| DOI | Resolve DOI: https://doi.org/10.1007/s12036-020-09641-y |
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| Author | Search for: Alton, Kevin B.ORCID identifier: https://orcid.org/0000-0002-2861-4800; Search for: Nelson, Robert H.1; Search for: Stȩpień, Kazimierz |
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| Affiliation | - National Research Council of Canada. Herzberg Astronomy and Astrophysics
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| Format | Text, Article |
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| Subject | CCD photometry; Roche modeling; radial velocity spectroscopy; period analysis; light-time effect; Applegate mechanism; Wilson–Devinney cod |
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| Abstract | Precise multi-color CCD-derived photometric data were obtained from EH Cnc at two sites during 2010, 2014 and 2018 wherein each epoch used a different instrument. This has provided a unique opportunity to investigate parameter uncertainty following Roche modeling of light curves optimized by differential corrections using the Wilson–Devinney code. Furthermore, new radial velocity data from EH Cnc presented in this study for the first time has produced absolute physical and geometric parameters for this A-subtype W UMa-type variable. Analysis of eclipse timing data confirms the presence of sinusoidal-like excursions in the eclipse timing residuals. We address whether these are due to magnetic activity cycles, the so-called “Applegate effect”, or related to a light-time effect (LiTE) resulting from the presence of a third gravitationally bound cool low mass white dwarf. A model using the PAdova & TRieste Stellar Evolution Code (PARSEC) has provided valuable insight about the evolutionary history of EH Cnc as a trinary system. |
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| Publication date | 2020-10-21 |
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| Publisher | Springer |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 498f8e67-6c24-4d8b-8fba-e1e8d962f12e |
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| Record created | 2021-12-02 |
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| Record modified | 2023-07-14 |
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