X-Ray Modeling of Very Young Early-Type Stars in the Orion Trapezium: Signatures of Magnetically Confined Plasmas and Evolutionary Implications

@article{Schulz2003XRayMO,
  title={X-Ray Modeling of Very Young Early-Type Stars in the Orion Trapezium: Signatures of Magnetically Confined Plasmas and Evolutionary Implications},
  author={Norbert S. Schulz and Claude R. Canizares and David P. Huenemoerder and K. Tibbetts},
  journal={The Astrophysical Journal},
  year={2003},
  volume={595},
  pages={365-383}
}
The Orion Trapezium is one of the youngest and closest star-forming regions within our Galaxy. With a dynamic age of ~3 × 105 yr, it harbors a number of very young hot stars, which likely are on the zero-age main sequence (ZAMS). We analyzed high-resolution X-ray spectra in the wavelength range of 1.5-25 A of three of its X-ray-brightest members (Θ1 Ori A, C, and E) obtained with the High Energy Transmission Grating Spectrometer (HETGS) on board the Chandra X-Ray Observatory. We measured X-ray… Expand
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References

SHOWING 1-10 OF 60 REFERENCES
Chandra X-Ray Observatory Study of the Orion Nebula Cluster and BN/KL Region
About 1000 X-ray emitting young pre–main-sequence (PMS) stars distributed in mass from ~0.05 M☉ brown dwarfs to a ~50 M☉ O star are detected in an image of the Orion Nebula obtained with the AdvancedExpand
X-Ray-emitting Young Stars in the Orion Nebula
The Orion Nebula Cluster and the molecular cloud in its vicinity have been observed with the ACIS-I detector on board the Chandra X-ray Observatory with 23 hr exposure in two observations. We detectExpand
HIGH RESOLUTION SPECTRA OF STELLAR WINDS IN VERY YOUNG MASSIVE STARS
We present a series of spectra from hot stars obtained with the high energy transmission grating spectrometer (HETGS) onboard the Chandra X-ray Observatory. Most of the selected stars are located atExpand
Search for optical coronal line emission from the X-ray sources Epsilon Orionis /B0 Ia/ and Kappa Orionis /B0.5 Ia/
High signal-to-noise observations have been made at the wavelengths of the lines of (Fe X) 6574 A and (Fe XIV) 5303 A to search for evidence of a coronal region at the base of the winds of epsilonExpand
X-ray spectra of Orion OB supergiants
The spectra are at a higher energy resolution than earlier X-ray observations of OB supergiants, and this allows stronger constraints to be placed on the location of the emission source in the outerExpand
High-Resolution Chandra Spectroscopy of τ Scorpii: A Narrow-Line X-Ray Spectrum from a Hot Star
Long known to be an unusual early-type star by virtue of its hard and strong X-ray emission, τ Scorpii poses a severe challenge to the standard picture of O-star wind-shock X-ray emission. TheExpand
ASCA X-Ray Spectroscopy of the Unusual B0 V Star τ Scorpii
We have obtained a high-quality ASCA spectrum of the MK standard B0 V star τ Sco in order to test the standard wind-shock picture of OB star X-ray production. The fluxes in three line complexes fromExpand
Deep ROSAT HRI Observations of the Orion Nebula
We present results from three deep ROSAT high-resolution imager observations of the Orion Nebula star-forming region. The X-ray images contain over 1500 cataloged stars in a roughly 0.8 sq deg regionExpand
High-Energy Processes in Young Stellar Objects
▪ Abstract Observational studies of low-mass stars during their early stages of evolution, from protostars through the zero-age main sequence, show highly elevated levels of magnetic activity. ThisExpand
Chandra Observations of Variable Embedded X-ray sources in Orion. Paper I: Resolving Orion Trapezium
We used the High Energy Transmission Grating Spectrometer (HETGS) onboard the Chandra X-ray Observatory to perform two observations, separated by three weeks, of the Orion Trapezium region. TheExpand
...
1
2
3
4
5
...