Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus?
We report on high-resolution optical time-series spectroscopy of the central star of the `Eskimo' planetary nebula NGC~2392. Datasets were secured with the ESO 2.3m in 2006 March and CFHT 3.6m in 2010 March to diagnose the fast wind and photospheric properties of the central star. The HeI and H...
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ftdatacite:10.48550/arxiv.1403.1480 2023-05-15T16:06:33+02:00 Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus? Prinja, Raman Urbaneja, Miguel 2014 https://dx.doi.org/10.48550/arxiv.1403.1480 https://arxiv.org/abs/1403.1480 unknown arXiv https://dx.doi.org/10.1093/mnras/stu452 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences article-journal Article ScholarlyArticle Text 2014 ftdatacite https://doi.org/10.48550/arxiv.1403.1480 https://doi.org/10.1093/mnras/stu452 2022-04-01T13:00:11Z We report on high-resolution optical time-series spectroscopy of the central star of the `Eskimo' planetary nebula NGC~2392. Datasets were secured with the ESO 2.3m in 2006 March and CFHT 3.6m in 2010 March to diagnose the fast wind and photospheric properties of the central star. The HeI and HeII recombination lines reveal evidence for clumping and temporal structures in the fast wind that are erratically variable on timescales down to ~ 30 min. (i.e. comparable to the characteristic wind flow time). We highlight changes in the overall morphology of the wind lines that cannot plausibly be explained by line-synthesis model predictions with a spherically homogeneous wind. Additionally we present evidence that the UV line profile morphologies support the notion of a high-speed, high-ionization polar wind in NGC~2392. Analyses of deep-seated, near-photospheric absorption lines reveals evidence for low-amplitude radial velocity shifts. Fourier analysis points tentatively to a ~ 0.12-d modulation in the radial velocities, independently evident in the ESO and CFHT data. We conclude that the overall spectroscopic properties support the notion of a (high inclination) binary nucleus in NGC~2392 and an asymmetric fast wind. : MNRAS in press; 9 pages; 9 figures Text eskimo* DataCite Metadata Store (German National Library of Science and Technology) Parka ENVELOPE(17.540,17.540,66.787,66.787) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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language |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences Prinja, Raman Urbaneja, Miguel Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus? |
topic_facet |
Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
description |
We report on high-resolution optical time-series spectroscopy of the central star of the `Eskimo' planetary nebula NGC~2392. Datasets were secured with the ESO 2.3m in 2006 March and CFHT 3.6m in 2010 March to diagnose the fast wind and photospheric properties of the central star. The HeI and HeII recombination lines reveal evidence for clumping and temporal structures in the fast wind that are erratically variable on timescales down to ~ 30 min. (i.e. comparable to the characteristic wind flow time). We highlight changes in the overall morphology of the wind lines that cannot plausibly be explained by line-synthesis model predictions with a spherically homogeneous wind. Additionally we present evidence that the UV line profile morphologies support the notion of a high-speed, high-ionization polar wind in NGC~2392. Analyses of deep-seated, near-photospheric absorption lines reveals evidence for low-amplitude radial velocity shifts. Fourier analysis points tentatively to a ~ 0.12-d modulation in the radial velocities, independently evident in the ESO and CFHT data. We conclude that the overall spectroscopic properties support the notion of a (high inclination) binary nucleus in NGC~2392 and an asymmetric fast wind. : MNRAS in press; 9 pages; 9 figures |
format |
Text |
author |
Prinja, Raman Urbaneja, Miguel |
author_facet |
Prinja, Raman Urbaneja, Miguel |
author_sort |
Prinja, Raman |
title |
Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus? |
title_short |
Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus? |
title_full |
Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus? |
title_fullStr |
Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus? |
title_full_unstemmed |
Rummaging inside the Eskimo's parka: Variable asymmetric PN fast wind and a binary nucleus? |
title_sort |
rummaging inside the eskimo's parka: variable asymmetric pn fast wind and a binary nucleus? |
publisher |
arXiv |
publishDate |
2014 |
url |
https://dx.doi.org/10.48550/arxiv.1403.1480 https://arxiv.org/abs/1403.1480 |
long_lat |
ENVELOPE(17.540,17.540,66.787,66.787) |
geographic |
Parka |
geographic_facet |
Parka |
genre |
eskimo* |
genre_facet |
eskimo* |
op_relation |
https://dx.doi.org/10.1093/mnras/stu452 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1403.1480 https://doi.org/10.1093/mnras/stu452 |
_version_ |
1766402519783702528 |