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Monitoring the Polarimetric Variability of δ Scorpii
Daniel Bednarski, Alex Cavaliéri Carciofi
The Be star δ Scorpii is an interesting binary system, whose primary companion created a circumstellar disk after the periastron passage of the secondary in 2000, being since then…
Spectroscopic Observations of δSco Through the 2011 Periastron Passage
Th. Rivinius, S. Štefl, D. Baade +4
We present prelimiary results from a coordinated spectroscopic campaign in 2011, centered on the δSco periastron passage in July. Data have mostly been obtained with the FEROS/2.2…
On the CQE Phase Signature Feature in High-Resolution Spectro-Interferometry of Be Stars
D. M. Faes, A. C. Carciofi, Th. Rivinius +3
We analyse a feature that is detectable at the differential phases of high-resolution spectro-interferometry of Be stars. The origin of this feature (dubbed CQE-PS, Central Quasi E…
Dynamical Evolution of Viscous Disks around Be Stars. I: photometry
X. Haubois, A. C. Carciofi, Th. Rivinius +2
Be stars possess gaseous circumstellar disks that modify in many ways the spectrum of the central B star. Furthermore, they exhibit variability at several timescales and for a larg…
Probing the properties of Be star discs with spectroastrometry and NLTE radiative transfer modelling: beta CMi
H. E. Wheelwright, J. E. Bjorkman, R. D. Oudmaijer +3
While the presence of discs around classical Be stars is well established, their origin is still uncertain. To understand what processes result in the creation of these discs and h…
New activity in the large circumstellar disk of the Be-shell star 48 Lib
S. Stefl, J. -B. Le Bouquin, A. C. Carciofi +3
Spectroscopic, polarimetric, and high spectral resolution interferometric data covering the period 1995-2011 are analyzed to document the transition into a new phase of circumstell…