Supersoft X-Ray Source CAL 83: A Possible AE Aqr-like System
dc.contributor.author | Odendaal, A. | |
dc.contributor.author | Meintjes, P. J. | |
dc.contributor.author | Charles, P. A. | |
dc.contributor.author | Rajoelimanana, A. F. | |
dc.date.accessioned | 2023-01-18T14:25:23Z | |
dc.date.available | 2023-01-18T14:25:23Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Acta Polytechnica. 2015, vol. 2, no. 1, p. 94-98. | |
dc.identifier.issn | 1210-2709 (print) | |
dc.identifier.issn | 1805-2363 (online) | |
dc.identifier.uri | http://hdl.handle.net/10467/105761 | |
dc.description.abstract | CAL83 is a close binary supersoft X-ray source in the Large Magellanic Cloud. A ~67 s periodicity detected in supersoft X-rays is most probably associated with the spin period of a highly spun-up white dwarf (WD). The variability in the period is ascribed to the obscuration of the WD by the hydrogen burning envelope surrounding it, rotating with a period that is close to, but not quite synchronized with, the WD rotation period. Optical spectra obtained with SALT exhibit accretion disc emission lines with broad wing structures and P Cyg profiles, indicating mass outflows. Timing analysis of photometrical observations performed at the South African Astronomical Observatory (SAAO) revealed variable signals at ≤1 mHz which are thought to be associated with quasi-periodic oscillations from an accretion disc. The short spin period inferred for CAL83 can be the result of spin-up by accretion disc torques during a long mass transfer history, placing this source on a similar evolutionary track as the cataclysmic variable AE Aqr. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | |
dc.publisher | České vysoké učení technické v Praze | cs |
dc.publisher | Czech Technical University in Prague | en |
dc.relation.ispartofseries | Acta Polytechnica | |
dc.relation.uri | https://ojs.cvut.cz/ojs/index.php/APP/article/view/2844 | |
dc.rights | Creative Commons Attribution 4.0 International License | en |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.title | Supersoft X-Ray Source CAL 83: A Possible AE Aqr-like System | |
dc.type | article | en |
dc.date.updated | 2023-01-18T14:25:23Z | |
dc.identifier.doi | 10.14311/APP.2015.02.0094 | |
dc.rights.access | openAccess | |
dc.type.status | Peer-reviewed | |
dc.type.version | publishedVersion |
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