The K I 7699-A resonance absorption line was used to observe a group of 18 early-type stars within a 200-pc radius of the sun with a signal-to-noise ratio of 50...
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PublicationObservation of fine structure in the cold phase of the local interstellar medium using K I absorption
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PublicationObservations of three BL Lacertae objects - Constraints on inhomogeneous relativistically beamed jet models
Multifrequency observations are presented of three BL Lac objects, including the first UV measurements of 0912 + 297 and 1219 + 285. An eight day optical flare...
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PublicationOn the application of iteration factors for temperature correction in stellar atmospheres
The authors present an improved iterative method for deriving temperature corrections in stellar atmospheres. At each step of iteration, the procedure computes...
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PublicationOn the chemodynamics of Wolf-Rayet ring nebulae - NGC 6888
Results of a chemodynamical study of the W-R ring nebula NGC 6888 around the WN6 star WR 136 are presented; the observations combine high spatial and spectral...
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PublicationOn the massive star-forming capacity of molecular clouds
Assuming that photoionization is the self-limiting process for continued star formation, we estimate the maximum number of massive (OB) stars that can form...
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PublicationOn the O/Fe versus Fe/H relationship and the progenitors of type I supernovae
The new observational O/Fe versus Fe/H abundance relationship for halo stars is studied in terms of several models of chemical evolution for the solar...
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PublicationOn the supersonic turbulence of NGC 604
Two-dimensional high spatial resoultion Fabry-Perot observations with TAURUS 2 at the William Herschel Telescope in La Palma, over the inner central regions of...
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PublicationOn the temperature and velocity through the photosphere of a sunspot penumbra
We investigate the structure in depth of a sunspot penumbra by means of the inversion code of the radiative transfer equation proposed by Ruiz Cobo & del Toro...
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PublicationOptical photometry and polarimetry and infrared photometry of 3C 345 in outburst
We present V-band CCD photometry, UBVRI photopolarimetry, and near simultaneous JHK photometry of 3C 345 during a renewed outburst in spring of 1992, which...