Results 11 to 20 of about 1,827 (268)
The Astrophysical Journal, 1990 Near-discontinuities in the density of a star, such as that encountered in the transition between a chromosphere and a corona, reflect acoustic waves and thereby partially contain them within the star. These reflections help to establish a resonant acoustic cavity with discrete characteristic frequencies, even for modes with frequencies above the ...
Neil Balmforth, Douglas Gough
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A new method for the spectroscopic identification of stellar non-radial pulsation modes [PDF]
, 2006 Aims. We present the Fourier parameter fit method, a new method for spectroscopically identifying stellar radial and non-radial pulsation modes based on the high-resolution time-series spectroscopy of absorption-line profiles.
W. Zima
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Plenary talk - Stellar pulsation: an overview [PDF]
Communications in Asteroseismology, 2007 Twenty-ve hundred years ago the Pythagorean Brotherhood invented the idea of the Music of the Spheres. That idea languished in scientic thought from the time of Kepler 400 years ago, until the 1970s when real sounds were found and recognised in the sun and stars.
D. W. Kurtz
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Current problems in stellar pulsation theory
, 2019 The last decade lead to major progress in asteroseismology and stellar physics with the advent of space missions. Thanks to the richness and precision of current oscillation spectra, sophisticated seismic probing techniques allow us now to pinpoint the limits of our current models of stellar structure and evolution. However, the accuracy of the seismic
Marc-Antoine Dupret
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Pulsation Analysis of High-Amplitude δ Scuti Stars with TESS [PDF]
Research in Astronomy and Astrophysics, 2023 In this work, the pulsation analysis is performed on 83 high-amplitude δ Scuti stars (HADS), which have been observed by the Transiting Exoplanet Survey Satellite.
Wangjunting 王俊婷 Xue 薛 +3 more
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Parameters and Pulsation Constant of Cepheid
Particles, 2023 The analysis of fifty empirical period-radius relations and forty-three empirical period-luminosity relations is performed for the Cepheids. It is found that most of these relations have significant systematic errors.
Sergei V. Sinitsyn
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Asteroseismic Observations of Hot Subdwarfs
Frontiers in Astronomy and Space Sciences, 2021 There are a number of reasons for studying hot subdwarf pulsation; the most obvious being that these stars remain a poorly understood late-stage of stellar evolution and knowledge of their interior structure, which pulsation studies reveal, constrains ...
A. E. Lynas-Gray +2 more
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Constraining stellar evolution theory with asteroseismology of γ Doradus stars using deep learning [PDF]
Astronomy & Astrophysics, 2021 Context. The efficiency of the transport of angular momentum and chemical elements inside intermediate-mass stars lacks proper calibration, thereby introducing uncertainties on a star’s evolutionary pathway.
J. Mombarg, T. V. Reeth, C. Aerts
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Blue supergiants as tests for stellar physics [PDF]
Astronomy & Astrophysics, 2021 Context. Massive star evolution is still poorly understood, and observational tests are required to discriminate between different implementations of physical phenomena in stellar evolution codes. Aims.
C. Georgy, H. Saio, G. Meynet
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Stellar pulsation and granulation as noise sources in exoplanet transit spectroscopy in the ARIEL space mission [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Stellar variability from pulsations and granulation presents a source of correlated noise that can impact the accuracy and precision of multiband photometric transit observations of exoplanets.
Subhajit Sarkar +4 more
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