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

A. Danehkar

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    11 Citations (Scopus)
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    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 languageEnglish
    Article number35
    Pages (from-to)35-1-35-6
    Number of pages6
    JournalAstrophysical Journal
    Issue number1
    Publication statusPublished - 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, 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.


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


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