XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows?
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 o...
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ftcern:oai:cds.cern.ch:812323 2023-05-15T16:07:30+02:00 XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows? Guerrero, M A Chu, Y H Gruendl, R A Meixner, M 2004-12-20 http://cds.cern.ch/record/812323 eng eng http://cds.cern.ch/record/812323 astro-ph/0412540 oai:cds.cern.ch:812323 Astrophysics and Astronomy 2004 ftcern 2018-07-28T07:06:56Z 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. Other/Unknown Material eskimo* CERN Document Server (CDS) |
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Astrophysics and Astronomy |
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Astrophysics and Astronomy Guerrero, M A Chu, Y H Gruendl, R A Meixner, M XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows? |
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Astrophysics and Astronomy |
description |
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. |
author |
Guerrero, M A Chu, Y H Gruendl, R A Meixner, M |
author_facet |
Guerrero, M A Chu, Y H Gruendl, R A Meixner, M |
author_sort |
Guerrero, M A |
title |
XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows? |
title_short |
XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows? |
title_full |
XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows? |
title_fullStr |
XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows? |
title_full_unstemmed |
XMM-Newton Detection of Hot Gas in the Eskimo Nebula: Shocked Stellar Wind or Collimated Outflows? |
title_sort |
xmm-newton detection of hot gas in the eskimo nebula: shocked stellar wind or collimated outflows? |
publishDate |
2004 |
url |
http://cds.cern.ch/record/812323 |
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eskimo* |
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eskimo* |
op_relation |
http://cds.cern.ch/record/812323 astro-ph/0412540 oai:cds.cern.ch:812323 |
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1766403609491144704 |