Discovery of collimated bipolar outflows in the planetary nebula Th 2-A

A. Danehkar

doi:10.1088/0004-637X/815/1/35

Discovery of collimated bipolar outflows in the planetary nebula Th 2-A

A. Danehkar

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Abstract

We present a comprehensive set of spatially resolved, integral field spectroscopic mapping of the Wolf-Rayet planetary nebula Th 2-A, obtained using the Wide Field Spectrograph on the Australian National University 2.3-m telescope. Velocity-resolved Hα channel maps with a resolution of 20 km s⁻¹ allow us to identify different kinematic components within the nebula. This information is used to develop a three-dimensional morpho-kinematic model of the nebula using the interactive kinematic modeling tool SHAPE. These results suggest that Th 2-A has a thick toroidal shell with an expansion velocity of 40 ± 10 km s⁻¹, and a thin prolate ellipsoid with collimated bipolar outflows toward its axis reaching velocities in the range of 70-110 km s⁻¹, with respect to the central star. The relationship between its morpho-kinematic structure and peculiar [WO]-type stellar characteristics deserves further investigation.

Original language	English
Article number	35
Pages (from-to)	35-1-35-6
Number of pages	6
Journal	The Astrophysical Journal
Volume	815
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/815/1/35
Publication status	Published - 10 Dec 2015

Bibliographical note

Copyright 2015 The American Astronomical Society. First published in the Astrophysical journal, 815(1), 35, 2015. The original publication is available at http://www.doi.org/10.1088/0004-637X/815/1/35, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

ISM: jets and outflows
planetary nebulae: individual (Th 2-A)
stars: Wolf-Rayet

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10.1088/0004-637X/815/1/35

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title = "Discovery of collimated bipolar outflows in the planetary nebula Th 2-A",

abstract = "We present a comprehensive set of spatially resolved, integral field spectroscopic mapping of the Wolf-Rayet planetary nebula Th 2-A, obtained using the Wide Field Spectrograph on the Australian National University 2.3-m telescope. Velocity-resolved Hα channel maps with a resolution of 20 km s⁻¹ allow us to identify different kinematic components within the nebula. This information is used to develop a three-dimensional morpho-kinematic model of the nebula using the interactive kinematic modeling tool SHAPE. These results suggest that Th 2-A has a thick toroidal shell with an expansion velocity of 40 ± 10 km s⁻¹, and a thin prolate ellipsoid with collimated bipolar outflows toward its axis reaching velocities in the range of 70-110 km s⁻¹, with respect to the central star. The relationship between its morpho-kinematic structure and peculiar [WO]-type stellar characteristics deserves further investigation.",

keywords = "ISM: jets and outflows, planetary nebulae: individual (Th 2-A), stars: Wolf-Rayet",

author = "A. Danehkar",

note = "Copyright 2015 The American Astronomical Society. First published in the Astrophysical journal, 815(1), 35, 2015. The original publication is available at http://www.doi.org/10.1088/0004-637X/815/1/35, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2015",

month = dec,

day = "10",

doi = "10.1088/0004-637X/815/1/35",

language = "English",

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AU - Danehkar, A.

N1 - Copyright 2015 The American Astronomical Society. First published in the Astrophysical journal, 815(1), 35, 2015. The original publication is available at http://www.doi.org/10.1088/0004-637X/815/1/35, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2015/12/10

Y1 - 2015/12/10

N2 - We present a comprehensive set of spatially resolved, integral field spectroscopic mapping of the Wolf-Rayet planetary nebula Th 2-A, obtained using the Wide Field Spectrograph on the Australian National University 2.3-m telescope. Velocity-resolved Hα channel maps with a resolution of 20 km s⁻¹ allow us to identify different kinematic components within the nebula. This information is used to develop a three-dimensional morpho-kinematic model of the nebula using the interactive kinematic modeling tool SHAPE. These results suggest that Th 2-A has a thick toroidal shell with an expansion velocity of 40 ± 10 km s⁻¹, and a thin prolate ellipsoid with collimated bipolar outflows toward its axis reaching velocities in the range of 70-110 km s⁻¹, with respect to the central star. The relationship between its morpho-kinematic structure and peculiar [WO]-type stellar characteristics deserves further investigation.

AB - We present a comprehensive set of spatially resolved, integral field spectroscopic mapping of the Wolf-Rayet planetary nebula Th 2-A, obtained using the Wide Field Spectrograph on the Australian National University 2.3-m telescope. Velocity-resolved Hα channel maps with a resolution of 20 km s⁻¹ allow us to identify different kinematic components within the nebula. This information is used to develop a three-dimensional morpho-kinematic model of the nebula using the interactive kinematic modeling tool SHAPE. These results suggest that Th 2-A has a thick toroidal shell with an expansion velocity of 40 ± 10 km s⁻¹, and a thin prolate ellipsoid with collimated bipolar outflows toward its axis reaching velocities in the range of 70-110 km s⁻¹, with respect to the central star. The relationship between its morpho-kinematic structure and peculiar [WO]-type stellar characteristics deserves further investigation.

KW - ISM: jets and outflows

KW - planetary nebulae: individual (Th 2-A)

KW - stars: Wolf-Rayet

UR - https://www.scopus.com/pages/publications/84951335655

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DO - 10.1088/0004-637X/815/1/35

M3 - Article

SN - 0004-637X

VL - 815

SP - 35-1-35-6

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1

M1 - 35

ER -

Discovery of collimated bipolar outflows in the planetary nebula Th 2-A

Abstract

Bibliographical note

Keywords

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