134 citations · 1.2k across the 51 of their papers we have counts for
55 papers
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…
The influence of free-free absorption on the radio spectrum of Particle-Accelerating Colliding-Wind Binaries
Michaël De Becker, Agustina Belen Blanco, Mathilde Tasseroul +4
The study of massive stars in binary and higher-multiplicity systems that participate in particle acceleration is a key topic at the crossroads of massive star physics, shock physi…
Enabling population studies on wind-driven Galactic binary systems
B. Marcote, P. Benaglia, V. Bosch-Ramon +8
Galactic binaries driven by stellar wind shocks, such as colliding wind binaries (CWBs) and gamma-ray binaries (gBs), harbor one of the most efficient particle acceleration engines…
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.…
Study of Wolf-Rayet stars using uGMRT
Anindya Saha, Anandmayee Tej, Santiago del Palacio +4
In recent years, systems involving massive stars with large wind kinetic power have been considered as promising sites for investigating relativistic particle acceleration in low r…
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…
Investigating the Role of Pre-supernova Massive Stars in the Acceleration of Galactic Cosmic Rays
Michael De Becker, Santiago del Palacio, Paula Benaglia +5
Galactic cosmic rays (GCRs) constitute a significant part of the energy budget of our Galaxy, and the study of their accelerators is of high importance in modern astrophysics. Thei…
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…
Search for particle acceleration in two massive Wolf-Rayet stars using uGMRT observations
Anindya Saha, Anandmayee Tej, Santiago del Palacio +4
Large wind kinetic power of Wolf-Rayet (WR) stars make them ideal targets in low radio frequencies to search for non-thermal emission due to relativistic particle acceleration. In…
Confirmation of two magnetic cataclysmic variables as polars: 1RXS J174320.1-042953 and YY Sex
Nikita Rawat, J. C. Pandey, Arti Joshi +5
We present our analysis of new and archived observations of two candidate magnetic cataclysmic variables, namely 1RXS J174320.1-042953 and YY Sex. 1RXS J174320.1-042953 was observe…
Evidence for non-thermal X-ray emission from the double WR colliding-wind binary Apep
S. del Palacio, F. García, M. De Becker +5
Context: Massive colliding-wind binaries (CWBs) can be non-thermal sources. The emission produced in their wind-collision region (WCR) encodes information of both the shocks proper…
The non-thermal emission from the colliding-wind binary Apep
S. del Palacio, P. Benaglia, M. De Becker +2
The recently discovered massive binary system Apep is the most powerful synchrotron emitter among the known Galactic colliding-wind binaries. This makes this particular system of g…
Quest for the upcoming periastron passage of an episodic dust maker and particle accelerating colliding wind binary: WR 125
Bharti Arora, J. C. Pandey, M. De Becker +4
We have carried out a long term infrared and X-ray investigation of the colliding wind binary WR 125 (WC7+O9III). The source was monitored using AstroSat-Soft X-ray Telescope and T…
An investigation into the fraction of particle accelerators among colliding-wind binaries. Towards an extension of the catalogue
M. De Becker, P. Benaglia, G. E. Romero +1
Particle-accelerating colliding-wind binaries (PACWBs) are multiple systems made of early-type stars able to accelerate particles up to relativistic velocities. The relativistic pa…
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…
Long-term XMM-Newton investigation of two particle-accelerating colliding-wind binaries in NGC6604: HD168112 and HD167971
M. De Becker
The long-term (over more than one decade) X-ray emission from two massive stellar systems known to be particle accelerators is investigated using XMM-Newton. Their X-ray properties…
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…