231 citations · 1.4k across the 46 of their papers we have counts for
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The onset of stellar multiplicity in massive star formation: A search for low-mass companions of massive young stellar objects with -band adaptive optics imaging
E. Bordier, W. -J. de Wit, A. J. Frost +3
Given the high incidence of binaries among mature field massive stars, it is clear that multiplicity is an inevitable outcome of high-mass star formation. Understanding how massive…
On the origin of close massive binaries in the M17 star-forming region
E. Bordier, A. J. Frost, H. Sana +5
Spectroscopic multiplicity surveys of O stars in young clusters and OB associations have revealed that a large portion ( 70%) of these massive stars (M 15 $M_{\od…
VLTI-MATISSE L- and N-band aperture-synthesis imaging of the unclassified B[e] star FS Canis Majoris
K. -H. Hofmann, A. Bensberg, D. Schertl +58
Context: FS Canis Majoris (FS CMa, HD 45677) is an unclassified B[e] star surrounded by an inclined dust disk. The evolutionary stage of FS CMa is still debated. Perpendicular to t…
The contribution by luminous blue variable stars to the dust content of the Magellanic Clouds
C. Agliozzo, N. Phillips, A. Mehner +6
(Shortened) Luminous blue variable stars (LBVs) form dust as a result of episodic, violent mass loss. To investigate their contribution as dust producers in the Magellanic Clouds,…
Tying the geometrical traits of massive young stellar objects and their discs to a potential evolutionary sequence using infrared observations
A. J. Frost, R. D. Oudmaijer, S. L. Lumsden +1
Young massive stars influence their surroundings from local to galactic scales, but the observational challenges associated with their distance and embedded nature has, until the r…
A sextet of clusters in the Vela OB2 region revealed by Gaia
Giacomo Beccari, Henri M. J. Boffin, Tereza Jerabkova +5
Using Gaia DR2 data, combined with OmegaCAM ground-based optical photometry from the AD-HOC survey, and detailed Radial Velocity measurements from ESO-Gaia, we analyse in detail a…
Disk-mediated accretion burst in a high-mass young stellar object
A. Caratti o Garatti, B. Stecklum, R. Garcia Lopez +13
Solar-mass stars form via circumstellar disk accretion (disk-mediated accretion). Recent findings indicate that this process is likely episodic in the form of accretion bursts, pos…
The ALMA view of W33A: A Spiral Filament Feeding the Candidate Disc in MM1-Main
L. T. Maud, M. G. Hoare, R. Galván-Madrid +4
We targeted the massive star forming region W33A using the Atacama Large Sub/Millimeter Array (ALMA) in band 6 (230 GHz) and 7 (345 GHz) to search for a sub-1000au disc around the…
VLTI-AMBER velocity-resolved aperture-synthesis imaging of Eta Carinae with a spectral resolution of 12000. Studies of the primary star wind and innermost wind-wind collision
G. Weigelt, K. -H. Hofmann, D. Schertl +26
Context. The mass loss from massive stars is not understood well. Eta Car is a unique object for studying the massive stellar wind during the LBV phase. It is also an eccentric bin…
Dissecting a SN impostor's circumstellar medium: MUSEing about the SHAPE of eta Car's outer ejecta
A. Mehner, W. Steffen, J. H. Groh +10
Aims. The structural inhomogeneities and kinematics of massive star nebulae are tracers of their mass-loss history. We conduct a three-dimensional morpho-kinematic analysis of the…
The LBV HR Car has a partner: Discovery of a companion with the VLTI
Henri M. J. Boffin, Thomas Rivinius, Antoine Merand +6
Luminous Blue Variables (LBVs) are massive stars caught in a post-main sequence phase, during which they are losing a significant amount of mass. As, on one hand, it is thought tha…
Star Formation at milli-arcsecond resolution
Rene Oudmaijer, Willem-Jan de Wit
