Tracing the young massive high-eccentricity binary system Theta 1 Orionis C through periastron passage

  title={Tracing the young massive high-eccentricity binary system Theta 1 Orionis C through periastron passage},
  author={Stefan Kraus and Gerd Weigelt and Yu. Yu. Balega and Jos{\'e} A. Docobo and K. H. Hofmann and Thomas Preibisch and Dieter Schertl and Vakhtang S. Tamazian and Thomas Driebe and Keiichi Ohnaka and Romain G. Petrov and Markus Schoeller and M. A. Smith},
  journal={Astronomy and Astrophysics},
Context. The nearby high-mass star binary system θ 1 Ori C is the brightest and most massive of the Trapezium OB stars at the core of the Orion Nebula Cluster, and it represents a perfect laboratory to determine the fundamental parameters of young hot stars and to constrain the distance of the Orion Trapezium Cluster. Aims. By tracing the orbital motion of the θ 1 Ori C components, we aim to refine the dynamical orbit of this important binary system. Methods. Between January 2007 and March 2008… 
Θ 1 Orionis C - A triple system?
Context. As the brightest star in the Trapezium cluster, Θ 1 Ori C is the youngest and nearest to us among O-stars. It is considered to be a multiple system where the main component is an oblique
Multiple star systems in the Orion nebula
This work presents an interferometric study of the massive-binary fraction in the Orion Trapezium cluster with the recently comissioned GRAVITY instrument. We observed a total of 16 stars of mainly
The Orion Nebula Cluster (ONC) is the nearest region of massive star formation and thus a crucial testing ground for theoretical models. Of particular interest among the ONC's ∼1000 members are: θ1
GRAVITY Spectro-interferometric Study of the Massive Multiple Stellar System HD 93206 A
Characterization of the dynamics of massive star systems and the astrophysical properties of the interacting components are a prerequisite for understanding their formation and evolution. Optical
The binary star θ1 Ori C: orbital elements, evolutionary parameters and chemical composition
About 200 echelle spectra, obtained at the 1-m and 6-m telescopes of the Special Astrophysical Observatory (SAO) of the Russian Academy of Sciences (RAS), with high spectral resolution and
We present the full results of our three-year-long Submillimeter Array (SMA) survey of protoplanetary disks in the Orion Nebula Cluster. We imaged 23 fields at 880 μm and 2 fields at 1330 μm,
Young massive binary θ1 OriC: Radial velocities of components
We succeeded in separating the absorption lines of both the primary C1 and the secondary C2 component in the spectra of the young massive binary θ1 OriC (O6Vp + B0V, mass sum 44 ± 7M⊙), obtained
Resolving the stellar components of the massive multiple system Herschel 36 with AMBER/VLTI
Context. Massive stars are extremely important for the evolution of the galaxies; there are large gaps in our understanding of their properties and formation, however, mainly because they evolve
Resolved astrometric orbits of ten O-type binaries
Aims. 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 velocity
Disruption of the Orion molecular core 1 by wind from the massive star θ1 Orionis C
This finding demonstrates that the mechanical energy from the stellar wind is converted very efficiently into kinetic energy of the shell and causes more disruption of the Orion molecular core 1 than do photo-ionization and evaporation or future supernova explosions.


Visual/infrared interferometry of Orion Trapezium stars: preliminary dynamical orbit and aperture synthesis imaging of the θ1 Orionis C system
Context. Located in the Orion Trapezium cluster, θ^1 Ori C is one of the youngest and nearest high-mass stars (O5-O7) known. Besides its unique properties as a magnetic rotator, the system is also
The Becklin-Neugebauer Object as a Runaway B Star, Ejected 4000 Years Ago from the θ1 Orionis C System
We attempt to explain the properties of the Becklin-Neugebauer (BN) object as a runaway B star, as originally proposed by Plambeck et al. This is one of the best-studied bright infrared sources,
Long-term monitoring of theta1 OriC: the spectroscopic orbit and an improved rotational period
Context. The young O-type star θ 1 Ori C, the brightest star of the Trapezium cluster in Orion, is one of only two known magnetic rotators among the O stars. However, not all spectroscopic variations
Dynamical Decay of a Massive Multiple System in Orion KL
We present absolute astrometry of 35 radio sources in the Orion Trapezium and Becklin-Neugebauer/Kleinman-Low (BN/KL) regions, obtained from Very Large Array archival observations collected over a
A Parallactic Distance of 389 +24/-21 parsecs to the Orion Nebula Cluster from Very Long Baseline Array Observations
We determine the parallax and proper motion of the flaring, nonthermal radio star GMR A, a member of the Orion Nebula Cluster, using Very Long Baseline Array observations. Based on the parallax, we
Optical Interferometric Observations of θ1 Orionis C from NPOI and Implications for the System Orbit
With the Navy Prototype Optical Interferometer (NPOI), the binary system θ1 Orionis C, the most massive member of the Trapezium, was spatially resolved over a time period extending from 2006 February
The distance to the Orion Nebula cluster
The distance to the Orion Nebula cluster (ONC) is estimated using the rotational properties of its low-mass pre-main-sequence (PMS) stars. Rotation periods, projected equatorial velocities and
The Orion Nebula and Its Associated Population
▪ Abstract The Orion Nebula (M 42) is one of the best studied objects in the sky. The advent of multi-wavelength investigations and quantitative high resolution imaging has produced a rapid
Detailed spectroscopic analysis of the Trapezium cluster stars inside the Orion nebula. Rotational v
We present the results of a spectroscopic analysis of the Trapezium cluster stars inside the Orion Nebula. The rotational velocities have been obtained using Fourier analysis method, finding
Distance to Orion KL Measured with VERA
We present the initial results of multiepoch VLBI observations of 22 GHz H2O masers in the Orion KL region with VERA (VLBI Exploration of Radio Astrometry). With the VERA dual-beam receiving system,