Spectroscopic Observations of d Sco Through the 2011 Periastron Passage

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Anatoly S. Miroshnichenko, Professor (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/

Abstract: We present prelimiary results from a coordinated spectroscopic campaign in 2011, centered on the d Sco periastron passage in July. Data have mostly been obtained with the FEROS/2.2m at La Silla and ESPaDOnS/CFHT at Mauna Kea echelle instruments. Main results include the absence of tidally induced disturbance to the main ß 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.

Additional Information

Astronomical Society of the Pacific Conference Series 2012, 1-4
Language: English
Date: 2012
Astronomy, Spectroscopy, periastron

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