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Long-term Periodicities of Cataclysmic Variables with Synoptic Surveys
Michael Ting-Chang Yang, Yi Chou, Chow-Choong Ngeow +12
A systematic study on the long-term periodicities of known Galactic cataclysmic variables (CVs) was conducted. Among 1580 known CVs, 344 sources were matched and extracted from the…
PTF1 J085713+331843, a new post common-envelope binary in the orbital period gap of cataclysmic variables
J. van Roestel, P. J. Groot, D. Levitan +6
We report the discovery and analysis of PTF1 J085713+331843, a new eclipsing post common-envelope detached white-dwarf red-dwarf binary with a 2.5h orbital period discovered by the…
Photometric variability of candidate white dwarf binary systems from Palomar Transient Factory archival data
Wil Kao, David L. Kaplan, Thomas A. Prince +6
We present a sample of 59 periodic variables from the Palomar Transient Factory, selected from published catalogues of white dwarf (WD) candidates. The variability can likely be at…
Why are rapidly rotating M dwarfs in the Pleiades so (infra)red? New period measurements confirm rotation-dependent color offsets from the cluster sequence
Kevin R. Covey, Marcel A. Agüeros, Nicholas M. Law +6
Stellar rotation periods measured in open clusters have proved to be extremely useful for studying stars' angular momentum content and rotationally driven magnetic activity, which…
The fastest unbound star in our Galaxy ejected by a thermonuclear supernova
S. Geier, F. Fürst, E. Ziegerer +17
Hypervelocity stars (HVS) travel with velocities so high, that they exceed the escape velocity of the Galaxy. Several acceleration mechanisms have been discussed. Only one HVS (US…