In the present paper we discuss a selection of facts and questions related to observations and evolutionary calculations of massive single stars and massive stars in interacting binaries. We focus on the surface chemical abundances, the role of stellar winds, the early Be-stars, the high mass X-ray binaries, the effects of rotation on stellar evolution. Finally, we present an unconventionally formed object scenario (a UFO-scenario) of WR binaries in dense stellar environments
Abstract. Although rare, massive stars, being the main sources of ionizing radiation, chemical enric...
Massive stars have a profound influence on the Universe, but their formation remains poorly understo...
In this contribution, I review recent results from observational investigations of early-type binari...
The evolutionary models of massive stars that are widely used in various branches of astronomy are s...
The advent of multi-object spectrographs on 8-10 m class telescopes has provided the opportunity to ...
Massive stars are often found to be in pairs. This configuration is both a blessing and a curse. Fro...
Massive stars have a profound influence on the universe, but their formation remains poorly understo...
Abstract In this chapter I review theoretical models for the formation of very mas-sive stars. After...
The observable characteristics and subsequent evolution of young stellar populations is dominated by...
Abstract In this chapter, after a brief introduction and overview of stellar evolu-tion, we discuss ...
The modelling of massive star evolution is a complex task, and is very sensitive to the way physical...
Massive stars play a crucial role in the Universe. They shape their surroundings by injecting large ...
Context. The evolution of massive stars is not fully understood. The relation between different type...
Massive stars are characterized by a high degree of multiplicity. I will review the results of recen...
Abstract: Before binary components interact, they evolve as single stars do. We therefore first crit...
Abstract. Although rare, massive stars, being the main sources of ionizing radiation, chemical enric...
Massive stars have a profound influence on the Universe, but their formation remains poorly understo...
In this contribution, I review recent results from observational investigations of early-type binari...
The evolutionary models of massive stars that are widely used in various branches of astronomy are s...
The advent of multi-object spectrographs on 8-10 m class telescopes has provided the opportunity to ...
Massive stars are often found to be in pairs. This configuration is both a blessing and a curse. Fro...
Massive stars have a profound influence on the universe, but their formation remains poorly understo...
Abstract In this chapter I review theoretical models for the formation of very mas-sive stars. After...
The observable characteristics and subsequent evolution of young stellar populations is dominated by...
Abstract In this chapter, after a brief introduction and overview of stellar evolu-tion, we discuss ...
The modelling of massive star evolution is a complex task, and is very sensitive to the way physical...
Massive stars play a crucial role in the Universe. They shape their surroundings by injecting large ...
Context. The evolution of massive stars is not fully understood. The relation between different type...
Massive stars are characterized by a high degree of multiplicity. I will review the results of recen...
Abstract: Before binary components interact, they evolve as single stars do. We therefore first crit...
Abstract. Although rare, massive stars, being the main sources of ionizing radiation, chemical enric...
Massive stars have a profound influence on the Universe, but their formation remains poorly understo...
In this contribution, I review recent results from observational investigations of early-type binari...