This chapter discusses the use and possibilities of optical and infrared interferometry to study star formation. The chapter starts with a brief overview of the star formation proc…
A multi-wavelength interferometric study of the massive young stellar object IRAS 13481-6124
Paul A. Boley, Stefan Kraus, Willem-Jan de Wit +7
We present new mid-infrared interferometric observations of the massive young stellar object IRAS 13481-6124, using VLTI/MIDI for spectrally-resolved, long-baseline measurements (p…
VLT/MUSE discovers a jet from the evolved B[e] star MWC 137
A. Mehner, W. J. de Wit, J. H. Groh +6
Not all stars exhibiting the optical spectral characteristics of B[e] stars share the same evolutionary stage. The Galactic B[e] star MWC 137 is a prime example of an object with u…
High-resolution Br-gamma spectro-interferometry of the transitional Herbig Ae/Be star HD 100546: a Keplerian gaseous disc inside the inner rim
I. Mendigutía, W. J. de Wit, R. D. Oudmaijer +4
We present spatially and spectrally resolved Br-gamma emission around the planet-hosting, transitional Herbig Ae/Be star HD 100546. Aiming to gain insight into the physical origin…
The RCB star V854 Cen is surrounded by a hot dusty shell
Olivier Chesneau, Florentin Millour, Orsola De Marco +5
Aims : The hydrogen-deficient supergiants known as R Coronae Borealis (RCB) stars might be the result of a double-degenerate merger of two white dwarfs (WDs), or a final helium she…
Binarity of the LBV HR Car
Th. Rivinius, H. M. J. Boffin, W. J. de Wit +4
VLTI/AMBER and VLTI/PIONIER observations of the LBV HR Car show an interferometric signature that could not possibly be explained by an extended wind, more or less symmetrically di…
AMBER/VLTI Snapshot Survey on Circumstellar Environments
Th. Rivinius, W. J. de Wit, Z. Demers +2
OHANA is an interferometric snapshot survey of the gaseous circumstellar environments of hot stars, carried out by the VLTI group at the Paranal observatory. It aims to characteriz…
Dusty Blue Supergiants: News from High-Angular Resolution Observations
Willem-Jan de Wit, Rene Oudmaijer, Jorick Vink
An overview is presented of the recent advances in understanding the B[e] phenomenon among blue supergiant stars in light of high-angular resolution observations and with an emphas…
Near-Infrared Evidence for a Sudden Temperature Increase in Eta Carinae
Andrea Mehner, Kazunori Ishibashi, Patricia Whitelock +4
Aims. Eta Car's ultra-violet, optical, and X-ray light curves and its spectrum suggest a physical change in its stellar wind over the last decade. It was proposed that the mass-los…
An active asteroid belt causing the UX Ori phenomenon in RZ Psc
W. J. de Wit, V. P. Grinin, I. S. Potravnov +3
We report the discovery of mid-infrared excess emission in the young object RZ Psc. The excess constitutes ~8% of its Lbol, and is well fit by a single 500K black-body implying a d…
Neutral and ionized gas around the post-Red Supergiant IRC+10420 at au size scales
Rene Oudmaijer, Willem-Jan de Wit
IRC +10420 is one of the few known massive stars in rapid transition from the Red Supergiant phase to the Wolf-Rayet or Luminous Blue Variable phase. The star has an ionised wind a…
CO bandhead emission of massive young stellar objects: determining disc properties
J. D. Ilee, H. E. Wheelwright, R. D. Oudmaijer +7
Massive stars play an important role in many areas of astrophysics, but numerous details regarding their formation remain unclear. In this paper we present and analyse high resolut…
AMBER and CRIRES observations of the binary sgB[e] star HD 327083: evidence of a gaseous disc traced by CO bandhead emission
H. E. Wheelwright, W. J. de Wit, G. Weigelt +2
HD 327083 is a sgB[e] star that forms a binary system with an orbital semi-major axis of ~1.7 AU. Our previous observations using the VLTI and AMBER in the medium resolution K-band…