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The outflow history of two Herbig-Haro jets in RCW 36: HH 1042 and HH 1043
L. E. Ellerbroek, L. Podio, L. Kaper +4
Jets around low- and intermediate-mass young stellar objects (YSOs) contain a fossil record of the recent accretion and outflow activity of their parent star-forming systems. We ai…
Multiplicity of massive O stars and evolutionary implications
H. Sana, S. E. de Mink, A. de Koter +7
Nearby companions alter the evolution of massive stars in binary systems. Using a sample of Galactic massive stars in nearby young clusters, we simultaneously measure all intrinsic…
The Initial Mass Function and the Surface Density Profile of NGC 6231
Hwankyung Sung, Hugues Sana, M. S. Bessell
We have performed new wide-field photometry of the young open cluster NGC 6231 to study the shape of the initial mass function (IMF) and mass segregation. We also investigated the…
Binary interaction dominates the evolution of massive stars
H. Sana, S. E. de Mink, A. de Koter +7
The presence of a nearby companion alters the evolution of massive stars in binary systems, leading to phenomena such as stellar mergers, X-ray binaries and gamma-ray bursts. Unamb…
9 Sgr: uncovering an O-type spectroscopic binary with an 8.6 year period
G. Rauw, H. Sana, M. Spano +4
The O-type object 9 Sgr is a well-known synchrotron radio emitter. This feature is usually attributed to colliding-wind binary systems, but 9 Sgr was long considered a single star.…
The long period eccentric orbit of the particle accelerator HD167971 revealed by long baseline interferometry
M. De Becker, H. Sana, O. Absil +2
Using optical long baseline interferometry, we resolved for the first time the two wide components of HD167971, a candidate hierarchical triple system known to efficiently accelera…