Computer Science – Databases
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...445l.145b&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 445, no. 2, p. L145-L148
Computer Science
Databases
14
Dynamic Response, Horizontal Branch Stars, Modal Response, Stability, Stellar Activity, Stellar Models, Stellar Oscillations, Transient Oscillations, Variable Stars, Convection, Convective Flow, Harmonics, Nonlinear Systems
Scientific paper
This Letter investigates the appearance of transient phenomena such as mode switching, pulsation quenching, and pulsattion driving in RR Lyrae and BL Herculis variable stars. We intend to provide a theoretical scenario to be compared with the new homogeneous, accurate, and large photometric databases on light and temperature curves of radial pulsators (MACHO, EROS, and OGLE) which are becoming available. The nonlinear and convective models investigated in this survey present five different types of instability. The location of the transition lines which separate regions of different modal stability inside the instability strip (IS) were thoroughly evaluated. An observational test on the appearance of first-overtone pulsators among BL Herculis stars based on the topology of the intstability regions outlined in the present investigation was also suggested.
Bono Giuseppe
Castellani Vittorio
Stellingwerf Robert F.
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