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Stellar variability may originate from various phenomena such as binarity, pulsations, or rotation. These mechanisms can induce flux variations of similar magnitudes, shapes, and periods. We aim to determine mechanisms responsible for the…

Solar and Stellar Astrophysics · Physics 2026-03-11 E. Šipková , M. Skarka , M. Vaňko , V. Chmelař , T. Pribulla , Z. Mikulášek

The stellar evolution theory of massive stars remains uncalibrated with high-precision photometric observational data mainly due to a small number of luminous stars that are monitored from space. Automated all-sky surveys have revealed…

Solar and Stellar Astrophysics · Physics 2017-02-08 Jaan Laur , Indrek Kolka , Tõnis Eenmäe , Taavi Tuvikene , Laurits Leedjärv

The O- and B-type (OB-type) pulsating stars are important objects to study the structure and evolution of massive stars through asteroseismology. A large amount of data from various sky surveys provide an unprecedented opportunity to search…

Solar and Stellar Astrophysics · Physics 2024-12-06 Xiang-dong Shi , Sheng-bang Qian , Li-ying Zhu , Liang Liu , Lin-jia Li , Lei Zang

Pulsar search is always the basis of pulsar navigation, gravitational wave detection and other research topics. Currently, the volume of pulsar candidates collected by Five-hundred-meter Aperture Spherical radio Telescope (FAST) shows an…

Instrumentation and Methods for Astrophysics · Physics 2023-11-15 Zi-Yi You , Yun-Rong Pan , Zhi Ma , Li Zhang , Shuo Xiao , Dan-Dan Zhang , Shi-Jun Dang , Ru-Shuang Zhao , Pei Wang , Ai-Jun Dong , Jia-Tao Jiang , Ji-Bing Leng , Wei-An Li , Si-Yao Li

We present some results of long term studies of pulsating stars conducted in the course of the OGLE and Araucaria projects. In particular very scarce eclipsing binaries containing pulsating stars are discussed. Such systems provide a unique…

Solar and Stellar Astrophysics · Physics 2015-06-18 Grzegorz Pietrzynski

We are developing a 3D radiation hydrodynamics code to simulate the interaction of convection and pulsation in classical variable stars. One key goal is the ability to carry these simulations to full amplitude in order to compare them with…

Solar and Stellar Astrophysics · Physics 2015-05-27 Chris M. Geroux , Robert G. Deupree

There are different classes of pulsating stars in the H-R diagram. While many of those classes are undisputed, some remain a mystery such as the objects historically called "Maia variables". Whereas the presence of such a class was…

Solar and Stellar Astrophysics · Physics 2024-09-13 F. Kahraman Aliçavuş , G. Handler , S. Chowdhury , E. Niemczura , R. Jayaraman , P. De Cat , D. Ozuyar , F. Aliçavuş

Space-based photometry has substantially increased the number of pulsating stars found in binary systems by more than four orders of magnitude. Combined with high-resolution spectroscopy, high-precision photometry offers model-independent…

Instrumentation and Methods for Astrophysics · Physics 2025-12-18 Ema Šipková , Alex Kemp , Dario Fritzewski , Andrew Tkachenko , Dominic M. Bowman , Conny Aerts , Jasmine Vrancken

We review ways in which observations of the changing periods of pulsating variable stars can be used to detect and directly measure their evolution. We briefly describe the two main techniques of analysis -- (O-C) analysis and wavelet…

Solar and Stellar Astrophysics · Physics 2016-11-10 Hilding R. Neilson , John R. Percy , Horace A. Smith

Regular intrinsic brightness variations observed in many stars are caused by pulsations. These pulsations provide information on the global and structural parameters of the star. The pulsation periods range from seconds to years, depending…

Pulsating stars are remarkable objects for stellar astrophysics. Their pulsation frequencies allow us to probe the internal structure of stars. One of the most known groups of pulsating stars is $\delta$ Scuti variables which could be used…

Solar and Stellar Astrophysics · Physics 2022-08-26 O. Kirmizitas , S. Cavus , F. Kahraman Aliçavuş}

In addition to coherent pulsation, many accreting neutron stars exhibit flaring activity and strong aperiodic variability on time scales similar to or shorter than their pulsation period. Such a behavior shows that the accretion flow in the…

High Energy Astrophysical Phenomena · Physics 2015-03-19 D. Klochkov , A. Santangelo , R. Staubert , R. E. Rothschild

We present results from the first two quarters of a survey to search for pulsations in compact stellar objects with the Kepler spacecraft. The survey sample and the various methods applied in its compilation are described, and spectroscopic…

After a brief introduction into the asteroseismic modelling of stars, we provide a compilation of the current seismic estimates of the core overshooting parameter and of the rotational frequency of single and binary massive stars. These…

Solar and Stellar Astrophysics · Physics 2014-03-05 Conny Aerts

Variable stars in stellar clusters can offer key constraints on stellar evolution and pulsation models, utilising estimates of host cluster properties to constrain stellar physical parameters. We present a catalogue of 86 luminous…

Long-period variables are bright, evolved red giant stars showing periodic photometric changes due to stellar pulsation. They follow one or more period-luminosity and period-age relations, which make them highly promising distance…

Solar and Stellar Astrophysics · Physics 2024-11-20 Michele Trabucchi

To answer the topical question we survey synoptically the recent literature in pulsation theory. We restrict the topics to research on roAp stars, EC 14026 variables, strange modes, luminous blue variables, pulsation-rotation coupling, and…

Astrophysics · Physics 2007-05-23 Alfred Gautschy

During the post-main sequence evolution massive stars pass through several short-lived phases, in which they experience enhanced mass loss in the form of clumped winds and mass ejection events of unclear origin. The discovery that stars…

We present an overview of pulsating stars in close binaries, focusing on the question what role the dupliticity plays in triggering and/or modifying stellar oscillations and on how it can help us to interpret the oscillatory behaviour of…

Astrophysics · Physics 2007-05-23 Conny Aerts , Petr Harmanec

We present results of a Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed in years 1 and 3 of the TESS mission, during which the southern ecliptic hemisphere was targeted. We…

Solar and Stellar Astrophysics · Physics 2023-01-11 A. S. Baran , V. Van Grootel , R. H. Ostensen , H. L. Worters , S. K. Sahoo , S. Sanjayan , S. Charpinet , P. Nemeth , J. H. Telting , D. Kilkenny