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104 papers · 1 filter
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…
Numerical simulations of thin accretion discs with PLUTO
Varadarajan Parthasarathy, Wlodek Kluzniak
Our goal is to perform global simulations of thin accretion discs around compact bodies like neutron stars with dipolar magnetic profile and black holes by exploiting the facilitie…
Simulations of flux variability of oscillating accretion fluid tori around Kerr black holes
Pavel Bakala, Kateřina Goluchová, Eva Šrámková +4
High frequency quasi-periodic oscillations (HF QPOs) are observed in the X-ray power-density spectra (PDS) of several microquasars and low mass X-ray binaries. Many proposed QPO mo…
Intriguing triple-mode RR Lyrae star with period doubling
R. Smolec, I. Soszyński, A. Udalski +11
We report the discovery of an intriguing triple-mode RR Lyrae star found in the OGLE Galactic bulge collection, OGLE-BLG-RRLYR-24137. In the OGLE catalog the star was identified as…
Tensor calculus with open-source software: the SageManifolds project
Eric Gourgoulhon, Michal Bejger, Marco Mancini
The SageManifolds project aims at extending the mathematics software system Sage towards differential geometry and tensor calculus. Like Sage, SageManifolds is free, open-source an…
The HU Aqr planetary system hypothesis revisited
K. Gozdziewski, A. Slowikowska, D. Dimitrov +11
We study the mid-egress eclipse timing data gathered for the cataclysmic binary HU Aquarii during the years 1993-2014. The (O-C) residuals were previously attributed to a single ~7…