Spectrograms of a sample of nitrogen-rich early type stars (OBN stars) are analyzed differentially to normal stars of similar spectral types by means of NLTE...
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PublicationA non-LTE stellar atmosphere study of nitrogen-rich early-type stars
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PublicationA remarkable feature in the giant extragalactic H II region NGC 5471
The discovery of a very high velocity, low-intensity gas feature in the giant extragalactic H II region NGC 5471 is reported. A broad component in the emission...
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PublicationCondensation of dust around the Wolf-Rayet star WR 125
Infrared photometry of the WC7-type Wolf-Rayet star WR 125 (MR 93) in 1981-91 shows a 10-fold rise in the 3-4 micron flux during 1990-91. This, together with...
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NewsContinuous infrared winds discovered during the eruption of a stellar mass black hole
A team of researchers from the Instituto de Astrofísica de Canarias (IAC) has detected for the first time the constant infrared emission from winds produced...
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PublicationEvolution of supernova remnants inside preexisting wind-driven cavities
The evolution of supernova remnants in preexisting cavities is examined by means of 1D and 2D numerical studies of the phenomenon and the fragmentation of...
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PublicationEvolutionary versus dynamical time scales for the evolution of the central stars of planetary nebulae
The disagreement between evolutionary and dynamical time scales for the evolution of the central stars of planetary nebulae (CSPN) through the H-R diagram is...
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PublicationEvolved massive stars in giant H II regions: the chemical enrichment prior to SN events.
Massive stars have significant effects on the ambient interstellar medium (ISM) via either strong UV radiation or powerful stellar winds. These winds also...
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PublicationGas kinematics in the nucleus of NGC 6946
A complex kinematical structure is inferred from the analysis of high resolution spectra of the nuclear region of the galaxy NGC 6946. The spatial resolution of...
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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...