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5 papers · 1 filter
The age sequence of young clusters in Perseus: Estimating ages from mass distributions
Tatiana Pavlidou, Aleks Scholz, Koraljka Muzic
Establishing ages for young clusters is key for properly tracking the star formation history of a region. In this paper we investigate a new approach to estimating ages for young p…
Hubble's Variable Nebula I: Ripples on a Big Screen
John Lightfoot, Aleks Scholz
NGC2261 is a reflection nebula illuminated by the young star R Monocerotis. Objects moving near the star occasionally cast shadows on the nebula, giving rise to its alternative nam…
Discovery of a magnetic white dwarf with unusual short-period variability
Aleks Scholz, Joe Llama, Koraljka Muzic +3
We report the discovery of a magnetic white dwarf which shows periodic variability with P=110 min, color-dependent amplitudes and a transient phase shift in the blue compared to th…
Cool Stars and Space Weather
A. A. Vidotto, M. Jardine, A. C. Cameron +8
Stellar flares, winds and coronal mass ejections form the space weather. They are signatures of the magnetic activity of cool stars and, since activity varies with age, mass and ro…
Discovery of a stripped red giant core in a bright eclipsing binary star
P. F. L. Maxted, D. R. Anderson, M. R. Burleigh +12
We report the serendipitous discovery from WASP archive photometry of a binary star in which an apparently normal A-type star (J0247-25A) eclipses a smaller, hotter subdwarf star (…