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J band Variability of M Dwarfs in the WFCAM Transit Survey
N. T. Goulding, J. R. Barnes, D. J. Pinfield +11
We present an analysis of the photometric variability of M dwarfs in the WFCAM Transit Survey. Although periodic lightcurve variability in low mass stars is generally dominated by…
The Extreme Polarimeter: Design, Performance, First Results & Upgrades
M. Rodenhuis, H. Canovas, S. V. Jeffers +4
Well over 700 exoplanets have been detected to date. Only a handful of these have been observed directly. Direct observation is extremely challenging due to the small separation an…
Constraining the Circumbinary Envelope of Z CMa via imaging polarimetry
H. Canovas, M. Min, S. V. Jeffers +2
Z CMa is a complex binary system, composed of a Herbig Be and an FU Ori star. The Herbig star is surrounded by a dust cocoon of variable geometry, and the whole system is surrounde…
Direct imaging of a massive dust cloud around R Coronae Borealis
S. V. Jeffers, M. Min, L. B. F. M. Waters +5
We present recent polarimetric images of the highly variable star R CrB using ExPo and archival WFPC2 images from the HST. We observed R CrB during its current dramatic minimum whe…