XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows?

Abstract

The Eskimo Nebula (NGC 2392) is a double-shell planetary nebula (PN) known for the exceptionally large expansion velocity of its inner shell, ~90 km/s, and the existence of a fast bipolar outflow with a line-of-sight expansion velocity approaching 200 km/s. We have obtained XMM-Newton observations of the Eskimo and detected diffuse X-ray emission within its inner shell. The X-ray spectra suggest thin plasma emission with a temperature of ~2x10^6 K and an X-ray luminosity of L_X = (2.6+/-1.0)x10^31 (d/1150 pc)^2 ergs/s, where d is the distance in parsecs. The diffuse X-ray emission shows noticeably different spatial distributions between the 0.2-0.65 keV and 0.65-2.0 keV bands. High-resolution X-ray images of the Eskimo are needed to determine whether its diffuse X-ray emission originates from shocked fast wind or bipolar outflows.

arXiv comment4 pages, 2 figures, accepted in Astronomy and Astrophysics Letters

References in corpus (14)

• Investigating the Near-Infrared Properties of Planetary Nebula II. Medium Resolution Spectra
• Chandra Reveals the X-ray Glint in the Cat's Eye
• Discovery of Extended X-ray Emission from the Planetary Nebula NGC 7027 by the Chandra X-ray Observatory
• Chandra X-ray Observatory Detection of Extended X-ray Emission from the Planetary Nebula BD+303639
• The Enigmatic X-ray Point Sources at the Central Stars of NGC 6543 and NGC 7293
• A Compact X-ray Source and Possible X-ray Jets within the Planetary Nebula Menzel 3
• A New Look At Carbon Abundances In Planetary Nebulae. IV. Implications For Stellar Nucleosynthesis
• ROSAT observations of X-ray emission from planetary nebulae
• Diffuse X-ray emission from the planetary nebula NGC 7009
• On the Luminosities and Temperatures of Extended X-ray Emission from Planetary Nebulae
• HE 3-1475 AND ITS JETS
• X-Ray Emission from the Pre-Planetary Nebula Henize 3-1475
• On the Asymmetries of Extended X-ray Emission from Planetary Nebulae
• Abundance Anomalies in the X-ray Spectra of the Planetary Nebulae NGC 7027 and BD +30 363

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