The beat Cepheids in the Magellanic Clouds: an analysis from the EROS-2 database (2009)
Marquette, J. B., Beaulieu, J. P., Buchler, J. R., Szabo, R., Tisserand, P., Belghith, S., ...
A number of microlensing dark-matter surveys have produced tens of millions of light curves of individual background stars. These data provide an unprecedented opportunity for systematic studies of...
J. R. Buchler, Z. Kolláth, J. P. Beaulieu, M. J. Goupil, Observatoire De Paris
The observed Magellanic Cloud (MC) Cepheid data pose a new challenge to both stellar structure and stellar evolution. The Fourier analysis of the LMC and SMC data indicate that the 2�1 resonance (P...
On the Role of Resonances in Nonradial Pulsators (2007)
A&A manuscript no. (will be inserted by hand later) Your thesaurus codes are:
. We review some of the recent advances in nonlinear pulsation theory, but also insist on some of the major extant shortcomings. 1. Introduction It is a great pleasure for me to dedicate this lecture...
Szabo, R., Kollath, Z., Buchler, J. R.
We describe a methodology that allows us to follow the pulsational behavior of an RR Lyrae model consistently and automatically along its evolutionary track throughout the whole instability strip. It...
Nonlinear Beat Cepheid and RR Lyrae Models (2001)
Kollath, Z., Buchler, J. R., Szabo, R., Csubry, Z.
The numerical hydrodynamic modelling of beat Cepheid behavior has been a long standing quest in which purely radiative models had failed consistently. We find that beat pulsations occur naturally...
Cepheid Mass-Luminosity Relations from the Magellanic Clouds (2000)
Beaulieu, J. P., Buchler, J. R., Kollath, Z.
The OGLE data base is used in conjunction with Kurucz atmosphere models to generate sets of period, effective temperature and luminosity for fundamental and overtone Magellanic Cloud Cepheids. The...
Turbulent Convective Cepheid Models: Linear Properties (1998)
Yecko, P. A., Kollath, Z., Buchler, J. R.
A one-dimensional turbulent convection model in the form of a time-dependent diffusion equation for the turbulent energy is incorporated into our numerical pulsation code. The effect of turbulent...
Nonlinear Beat Cepheid Models (1998)
Kollath, Z., Beaulieu, J. P., Buchler, J. R., Yecko, P.
The numerical hydrodynamic modelling of beat Cepheid behavior has been a longstanding quest in which purely radiative models have failed miserably. We find that beat pulsations occur naturally when...
Modelling the Phase-Locked Pulsations of a P=14d EROS Star (1997)
Kollath, Z., Buchler, J. R., Beaulieu, J. P., Goupil, M. J.
The Fourier spectral analysis of this object suggests a nonlinear pulsation of period approximately 14d with a 3:2 frequency lock between two vibrational modes. We discuss an extensive search that we...
Analysis of the Irregular Pulsations of AC Her (1997)
Kollath, Z., Buchler, J. R., Serre, T., Mattei, J.
The AAVSO lightcurve data of the irregularly pulsating star AC Herculis of the RV Tau class are analysed. The lightcurve is shown to be incompatible with a periodic, or even multiperiodic pulsation,...
The Nature of Strange Modes in Classical Variable Stars (1997)
Buchler, J. R., Yecko, P. A., Kollath, Z.
Strange modes have been found in the radial spectrum of many luminous stars, most recently in Cepheids and RR Lyrae. We show that there is nothing strange about these modes -- they must exist even in...