منابع مشابه
Some recent results for the roAp stars
Three topics are discussed: 1) Photometric observations of the rapidly oscillating Ap stars have shown that the pulsation amplitude drops dramatically as a function of wavelength from the blue to the red. A theoretical derivation, plus modelling, indicate s that this is because the vertical wavelength of the pulsation mode is short compared to the scale height of the atmosphere; in fact, it ind...
متن کاملAbundance analyses of roAp stars
In this sixth paper in a sequence on abundance analyses of roAp stars we present the results for two further members of this group, which are fairly similar and have only a small magnetic field. The analysis of 10 Aql and HD 122970 did not require, for the first time in this long term project, the development of tools and hence was rather straight-forward. We reanalyzed Sm, Eu and Gd in HD 2039...
متن کاملGlycosides of hydroxyproline: some recent, unusual discoveries.
Glycosides of hydroxyproline (Hyp) in the plant cell wall matrix were discovered by Lamport and co-workers in the 1960s. Since then, much has been learned about these Hyp-rich glycoproteins. The intent of this review was to compare and contrast some less common structural motifs, in nontraditional roles, to uncover themes. Arabinosylation of short-peptide plant hormones is essential for growth,...
متن کاملNon-axisymmetric oscillations of roAp stars
We calculate the effect of a strong dipole magnetic field on non-axisymmetric oscillations for roAp stars, with a typical range of photospheric magnetic fields Bp [0.5-1.5] kG. As Dziembowski & Goode (1996), we find that the oscillations are strongly affected by such magnetic fields in two different ways. The first one concerns the stability of modes, which are damped due to dissipation by Alfv...
متن کاملKeynote: Recent Discoveries from Paxos
The rapid decrease in the cost of computing and networks has made fault tolerance much cheaper. The gradual increase in the IQ of system designers is leading to a switch from programming hacks to provably fault-tolerant algorithms. These developments have motivated the resumption of archaeological research on Paxos. Some lower-bound theorems have recently been dug up, along with algorithms that...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2004
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921304004740