Line profile variability in the spectra of Oef stars - I. BD + 60° 2522
作者： G. Rauw , M. De Becker , J.-M. Vreux
DOI: 10.1051/0004-6361:20021776
关键词:
摘要: We report the analysis of a long term observing campaign designed to monitor spectroscopic variability Oef star BD +60° 2522. find that double-peaked He ii λ 4686 emission line undergoes strong profile on time scales 2–3 day. However, scale as well pattern these variations turn out be epoch dependent and phenomenon is thus most likely not ruled by single stable clock. On other hand, absorption lines in spectrum BD +60° 2522 display few hours might related non-radial pulsations. tentatively propose beating several pulsation modes triggers transient large-scale density perturbations confined stellar wind produce 2–3 day variability.
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