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Xiang, Yue; Gu, Shenghong; Cameron, A. Collier; Barnes, J. R. and Zhang, Liyun
(2016).
DOI: https://doi.org/10.1093/mnras/stv2642
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.
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About
- Item ORO ID
- 46929
- Item Type
- Journal Item
- ISSN
- 1365-2966
- Project Funding Details
-
Funded Project Name Project ID Funding Body Not Set 10373023 National Natural Science Foundation of China Not Set 10773027 National Natural Science Foundation of China Not Set 11333006 National Natural Science Foundation of China Not Set U1431114 National Natural Science Foundation of China Not Set KJCX2-YW-T24 Chinese Academy of Sciences - Keywords
- stars: activity; binaries: eclipsing; stars: imaging; stars: individual: SZ Psc; starspots
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2015 The Authors
- Depositing User
- John Barnes