Suzaku Observation of Diffuse X-ray Emission from the Carina Nebula

Abstract

We studied extended X-ray emission from the Carina Nebula taken with the Suzaku CCD camera XIS on 2005 Aug. 29. The X-ray morphology, plasma temperature and absorption to the plasma are consistent with the earlier Einstein results. The Suzaku spectra newly revealed emission lines from various species including oxygen, but not from nitrogen. This result restricts the N/O ratio significantly low, compared with evolved massive stellar winds, suggesting that the diffuse emission is originated in an old supernova remnant or a super shell produced by multiple supernova remnants. The X-ray spectra from the north and south of Eta Carinae showed distinct differences between 0.3-2 keV. The south spectrum shows strong L-shell lines of iron ions and K-shell lines of silicon ions, while the north spectrum shows them weak in intensity. This means that silicon and iron abundances are a factor of 2-4 higher in the south region than in the north region. The abundance variation may be produced by an SNR ejecta, or relate to the dust formation around the star forming core.

12 pages, 6 figures, accepted to PASJ

References in corpus (20)

• Interstellar Dust Grains
• An Overview of the Performance and Scientific Results from the Chandra X-Ray Observatory (CXO)
• Hard X-ray Detector (HXD) on Board Suzaku
• A high spatial resolution X-ray and H-alpha study of hot gas in the halos of star-forming disk galaxies. I. Spatial and spectral properties of the diffuse X-ray emission
• X-ray photoionized plasma diagnostics with Helium-like ions. Application to Warm Absorber-Emitter in Active Galactic Nuclei
• In-Orbit Performance of the Hard X-ray Detector on board Suzaku
• The Parkes multibeam pulsar survey: III. Young pulsars & the discovery and timing of 200 pulsars
• Global X-ray properties of the Orion Nebula region
• Ten Million Degree Gas in M 17 and the Rosette Nebula: X-ray Flows in Galactic H II Regions
• The Evolution of Supernovae in Circumstellar Wind-Blown Bubbles I. Introduction and One-Dimensional Calculations
• Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission
• A Stellar Wind Bubble Coincident with the Anomalous X-ray Pulsar 1E 1048.1-5937: Are Magnetars Formed From Massive Progenitors?
• Chandra Deep X-ray Observation of a Typical Galactic Plane Region and Near-Infrared Identification
• High-Mass Cloud Cores in the eta Carinae Giant Molecular Cloud
• Anomalous X-ray Pulsar 1E 1048.1-5937: Pulsed Flux Flares and Large Torque Variations
• Investigation of Diffuse Hard X-ray Emission from the Massive Star-Forming Region NGC 6334
• Chandra Observations of Associates of $\eta$ Car: I. Luminosities
• Spatially Resolved X-ray Spectroscopy of Vela Shrapnel A
• Chandra Observations of Associates of $\eta$ Car: II. Spectra
• X-ray spectroscopy of Eta Carinae with XMM-Newton

Cited by in corpus (21)

• An Introduction to the Chandra Carina Complex Project
• One Dimensional Dynamical Models of the Carina Nebula Bubble
• Is the PAMELA anomaly caused by the supernova explosions near the Earth?
• X-ray Spectral Variation of Eta Carinae through the 2003 X-ray Minimum
• The Chandra Carina Complex Project: Deciphering the Enigma of Carina's Diffuse X-ray Emission
• Suzaku Observations of the North Polar Spur: Evidence for Nitrogen Enhancement
• Origin of the Proton-to-Helium Ratio Anomaly in Cosmic Rays
• A Smoking Gun in the Carina Nebula
• HESS J1616-508: likely powered by PSR J1617-5055
• A Survey of Irradiated Pillars, Globules, and Jets in the Carina Nebul
• Enhancement of Terrestrial Diffuse X-ray Emission Associated With Coronal Mass Ejection and Geomagnetic Storm
• Suzaku Spectroscopy of the Extended X-Ray Emission in M17
• Young energetic PSR J1617-5055, its underluminous nebula and unidentified TeV source HESS J1616-508
• H.E.S.S. observations of the Carina nebula and its enigmatic colliding wind binary Eta Carinae
• Investigation of the stellar content in the western part of the Carina nebula
• Super-hard X-Ray Emission from eta Carinae Observed with Suzaku
• Suzaku Observation of the Diffuse X-Ray Emission from the Open Cluster Westerlund 2: a Hypernova Remnant?
• Suzaku Monitoring of Hard X-ray Emission from Eta Carinae over a Single Binary Orbital Cycle
• The peculiar isolated neutron star in the Carina Nebula - Deep XMM-Newton and ESO-VLT observations of 2XMM J104608.7-594306
• Dissecting a SN impostor's circumstellar medium: MUSEing about the SHAPE of eta Car's outer ejecta
• Suzaku Observation of Diffuse X-Ray Emission from a Southwest Region of the Carina Nebula