Results 11 to 20 of about 602 (214)
Observational Properties of 155 O- and B-type Massive Pulsating Stars
The Astrophysical Journal Supplement Series, 2023 O- and B-type (OB-type) pulsating stars are important objects for studying the structure and evolution of massive stars through asteroseismology. A large amount of data from various sky surveys provides an unprecedented opportunity to search for and ...
Xiang-dong Shi +5 more
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Frequency stabilities of two pulsating white dwarfs
Open Astronomy, 2000 Sullivan D. J., Sullivan T.
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Parametric study of the flow characteristics and heat transfer from circular intermittent jet impinging on a concave surface [PDF]
Journal of Heat and Mass Transfer Research, 2021 The main purpose of the current work is the analysis of the pulsating effect on the flow and heat transfer from impinging jet on a concave surface. In this way, the heat flux of 2300 W/m2 has been applied constantly on the surface with the radius of ...
Mehran Rajabi Zargarabadi +2 more
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IET Power Electronics, 2023 Pulsating high‐frequency signal injection has the problem of multiple zero‐crossings when the phase current crosses zero‐point, which deteriorates the distortion of high‐frequency current caused by the zero‐current‐clamping effect.
Lisi Tian +4 more
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Solar pulsational stability - II. Pulsation frequencies [PDF]
Monthly Notices of the Royal Astronomical Society, 1992 The processes that damp solar pulsations also influence pulsation frequencies. This creates deviations from frequencies computed assuming adiabatic motion without turbulent stress and is one possible reason why the observed frequencies of the five-minute oscillations do not agree with theoretical eigenfrequencies.
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Fluctuation and extinction of laminar diffusion flame induced by external acoustic wave and source
Scientific Reports, 2021 Acoustic wave can destabilize the flame and has a potential in firefighting, but the influences of the sound source and its frequency are still poorly understood.
Caiyi Xiong +4 more
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The critical frequency in the Stellar pulsation theory [PDF]
Space Science Reviews, 1980 AbstractThe standing oscillation in an isothermal semi-infinite plane-parallel atmosphere has a critical frequency. The significance of critical frequency in the stellar pulsation is discussed briefly. The critical period is calculated for the cepheid instability strip.
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TEMPERATURE CHARACTERISTICS FOR PULSATION FREQUENCY IN GONIONEMUS [PDF]
Journal of General Physiology, 1928 The frequency of contraction of the bell of Gonionemus was studied in relation to temperature, with intact animals and also where different operations were made on the nervous system. A number of values of µ are found for intact animals namely 8,100±, 10,500±, 32,000± and 22,500±, with critical temperatures at 9.6°, 12.3°, and 14.0°.
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High-frequency A-type pulsators discovered using SuperWASP★† [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We present the results of a survey using the WASP archive to search for high frequency pulsations in F-, A- and B-type stars. Over 1.5 million targets have been searched for pulsations with amplitudes greater than 0.5 millimagnitude. We identify over 350 stars which pulsate with periods less than 30 min.
Holdsworth, Daniel L. +20 more
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The puzzle of combination frequencies found in heat‐driven pulsators [PDF]
Astronomische Nachrichten, 2012 AbstractSearching for combinations in the frequency spectra of variable stars is a commonly used method within the asteroseismological community, as harmonics and linear combinations of individual frequencies are expected to appear not only by chance, but also as a characteristic signature linked to different physical phenomena, e.g., nonlinear ...
Pápics, P. I.
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