High-Resolution Chandra X-Ray Imaging and Spectroscopy of the σ Orionis Cluster

@article{Skinner2008HighResolutionCX,
  title={High-Resolution Chandra X-Ray Imaging and Spectroscopy of the $\sigma$ Orionis Cluster},
  author={Stephen L. Skinner and Kimberly R. Sokal and David H Cohen and Marc Richard Gagne and Stanley P. Owocki and Richard D. Townsend},
  journal={The Astrophysical Journal},
  year={2008},
  volume={683},
  pages={796-812}
}
We present results of a 90 ks Chandra X-ray observation of the young ? Orionis cluster ( -->age ~ 3 Myr ) obtained with the HETGS. We use the high-resolution grating spectrum and moderate-resolution CCD spectrum of the massive central star ? Ori AB ( -->O 9.5 V + B 0.5 V ) to test wind shock theories of X-ray emission and also analyze the high spatial resolution zero-order ACIS-S image of the central cluster region. Chandra detected 42 X-ray sources on the primary CCD (ACIS-S3). All but five… 
HRC-I/Chandra X-ray observations towards σ Orionis
Aims. We investigated the X-ray emission from young stars and brown dwarfs in the σ Orionis cluster (τ ∼ 3M a,d ∼ 385 pc) and its relation to mass, the presence of circumstellar discs, and separation
X-RAY VARIABILITY OF σ ORIONIS YOUNG STARS AS OBSERVED WITH ROSAT
We used the Aladin Virtual Observatory tool and High Resolution Imager ROSAT archival data to search for X-ray variability in scale of days in 23 young stars in the sigma Orionis cluster and a
New deep XMM-Newton observations to the west of the σ Orionis cluster
Aims. The objective of this study is to determine the general X-ray properties of the young stars in the external regions of the σ Orionis cluster (τ ∼ 3M a,d ∼ 385 pc) and determine constraints on
X-rays from young star clusters: a complement to optical and infrared views
  • F. Damiani
  • Physics
    Proceedings of the International Astronomical Union
  • 2009
Abstract In the last few years, X-ray observational studies of young star clusters have advanced significantly, mainly thanks to the great capabilities of current X-ray observatories such as Chandra
XMM-Newton observations of the young open cluster around λ Orionis ,
Aims. We studied the X-ray properties of the young (∼1−8 Myr) open cluster around the hot (O8 III) star λ Ori and compared them with those of the similarly-aged σ Ori cluster to investigate possible
Detailed X-ray line properties of θ² Ori A in quiescence
We investigate X-ray emission properties of the peculiar X-ray source θ2 Ori A in the Orion Trapezium region using more than 500 ks of HETGS spectral data in the quiescent state. The amount of
CARINA OB STARS: X-RAY SIGNATURES OF WIND SHOCKS AND MAGNETIC FIELDS
The Chandra Carina Complex contains 200 known O- and B-type stars. The Chandra survey detected 68 of the 70 O stars and 61 of 127 known B0-B3 stars. We have assembled a publicly available
Stars and brown dwarfs in the σ Orionis cluster - III. OSIRIS/GTC low-resolution spectroscopy of variable sources
Context. Although many studies have been performed so far, there are still dozens of low-mass stars and brown dwarfs in the young sigma Orionis open cluster without detailed spectroscopic
Low-resolution spectroscopy and spectral energy distributions of selected sources towards σ Orionis
Aims. We study in detail nine sources in the direction of the young σ Orionis cluster, which is considered to be a unique site for studying stellar and substellar formation. The nine sources were
Smooth X-ray variability from Ophiuchi A+B. A strongly magnetized primary B2 star?
X-rays from massive stars are ubiquitous yet not clearly understood. In an XMM-Newton observation devoted to observe the first site of star formation in the Ophiuchi dark cloud, we detect smoothly
...
1
2
3
4
...

References

SHOWING 1-10 OF 107 REFERENCES
Chandra X-ray observations of the young stellar cluster NGC 6193 in the Ara OB1 association
A 90-ks Chandra High Energy Transmission Grating observation of the young stellar cluster NGC 6193 in the southern Ara OB1 association detected 43 X-ray sources in a 2 x 2 arcmin 2 core region
A near-infrared/optical/X-ray survey in the centre of σ Orionis
Because of the intense brightness of the OB-type multiple star system σ Ori, the low-mass stellar and substellar populations close to the centre of the very young σ Orionis cluster is poorly know. I
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. The
XMM-Newton observations of the σ Ori cluster - I. The complex RGS spectrum of the hot star σ Ori AB
We present XMM-Newton observations of the young (∼2−5 Myr) cluster around the hot (O9.5V) star σ Orionis AB, aimed at obtaining a high resolution RGS spectrum of the hot star as well as EPIC imaging
[ITAL]Chandra[/ITAL] Discovers a Very High Density X-Ray Plasma on the O Star ζ Orionis
We report on a Chandra line spectrum observation of the O supergiant ζ Orionis (O9.7 Ib). A 73.4 ks High-Energy Transmission Grating Spectrometer observation shows a wide range of ionization stages
Chandra spectroscopy of the hot star β Crucis and the discovery of a pre-main-sequence companion
In order to test the O star wind-shock scenario for X-ray production in less luminous stars with weaker winds, we made a pointed 74-ks observation of the nearby early B giant, β Crucis (β Cru; B0.5
X-Ray Emission from Early-Type Stars in the Orion Nebula Cluster
The X-ray properties of twenty ~1 Myr old O, B, and A stars of the Orion Trapezium are examined with data from the Chandra Orion Ultradeep Project (COUP). On the basis of simple theories for X-ray
Chandra Detection of Doppler-shifted X-Ray Line Profiles from the Wind of ζ Puppis (O4 f)
We report on a 67 ks High-Energy Transmission Grating observation of the optically brightest early O star z Puppis (O4 f). Many resolved X-ray lines are seen in the spectra over a wavelength range of
X-ray Line Emission from the Hot Stellar Wind of theta 1 Ori C
We present a first emission line analysis of a high resolution X-ray spectrum of the stellar wind of theta 1 Ori C obtained with the High Energy Transmission grating Spectrometer onboard the Chandra
XMM-Newton observations of the σ Orionis cluster: II. Spatial and spectral analysis of the full EPIC field
We present the results of an XMM- Newton observation of the young (${\sim} 2{-}4$ Myr) cluster around the hot star σ  Orionis. In a previous paper we presented the analysis of the RGS spectrum of the
...
1
2
3
4
5
...