The kinematics and binary-induced shaping of PN HaTr 4

Details The kinematics and binary-induced shaping of PN HaTr 4 The kinematics and binary-induced shaping of PN HaTr 4

2011-09-14

arxiv.org/abs/1109.3098v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, to appear in proceedings of the IAU Symposium No. 283, Planetary Nebulae: An Eye to the Future

Scientific paper

We present the first detailed spatio-kinematical analysis of the planetary nebula HaTr 4, one of few known to contain a post-Common-Envelope central star system. Based on high spatial and spectral resolution spectroscopy of the [OIII]5004.84 angstrom nebular emission line, in combination with deep, narrow-band imagery, a spatio-kinematical model was developed in order to accurately determine the three-dimensional morphology and orientation of HaTr 4. The nebula is found to display an extended ovoid morphology with an equatorial enhancement consistent with a toroidal waist - a feature believed to be typical of central star binarity. The nebular inclination is found to be in good agreement with that determined for the binary plane, providing strong evidence that shaping and evolution of HaTr 4 has been influenced by its central binary system - making HaTr 4 one of only 5 planetary nebulae to have had this observationally proven.

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