Phase-night diagram for periodic variable stars

Phase Diagram for Spinning and Accreting Neutron Stars

Neutron star configurations are considered as thermodynamical systems for which a phase diagram in the angular velocity (Ω) baryon number (N) plane is obtained with a dividing line Ncrit(Ω) for quark core configurations. Trajectories of neutron star evolution in this diagram are studied for different scenarios defined by the external torque acting on the star due to radiation and/or mass accret...

LINEAR PULSATION CHARACTERISTICS OF MIRA VARIABLE STARS

The linear adiabatic pulsation-periods of Mira variable stars have been derived. Approximately 2701[1]models were calculated for M = 0.7 MΘ to 2 MΘ stars with radii from 180 RΘ to 340 RΘ and luminosities from 2800 LΘ to 10,000 LΘ. The chemical composition of all models is (X,Z) = (0.7,0.02). From the result of this study, linear relations on Luminosity-Period-Mass relationship and luminosity-pe...

Exploring the QCD phase diagram with compact stars

D. Blaschke a b H. Grigorian ∗ A. Khalatyan d D. N. Voskresensky e † Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, 141980 Dubna, Russia Fachbereich Physik, Universität Rostock, D-18051 Rostock, Germany Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany Gesellschaft für Schwerion...

Finding outlier light-curves in catalogs of periodic variable stars

We present a methodology to discover outliers in catalogs of periodic light-curves. We use cross-correlation as measure of “similarity” between two individual light-curves and then classify light-curves with lowest average “similarity” as outliers. We performed the analysis on catalogs of variable stars of known type from the MACHO and OGLE projects and established that our method correctly ide...

Phase diagram of the one-dimensional periodic Anderson model