602 citations
- Institute of CrystallographyIT2 papers
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- Andrews UniversityUS1 paper
- Astronomical Observatory of RomeIT1 paper
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6 papers · 1 filter
The evolutionary status of the bright high-latitude supergiant HD190390
Maarten Reyniers, Jan Cuypers
Despite its mean apparent magnitude of m(v)=6.39, the evolutionary status of HD190390 (HR7671), a luminous F-type supergiant at high galactic latitude, is still not very clear, but…
The Metallicity dependence of the Cepheid Period-Luminosity relation: methodology and results
Marta Mottini, Martino Romaniello, Francesca Primas +3
We present the results of an observational campaign undertaken to assess the influence of the iron content on the Cepheid Period-Luminosity relation. Our data indicate that this de…
Is the solar corona nonmodally self-heated?
B. M. Shergelashvili, A. D. Rogava, S. Poedts
Recently it was pointed out that nonmodally (transiently and/or adiabatically) pre-amplified waves in shear flows, undergoing subsequent viscous damping, can ultimately heat the am…
The mechanism of Swing Absorption of fast magnetosonic waves in inhomogeneous media
B. M. Shergelashvili, T. V. Zaqarashvili, S. Poedts +1
The recently suggested swing interaction between fast magnetosonic and Alfvén waves (2002) is generalized to inhomogeneous media. We show that the fast magnetosonic waves propagati…
[O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars
M. E. van den Ancker, B. Acke, C. P. Dullemond
We present high spectral-resolution optical spectra of 49 Herbig Ae/Be stars in a search for the [O I] 6300.2 A line. The vast majority of the stars in our sample show narrow (FWHM…
AGB stars in the Local Group, and beyond
Martin Groenewegen
I summarize the current status of surveys for late-type M, and Carbon stars in the Local Group based on three different approaches that make use of the characteristics of these sta…