Middle and far infrared studies of the irregular galaxy M 82 and of Seyfert galaxies are presented. M 82 was observed spectrophotometrically from 8 to 13...
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PublicationInfrared studies of Seyfert galaxies and of the irregular galaxy M 82
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PublicationInfrared variability of symbiotic stars
Binary models of symbiotic stars are discussed, analyzing the results of recent IR observations. It is indicated that a binary must have component masses of...
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PublicationIntrinsic parameters of galactic luminous OB stars
We present the results of a spectroscopic analysis of 25 galactic luminous OB stars. The gravities are in general lower than previously assumed, especially for...
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PublicationIRAS 17423-1755: A BQ() star with a variable velocity outflow
Infrared Astronomy Satellite (IRAS) 17423-1755 has been identified as a BQ() star. Its more remarkable observed features are large radial velocities, huge line...
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PublicationLithium abundances in metal-deficient dwarfs
New measurements of the lithium abundance in a sample of 37 field dwarfs of low metallicity (-0.6 ≥ [Fe/H] ≥ 3.2) are presented. Combining these observations...
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PublicationLithium in T Tauri stars
The lithium abundance in 26 T Tauri stars is derived using data taken at the Isaac Newton Telescope and data from literature. The aim is to understand the...
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TalkLiving with a red dwarf: X-ray and UV emissions of red dwarf stars and effects on hosted planets and their suitability for life
Red Dwarf (dM) stars are the most numerous stars in our Galaxy. These faint, cool, long-lived, and low mass stars make up > 80% of all stars in the Universe...
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PublicationMagnetic and Rotational Evolution of ρ CrB from Asteroseismology with TESS
During the first half of main-sequence lifetimes, the evolution of rotation and magnetic activity in solar-type stars appears to be strongly coupled. Recent...
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TalkMILES: population synthesis for the 21st century
We present the new stellar population synthesis models based on the empirical stellar spectral library MILES, which can be regarded nowadays as standard in the...