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39 papers · 2 filters
Recurrent Novae in M31
A. W. Shafter, M. Henze, T. A. Rector +8
The reported positions of 964 suspected nova eruptions in M31 recorded through the end of calendar year 2013 have been compared in order to identify recurrent nova candidates. To p…
The Clusters AgeS Experiment (CASE). Variable stars in the field of the globular cluster NGC 6362
J. Kaluzny, I. B. Thompson, M. Rozyczka +2
The field of the globular cluster NGC 6362 was monitored between 1995 and 2009 in a search for variable stars. BV light curves were obtained for 69 periodic variables including 34…
WISEP J004701.06+680352.1: An intermediate surface gravity, dusty brown dwarf in the AB Dor Moving Group
John E. Gizis, Katelyn N. Allers, Michael C. Liu +4
We present spectroscopy, astrometry, and photometry of the brown dwarf WISEP J004701.06+680352.1 (W0047+68), an unusually red field L dwarf at a distance of parsecs.…
Rotation, spectral variability, magnetic geometry and magnetosphere of the Of?p star CPD -28 2561
G. A. Wade, R. H. Barbá, J. Grunhut +14
We report magnetic and spectroscopic observations and modeling of the Of?p star CPD -28 2561. Using more than 75 new spectra, we have measured the equivalent width variations and e…
Properties of the solar neighbor WISE J072003.20-084651.2
V. D. Ivanov, P. Vaisanen, A. Y. Kniazev +14
The severe crowding towards the Galactic plane suggests that the census of nearby stars in that direction may be incomplete. Recently, Scholz reported a new M9 object at an estimat…
The Luminosities of the Coldest Brown Dwarfs
C. G. Tinney, Jacqueline K. Faherty, J. Davy Kirkpatrick +3
In recent years brown dwarfs have been extended to a new Y-dwarf class with effective temperatures colder than 500K and masses in the range 5-30 Jupiter masses. They fill a crucial…