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

A. Danehkar

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    9 Citations (Scopus)
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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 languageEnglish
    Article number35
    Pages (from-to)35-1-35-6
    Number of pages6
    JournalAstrophysical Journal
    Volume815
    Issue number1
    DOIs
    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 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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