منابع مشابه
Rapidly oscillating Ap stars versus non-oscillating Ap stars
The positions in the HR diagram and the kinematic characteristics of rapidly oscillating and non-oscillating chemically peculiar stars are obtained using new Hipparcos proper motions and parallaxes, and our own radial velocity measurements. We find that rapidly oscillating stars, as a group, are (−0.47±0.34) mag above the zero-age main sequence (ZAMS), while the non-oscillating stars are (−1.20...
متن کاملAsteroseismic theory of rapidly oscillating Ap stars
The present paper reviews some of the important advances made over the last decade concerning theory of roAp stars.
متن کاملEvidence for Magnetic Flux Saturation in Rapidly Rotating M Stars
We present magnetic flux measurements in seven rapidly rotating M dwarfs. Our sample stars have X-ray and H-alpha emission indicative of saturated emission, i.e., emission at a high level independent of rotation rate. Our measurements are made using near-infrared FeH molecular spectra observed with HIRES at Keck. Because of their large convective overturn times, the rotation velocity of M stars...
متن کاملSeismic tests of the structure of rapidly oscillating Ap stars : HR 1217
HR 1217 is probably the best studied multiperiodic rapidly oscillating Ap star, which makes this star a test case for the seismic analysis of these complex stars. In this paper, we combine the observational data available for HR 1217 and use these data to constrain theoretical models appropriate for this star. In particular, we try to establish which unknown model parameters are the most releva...
متن کاملBand-limited interpolation applied to the time series of rapidly oscillating stars
We reconstruct the temporal Fourier spectra obtained from incomplete records of the luminosities of rapidly oscillating stars. This reconstruction involves a deterministic procedure related to `band-limited interpolation'. We show that the stability of the underlying deconvolution process is governed by the choice of the frequency intervals over which the restoration has to be achieved. A `time...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2000
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2000.03127.x