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http://dx.doi.org/10.5140/JASS.2008.25.1.001

PERIOD ANALYSIS FOR THE F COMPONENT OF THE ∈ AURIGAE SYSTEM USING WAVELETS  

Kim, Hyouk (Jodrell bank Centre for Astrophysics, The University of Manchester, Alan Turing Building)
Publication Information
Journal of Astronomy and Space Sciences / v.25, no.1, 2008 , pp. 1-18 More about this Journal
Abstract
We present a detailed period analysis for the F-type primary of ${\in}$ Aurigae by means of Fourier and wavelet algorithm. After collecting all available data which have been observed for around 160 years (1842 - 2006) from various international databases and published references we selected only data obtained during outside eclipse among them again. As a result of analysis using CLEANest and WWZ(weighted wavelet Z-transform) several frequencies including two clear periods ($67^d\;and\;123^d$) were found. In contrast to previous results that the periods vary irregularly it seems that the primary of ${\in}$ Aurigae is double mode or multiperiodic pulsator. The presence of the two periods and their ratio indicates that the high-mass interpretation of the variable could be valid. Also better understanding of the mechanisms driving the light variability of F-type supergiant stars requires continual series of photometric and radial velocity measurements in outside eclipse of this star.
Keywords
${\in}$ Aurigae; yellow supergiant; period analysis; wavelet;
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