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An eclipsing 8.56 minute orbital period mass-transferring binary
Emma T. Chickles, Joheen Chakraborty, Kevin B. Burdge +34
We report the discovery of ATLAS J101342.5-451656.8 (hereafter ATLAS J1013-4516), an 8.56 minute orbital period mass transferring AM Canum Venaticorum binary with mean Gaia magnitu…
Is stellar multiplicity universal? Tight stellar binaries in the Orion Nebula Cluster
Gaspard Duchene, Sylvestre Lacour, Estelle Moraux +2
We present a survey for the tightest visual binaries among 0.3-2 Msun members the Orion Nebula Cluster (ONC). Among 42 targets, we discovered 13 new 0.025-0.15" companions. Account…
The Arches cluster revisited: II. A massive eclipsing spectroscopic binary in the Arches cluster
M. E. Lohr, J. S. Clark, F. Najarro +3
We have carried out a spectroscopic variability survey of some of the most massive stars in the Arches cluster, using K-band observations obtained with SINFONI on the VLT. One targ…
PHL 1445: An eclipsing cataclysmic variable with a substellar donor near the period minimum
M. J. McAllister, S. P. Littlefair, I. Baraffe +14
We present high-speed, three-colour photometry of the eclipsing dwarf nova PHL 1445, which, with an orbital period of 76.3 min, lies just below the period minimum of ~82 min for ca…
Summary of IAU GA SpS 5 II: Stellar and Wind Parameters
F. Martins, M. Bergemann, J. M. Bestenlehner +9
The development of infrared observational facilities has revealed a number of massive stars in obscured environments throughout the Milky Way and beyond. The determination of their…
White Light Flare Continuum Observations with ULTRACAM
Adam F. Kowalski, Mihalis Mathioudakis, Suzanne L. Hawley +4
We present sub-second, continuous-coverage photometry of three flares on the dM3.5e star, EQ Peg A, using custom continuum filters with WHT/ULTRACAM. These data provide a new view…