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High-Resolution Spectroscopy of some Active Southern Stars

Published online by Cambridge University Press:  05 March 2013

Ian A. Waite ,
Brad D. Carter ,
Stephen C. Marsden  and
Matthew W. Mengel
Ian A. Waite*
Affiliation:
Centre for Astronomy, Solar Radiation and Climate (CASRAC), University of Southern Queensland, Toowoomba QLD 4350, Australia
Brad D. Carter
Affiliation:
Centre for Astronomy, Solar Radiation and Climate (CASRAC), University of Southern Queensland, Toowoomba QLD 4350, Australia
Stephen C. Marsden
Affiliation:
Centre for Astronomy, Solar Radiation and Climate (CASRAC), University of Southern Queensland, Toowoomba QLD 4350, Australia
Matthew W. Mengel
Affiliation:
Centre for Astronomy, Solar Radiation and Climate (CASRAC), University of Southern Queensland, Toowoomba QLD 4350, Australia
*
BCorresponding author. Email: [email protected]
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Abstract

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High-resolution échelle spectra of 42 nearby southern solar-type stars have been obtained, in a search for young, single, active, and rapidly rotating sun-like stars suitable for Doppler imaging and Zeeman Doppler imaging studies. As a result of this survey, 13 stars were determined to be youthful with ages less than 600 Myr (Hyades age) and eight of these were found to have projected rotational velocities in excess of 15 km s−1. In addition, five spectroscopic binary systems were identified. Of those stars observed for this survey, HD 106506 is the most outstanding target for mapping active regions. It is an apparently young and single star with rapid rotation (v sin i ∼ 80 km s−1), strong Hα chromospheric activity (log R′Hα ∼ −4.2), and deformation of the spectral line profiles indicating the presence of large starspots.

Keywords

stars: activitystars: spotsstars: magnetic fieldsstars: rotation
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 22 , Issue 1 , 2005 , pp. 29 - 35
Copyright
Copyright © Astronomical Society of Australia 2005

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