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The first Doppler images of the eclipsing binary SZ Piscium

Xiang, Yue; Gu, Shenghong; Cameron, A. Collier; Barnes, J. R. and Zhang, Liyun (2016). The first Doppler images of the eclipsing binary SZ Piscium. Monthly Notices of the Royal Astronomical Society, 456(1) pp. 314–322.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1093/mnras/stv2642
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Abstract

We present the first Doppler images of the active eclipsing binary system SZ Psc, based on the high-resolution spectral data sets obtained in 2004 November and 2006 September–December. The least-squares deconvolution technique was applied to derive high signal-to-noise profiles from the observed spectra of SZ Psc. Absorption features contributed by a third component of the system were detected in the LSD profiles at all observed phases. We estimated the mass and period of the third component to be about 0.9 M⊙ and 1283 ± 10 d, respectively. After removing the contribution of the third body from the least-squares deconvolved profiles, we derived the surface maps of SZ Psc. The resulting Doppler images indicate significant star-spot activities on the surface of the K subgiant component. The distributions of star-spots are more complex than that revealed by previous photometric studies. The cooler K component exhibited pronounced high-latitude spots as well as numerous low- and intermediate-latitude spot groups during the entire observing seasons, but did not show any large, stable polar cap, different from many other active RS CVn-type binaries.

Item Type: Journal Item
Copyright Holders: 2015 The Authors
ISSN: 1365-2966
Project Funding Details:
Funded Project NameProject IDFunding Body
Not Set10373023National Natural Science Foundation of China
Not Set10773027National Natural Science Foundation of China
Not Set11333006National Natural Science Foundation of China
Not SetU1431114National Natural Science Foundation of China
Not SetKJCX2-YW-T24Chinese Academy of Sciences
Keywords: stars: activity; binaries: eclipsing; stars: imaging; stars: individual: SZ Psc; starspots
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 46929
Depositing User: John Barnes
Date Deposited: 02 Aug 2016 14:28
Last Modified: 04 May 2019 00:03
URI: http://oro.open.ac.uk/id/eprint/46929
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