134 citations · 1.2k across the 51 of their papers we have counts for
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Resolving the heart of the Wolf-Rayet binary Apep with ALMA
S. del Palacio, W. Vlemmings, M. Fernández-López +5
The Wolf-Rayet (WR) phase is a critical stage in the evolution of massive stars. During this phase, the stars experience a large mass loss in the form of fast winds that are enrich…
Meerkat measurement of the radio emission from massive stars in the Galactic plane I. Wolf-Rayet stars
Mathilde Tasseroul, Michaël De Becker, Paula Benaglia +1
Massive stars, including Wolf-Rayet stars, are predominantly found in binary systems. These systems are known to emit both thermal emission from stellar winds and, occasionally, no…
Search for radio polarization in the particle-accelerating colliding-wind binaries WR 147 and HD 167971
A. B. Blanco, M. De Becker, P. Benaglia +1
Particle-accelerating colliding-wind binaries (PACWBs) are multiple systems of massive stars in which strong stellar winds collide, accelerating particles to relativistic energies.…
Multiwavelength view of massive binaries
Bharti Arora, Michael De Becker, Jeewan C. Pandey
The high luminosity of massive, early-type stars drives strong stellar winds through line scattering of the stars continuum radiation. Their momenta contribute substantially to the…
Synchrotron Radio Emission as a Proxy to Identify Long Period Massive Binaries
Michael De Becker, Bharti Arora
The multiplicity of massive stars is known to be significantly high. Even though the majority of massive stars are located in binary systems, the census of binaries is biased towar…
A comprehensive X-ray analysis of the massive O-type binary HD93250 over two decades
Bharti Arora, M. De Becker, Jeewan C. Pandey
Massive star winds are known to be responsible for X-ray emission arising from wind plasma heated by the strong shocks up to the temperature of 10--10 K in case of collidin…
High resolution radio imaging of the two Particle-Accelerating Colliding-Wind Binaries HD167971 and HD168112
M. De Becker, B. Marcote, T. Furst +1
The colliding-wind region in binary systems made of massive stars allows us to investigate various aspects of shock physics, including particle acceleration. Particle accelerators…
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Westerlund 1 and 2 Open Clusters Survey
M. G. Guarcello, E. Flaccomio, J. F. Albacete-Colombo +48
Context. With a mass exceeding several 10^4 solar masses and a rich and dense population of massive stars, supermassive young star clusters represent the most massive star-forming…
Resolved astrometric orbits of ten O-type binaries
J. -B. Le Bouquin, H. Sana, E. Gosset +11
Our long term aim is to derive model-independent stellar masses and distances for long period massive binaries by combining apparent astrometric orbit with double-lined radial velo…
Search for magnetic fields in particle-accelerating colliding-wind binaries
C. Neiner, J. Grunhut, B. Leroy +2
Some colliding-wind massive binaries, called particle-accelerating colliding-wind binaries (PACWB), exhibit synchrotron radio emission, which is assumed to be generated by a stella…
V444 Cyg X-ray and polarimetric variability: Radiative and Coriolis forces shape the wind collision region
Jamie R. Lomax, Yael Naze, Jennifer L. Hoffman +8
We present results from a study of the eclipsing, colliding-wind binary V444 Cyg that uses a combination of X-ray and optical spectropolarimetric methods to describe the 3-D nature…
The XMM-Newton view of the yellow hypergiant IRC +10420 and its surroundings
M. De Becker, D. Hutsemékers, E. Gosset
Among evolved massive stars likely in transition to the Wolf-Rayet phase, IRC +10420 is probably one of the most enigmatic. It belongs to the category of yellow hypergiants and it…
The feedback of massive stars on interstellar astrochemical processes
Michael De Becker
Astrochemistry is a discipline that studies physico-chemical processes in astrophysical environments. Such environments are characterized by conditions that are substantially diffe…
WR 138: new results from X-ray and optical spectroscopy
M. Palate, G. Rauw, M. De Becker +2
Context. Massive-binary evolution models predict that some systems will go through an evolutionary phase where the original primary has become a supernova and left a compact object…
Three-dimensional orbits of the triple-O stellar system HD 150136
H. Sana, J. -B. Le Bouquin, L. Mahy +3
Context. HD 150136 is a triple hierarchical system and a non-thermal radio emitter. It is formed by an O3-3.5 V + O5.5-6 V close binary and a more distant O6.5-7 V tertiary. So far…
A spectroscopic investigation of the O-type star population in four Cygnus OB associations. I. Determination of the binary fraction
L. Mahy, G. Rauw, M. De Becker +2
Context. Establishing the multiplicity of O-type stars is the first step towards accurately determining their stellar parameters. Moreover, the distribution of the orbital paramete…
The 2.35 year itch of Cyg OB2 #9. II. Radio monitoring
R. Blomme, Y. Naze, D. Volpi +5
Cyg OB2 #9 is one of a small set of non-thermal radio emitting massive O-star binaries. The non-thermal radiation is due to synchrotron emission in the colliding-wind region. Cyg O…
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…
Evidence for a physically bound third component in HD 150136
L. Mahy, E. Gosset, H. Sana +4
Context. HD150136 is one of the nearest systems harbouring an O3 star. Although this system was for a long time considered as binary, more recent investigations have suggested the…
The non-thermal radio emitter HD 93250 resolved by long baseline interferometry
H. Sana, J. -B. Le Bouquin, M. De Becker +3
As the brightest O-type X-ray source in the Carina nebula, HD 93250 (O4 III(fc)) is X-ray overluminous for its spectral type and has an unusually hard X-ray spectrum. Two different…
Non-thermal radio emission from O-type stars. IV. Cyg OB2 No. 8A
R. Blomme, M. De Becker, D. Volpi +1
We study the non-thermal radio emission of the binary Cyg OB2 No. 8A, to see if it is variable and if that variability is locked to the orbital phase. We investigate if the synchro…
First orbital solution for the non-thermal emitter Cyg OB2 #9
Y. Naze, Y. Damerdji, G. Rauw +7
After the first detection of its binary nature, the spectroscopic monitoring of the non-thermal radio emitter Cyg OB2 #9 (P=2.4yrs) has continued, doubling the number of available…
New findings on the prototypical Of?p stars
Y. Naze, A. ud-Doula, M. Spano +3
In recent years several in-depth investigations of the three Galactic Of?p stars were undertaken. These multiwavelength studies revealed the peculiar properties of these objects (i…