191 citations · 731 across the 14 of their papers we have counts for
14 papers
Multiplicity of Massive Stars at Low Metallicity: Early Results from the BLOeM Campaign
T. Shenar, J. Bodensteiner, M. Abdul-Masih +73
Massive stars at low metallicity (Z) play a central role in shaping the high-redshift Universe, yet their multiplicity remains poorly constrained. The Binarity at Low Metallicity (…
An absence of binary companions to Wolf-Rayet stars in the Small Magellanic Cloud: implications for mass loss and black hole masses at low metallicity
A. Schootemeijer, T. Shenar, N. Langer +5
In order to predict the black hole mass distributions at high redshift, we need to understand whether very massive single stars ( M) at low metallicity lose their…
Reverse Algols and hydrogen-rich Wolf-Rayet stars from very massive binaries
K. Sen, N. Langer, D. Pauli +6
Massive star feedback affects the evolution of galaxies, where the most massive stars may have the largest impact. The majority of massive stars are born as members of close binary…
Stripped-Envelope Stars in Different Metallicity Environments I. Evolutionary Phases, Classification and Populations
David R. Aguilera-Dena, Norbert Langer, John Antoniadis +5
Massive stars that become stripped of their hydrogen envelope through binary interaction or winds can be observed either as Wolf-Rayet stars, if they have optically thick winds, or…
Immediate dense circumstellar environment of supernova progenitors caused by wind acceleration: its effect on supernova light curves
Takashi J. Moriya, Sung-Chul Yoon, Götz Gräfener +1
Type IIP supernova progenitors are often surrounded by dense circumstellar media that may result from mass-loss enhancement of the progenitors shortly before their explosions. Prev…
Massive stars on the verge of exploding: the properties of oxygen sequence Wolf-Rayet stars
F. Tramper, S. M. Straal, D. Sanyal +7
Context. Oxygen sequence Wolf-Rayet (WO) stars represent a very rare stage in the evolution of massive stars. Their spectra show strong emission lines of helium-burning products, i…
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…
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…
The transition mass-loss rate: Calibrating the role of line-driven winds in massive star evolution
Jorick S. Vink, Götz Gräfener
A debate has arisen regarding the importance of stationary versus eruptive mass loss for massive star evolution. The reason is that stellar winds have been found to be clumped, whi…
Wind Models for Very Massive Stars in the Local Universe
Jorick S. Vink, J. M. Bestenlehner, G. Graefener +2
Some studies have claimed the existence of a stellar upper-mass limit of 150 Msun. A factor that is often overlooked concerns the issue that there might be a significant difference…
The Eddington factor as the key to understand the winds of the most massive stars. Evidence for a Gamma-dependence of Wolf-Rayet type mass loss
G. Gräfener, J. S. Vink, A. de Koter +1
The most massive stars are thought to be hydrogen-rich Wolf-Rayet stars of late spectral subtype (WNh stars). In previous theoretical studies the enhanced mass loss of these stars…
Wind modelling of very massive stars up to 300 solar masses
Jorick S. Vink, L. E. Muijres, B. Anthonisse +3
Some studies have claimed a universal stellar upper-mass limit of 150 Msun. A factor that is often overlooked is that there might be a difference between the current and initial ma…
Spectroscopy and hydrodynamics of dense stellar winds
W. -R. Hamann, G. Graefener, L. M. Oskinova +1
Analyzing the spectra from Wolf-Rayet stars requires adequate non-LTE modeling of their expanding atmosphere. The numerical schemes for solving the radiative transfer in the co-mov…
Comprehensive modelling of the planetary nebula LMC-SMP 61 and its [WC]-type central star
G. Stasińska, G. Gräfener, M. Peña +3
We present a comprehensive study of the Magellanic Cloud planetary nebula SMP 61 and of its nucleus, a Wolf-Rayet type star classified [WC 5-6]. We have performed a detailed spectr…