Winds of planet hosting stars

Nicholson, B. A. and Mengel, M. W. and Brookshaw, L. and Vidotto, A. A. and Carter, B. D. and Marsden, S. C. and Soutter, J. and Waite, I. A. and Horner, J. (2015) Winds of planet hosting stars. In: 14th Australian Space Research Conference (ASRC 2014) , 29 Sept - 1 Oct 2014, Adelaide, Australia .

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Abstract

The field of exoplanetary science is one of the most rapidly growing areas of astrophysical research. As more planets are discovered around other stars, new techniques have been developed that have allowed astronomers to begin to characterise them. Two of the most important factors in understanding the evolution of these planets, and potentially determining whether they are habitable, are the behaviour of the winds of the host star and the way in which they interact with the planet. The purpose of this project is to reconstruct the magnetic fields of planet hosting stars from spectropolarimetric observations, and to use these magnetic field maps to inform simulations of the stellar winds in those systems using the Block Adaptive Tree Solar-wind Roe Upwind Scheme (BATS-R-US) code. The BATS-R- US code was originally written to investigate the behaviour of the Solar wind, and so has been altered to be used in the context of other stellar systems. These simulations will give information about the velocity, pressure and density of the wind outward from the host star. They will also allow us to determine what influence the winds will have on the space weather environment of the planet. This paper presents the preliminary results of these simulations for the star ��τ Boötis, using a newly reconstructed magnetic field map based on previously published observations. These simulations show interesting structures in the wind velocity around the star, consistent with the complex topology of its magnetic field.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: Copyright © 2015 National Space Society of Australia Ltd. No evidence of copyright restrictions preventing deposit of Accepted version.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 24 Jun 2016 03:43
Last Modified: 14 Aug 2017 00:23
Uncontrolled Keywords: stellar winds; stellar magnetic fields; stellar evolution; planetary evolution; habitability; astrobiology
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
URI: http://eprints.usq.edu.au/id/eprint/28537

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