With a sample of 17 delta Scuti stars belonging to 5 young open clusters, we study correlations between fundamental parameters and the oscillation amplitude...
Seismology of Evolved Beta Scuti Stars and the Binary BQ CNC in the Praesepe Cluster
Three d Scuti stars of Praesepe cluster (BT Cnc, KW 284 and EP Cnc) seem to be at the end of the hydrogen core burning in the subgiant phase. This is supported...
Seismology of Sunspots: An Interplay between Temperature and Magnetic Field Structures
Using a numerical three-dimensional MHD modelling of magneto-acoustic wave propagation in a realistic magnetostatic sunspot model we investigate the influence...
Seismology of Transversely Oscillating Loops Using Periods and Damping Times
Periods and damping times of quasi-mode fundamental kink oscillations have been computed for non-uniform cylindrical models of coronal loops. The radial...
The authors analyze a set of optically faint emission-line galaxies discovered as strong Hα emitters in an objective prism survey (Wamsteker et al, 1985). This...
Selection of a Sample of Suitable Potential Mid-Infrared Calibration Stars from the Hipparcos/Tycho Catalogue
With the increasing availability of sensitive mid-IR area detectors on large telescopes there is a pressing need to increase the number and faintness of mid...