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The incidence of stellar mergers and mass gainers among massive stars
S. E. de Mink, H. Sana, N. Langer +2
Because the majority of massive stars are born as members of close binary systems, populations of massive main-sequence stars contain stellar mergers and products of binary mass tr…
On the nature of the WO3 star DR1 in IC 1613
F. Tramper, G. Gräfener, O. E. Hartoog +8
We present the results of a quantitative spectroscopic analysis of the oxygen-sequence Wolf- Rayet star DR1 in the low-metallicity galaxy IC 1613. Our models suggest that the stron…
The ages of young star clusters, massive blue stragglers and the upper mass limit of stars: analysing age dependent stellar mass functions
Fabian R. N. Schneider, Robert G. Izzard, Selma E. de Mink +7
Massive stars rapidly change their masses through strong stellar winds and mass transfer in binary systems. We show that such mass changes leave characteristic signatures in stella…
On the nature of WO stars: a quantitative analysis of the WO3 star DR1 in IC 1613
F. Tramper, G. Gräfener, O. E. Hartoog +8
Context. Oxygen sequence Wolf-Rayet (WO) stars are thought to represent the final evolutionary stage of the most massive stars. The characteristic strong O vi emission possibly ori…
Rotational properties of the O-type star population in the Tarantula region
O. H. Ramírez-Agudelo, S. Simón-Díaz, H. Sana +15
The 30 Doradus (30\,Dor) region in the Large Magellanic Cloud (also known as the Tarantula Nebula) is the nearest massive starburst region, containing the richest sample of massive…
Early Disc Accretion as the Origin of Abundance Anomalies in Globular Clusters
N. Bastian, H. J. G. L. M. Lamers, S. E. de Mink +3
Globular clusters (GCs), once thought to be well approximated as simple stellar populations (i.e. all stars having the same age and chemical abundance), are now known to host a var…
The VLT-FLAMES Tarantula Survey XII. Rotational velocities of the single O-type stars
O. H. Ramírez-Agudelo, S. Simón-Díaz, H. Sana +15
Aims. Using ground based multi-object optical spectroscopy obtained in the framework of the VLT-FLAMES Tarantula Survey (VFTS), we aim to establish the (projected) rotational veloc…
Hubble Tarantula Treasury Project: Unraveling Tarantula's Web. I. Observational overview and first results
E. Sabbi, J. Anderson, D. J. Lennon +18
The Hubble Tarantula Treasury Project (HTTP) is an ongoing panchromatic imaging survey of stellar populations in the Tarantula Nebula in the Large Magellanic Cloud that reaches int…
Wind Roche-lobe overflow: Application to carbon-enhanced metal-poor stars
C. Abate, O. R. Pols, R. G. Izzard +2
Carbon-enhanced metal-poor stars (CEMP) are observed as a substantial fraction of the very metal-poor stars in the Galactic halo. Most CEMP stars are also enriched in s-process ele…