@article{10272/15274,
year = {2017},
url = {http://hdl.handle.net/10272/15274},
abstract = {We report the results of long-term time series photometry on RX J2133.7+5107, an intermediate polar distinguished by its long orbital period (7.14 h) and rapid rotation (571 s) of its white dwarf. The light curves show the presence of a conspicuous modulation with a 6.72-h period, 6.1 ± 0.1 per cent shorter than the orbital period, which we interpret as a (negative) superhump associated with the nodal precession of the accretion disc. This detection may prove a challenge to the idea that superhumps are limited to binaries of short orbital period. Our rotational timings over the 7 yr spanned by our observations show spin-up at a rate of 3.41(2) ms yr-1 or, equivalently, on a time-scale
|P/P?|=0.17×106
 yr. The latter is sensibly shorter than the time-scale of spin period variations reported for other intermediate polars, possibly due to a greater accretion rate.},
organization = {We thank the National Science Foundation for support of this research (AST-1211129 and AST-1615456), and NASA through HST-G0-13630. EdM acknowledges financial support from the Ministerio de Educacion, Cultura y Deporte (Spain) under the Mobility Program Salvador de Madariaga (PRX15/00521).},
publisher = {Oxford University Press},
keywords = {Accretion},
keywords = {Accretion discs},
keywords = {Binaries},
keywords = {Close},
keywords = {Close},
keywords = {Stars},
keywords = {Individual},
keywords = {RX J2133.7+5107},
keywords = {Novae},
keywords = {Cataclysmic variables},
title = {Superhumps and spin-period variations in the intermediate polar RX J2133.7+5107},
doi = {10.1093/mnras/stx107},
author = {Miguel Agustino, Enrique de and Patterson, Joseph and Myers, J.},
}