An extensive photometric study of the Blazhko RR Lyrae star DM Cyg - Astrophysics > Solar and Stellar AstrophysicsReport as inadecuate




An extensive photometric study of the Blazhko RR Lyrae star DM Cyg - Astrophysics > Solar and Stellar Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: DM Cyg, a fundamental mode RRab star was observed in the 2007 and 2008seasons in the frame of the Konkoly Blazhko Survey. Very small amplitude lightcurve modulation was detected with 10.57 d modulation period. The maximumbrightness and phase variations do not exceed 0.07 mag and 7 min, respectively.In spite of the very small amplitude of the modulation, beside the frequencytriplets characterizing the Fourier spectrum of the light curve two quintupletcomponents were also identified. The accuracy and the good phase coverage ofour observations made it possible to analyse the light curves at differentphases of the modulation separately. Utilizing the IP method S\-odor, Jurcsikand Szeidl, 2009 we could detect very small systematic changes in the globalmean physical parameters of DM Cyg during its Blazhko cycle. The detectedchanges are similar to what we have already found for a large modulationamplitude Blazhko variable MW Lyrae. The amplitudes of the detected changes inthe physical parameters of DM Cyg are only about 10% of that what have beenfound in MW Lyr. This is in accordance with its small modulation amplitudebeing about one tenth of the modulation amplitude of MW Lyr.



Author: J. Jurcsik, Zs. Hurta, A. Sodor, B. Szeidl, I. Nagy, K. Posztobanyi, M. Varadi, K. Vida, B. Belucz, I. Dekany, G. Hajdu, Zs. Kova

Source: https://arxiv.org/



DOWNLOAD PDF




Related documents