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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ftdatacite:10.48550/arxiv.astro-ph/0412540 2023-05-15T16:07:18+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 https://dx.doi.org/10.48550/arxiv.astro-ph/0412540 https://arxiv.org/abs/astro-ph/0412540 unknown arXiv https://dx.doi.org/10.1051/0004-6361:200400131 Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Astrophysics astro-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2004 ftdatacite https://doi.org/10.48550/arxiv.astro-ph/0412540 https://doi.org/10.1051/0004-6361:200400131 2022-04-01T16:21:00Z 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. : 4 pages, 2 figures, accepted in Astronomy and Astrophysics Letters Text eskimo* DataCite Metadata Store (German National Library of Science and Technology) |
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Astrophysics astro-ph FOS Physical sciences |
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Astrophysics astro-ph FOS Physical sciences 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? |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
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. : 4 pages, 2 figures, accepted in Astronomy and Astrophysics Letters |
format |
Text |
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? |
publisher |
arXiv |
publishDate |
2004 |
url |
https://dx.doi.org/10.48550/arxiv.astro-ph/0412540 https://arxiv.org/abs/astro-ph/0412540 |
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eskimo* |
genre_facet |
eskimo* |
op_relation |
https://dx.doi.org/10.1051/0004-6361:200400131 |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.astro-ph/0412540 https://doi.org/10.1051/0004-6361:200400131 |
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1766403362658451456 |