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Paper: The Be Phenomenon in the Mono-Periodic STEREO Star 13 Tau
Volume: 508, The B[e] Phenomenom: Forty Years of Studies
Page: 393
Authors: Ozuyar, D.; Stevens, I. R.
Abstract: 13 Tau is a rarely studied bright B9 V type star (V = 5.68 mag), which shows a weak double-peaked H α emission profile in its spectra. In this study, we present high-precision photometric data of 13 Tau taken by the STEREO satellite between 2007 and 2011, and compare the results to the spectroscopic findings to shed light on the Be phenomenon in the star. From the frequency analysis of the five-year data, we detected that 13 Tau has exhibited a mono-periodic light variation (f = 1.80487(1) cycles d-1 and A ∼ 2.76(8) mmag). The analysis revealed that the frequency and amplitude of the seasonal light curves varied from one year to another. From the spectroscopic data we found that the equivalent widths of the Hα line also showed variability, which seemed connected to the changes seen in both frequency and amplitude.
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