of Double Mode High Amplitude δ Scuti Stars

Volume 44 number 1 (2016)

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Riccardo Furgoni

AAVSO - Via Fossamana, 86 46030 San Giorgio di Mantova (MN), Italy - riccardo.furgoni@gmail.com

Abstract

I created the Petersen diagram relative to all the Double Mode High Amplitude δ Scuti stars listed in the AAVSO's International Variable Star Index (Watson et al. 2007-2015) up to date December 29, 2015. For the first time I noticed that the ratio between the two periods P1/P0 seems in evident linear relation with the duration of the period P0, a finding never explicitly described in literature regarding this topic.