Suzaku and XMM-Newton observations of diffuse X-ray emission from the eastern tip region of the Carina Nebula

Yuichiro Ezoe, Kenji Hamaguchi, Robert A. Gruendl, You Hua Chu, Robert Petre, Michael F. Corcoran

Research output: Contribution to journalArticle

Abstract

The eastern tip region of the Carina Nebula was observed with the Suzaku XIS for 77 ks to conduct a high-precision spectral study of extended X-ray emission. XMM-Newton EPIC data of this region were also utilized to detect point sources. The XIS detected strong extended X-ray emission from the entire field-of-view with a 0.2-5 keV flux of 0.7-4 × lO -14erg s -1 arcmin -2. The emission has a blob-like structure that coincides with an ionized gas filament observed in mid-infrared images. Contributions of astrophysical backgrounds and the detected point sources were insignificant. Thus the emission is diffuse in nature. The X-ray spectrum of the diffuse emission was represented by a two-temperature plasma model with temperatures of 0.3 and 0.6 keV and an absorption column density of 2 × 1021 cm -1. The X-ray emission showed normal nitrogen-to-oxygen abundance ratios and a high iron-to-oxygen abundance ratio. The spectrally deduced parameters, such as temperatures and column densities, are common to the diffuse X-ray emission near η Car. Thus, the diffuse X-ray emission in these two fields may have the same origin. The spectral fitting results are discussed to constrain the origin in the context of stellar winds and supernovae.

Original languageEnglish (US)
Pages (from-to)S123-S136
JournalPublications of the Astronomical Society of Japan
Volume61
Issue numberSUPPL. 1
StatePublished - May 5 2009

Keywords

  • ISM: abundances
  • ISM: individual (Carina Nebula)
  • Stars: winds
  • Supernovae: general
  • X-rays: ISM

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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