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Paper: Spectroscopic Observations of δ Sco Through the 2011 Periastron Passage
Volume: 464, Circumstellar Dynamics at High Resolution
Page: 235
Authors: Rivinius, Th.; Štefl, S.; Baade, D.; Carciofi, A. C.; Otero, S.; Miroshnichenko, A. S.; Manset, N.
Abstract: We present prelimiary results from a coordinated spectroscopic campaign in 2011, centered on the δ Sco periastron passage in July. Data have mostly been obtained with the FEROS/2.2 m at La Silla and ESPaDOnS/CFHT at Mauna Kea echelle instruments. Main results include the absence of tidally induced disturbance to the main β Cephei pulsation mode and the absence of tidally triggered mass-ejection at time of periastron proper. The observed (as far as yet analyzed) variations are compatible with the picture of a disk that is disturbed on its outer radius, with the disturbance propagating inwards after the periastron.
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