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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
LUPI: Measuring the heartbeat of a doubly magnetic massive binary with BRITE constellation
Monthly Notices of the Royal Astronomical Society, No. 1, Year 2019
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Description
Lupi A is a binary system consisting of two main-sequence early B-type stars Aa and Ab in a short period, moderately eccentric orbit. The close binary pair is the only doubly magnetic massive binary currently known. Using photometric data from the BRITE Constellation we identify a modest heartbeat variation. Combining the photometry with radial velocities of both components we determine a full orbital solution including empirical masses and radii. These results are compared with stellar evolution models as well as interferometry and the differences discussed. We also find additional photometric variability at several frequencies, finding it unlikely these frequencies can be caused by tidally excited oscillations. We do, however, determine that these signals are consistent with gravity mode pulsations typical for slowly pulsating B stars. Finally we discuss how the evolution of this system will be affected by magnetism, determining that tidal interactions will still be dominant. © 2019 The Author(s).
Authors & Co-Authors
Pablo, Herbert
United States, Cambridge
American Association of Variable Star Observers
Shultz, Matthew E.
United States, Newark
University of Delaware
Sweden, Uppsala
Uppsala Universitet
Fuller, Jim
United States, Pasadena
California Institute of Technology
United States, Santa Barbara
University of California, Santa Barbara
Wade, Gregg A.
Canada, Kingston
Royal Military College of Canada
Paunzen, Ernst
Czech Republic, Brno
Masaryk University
Mathis, Stéphane
France, Gif-sur-yvette
Commissariat a L'energie Atomique et Aux Energies Alternatives
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
France, Paris
Sorbonne Université
Le Bouquin, Jean Baptiste
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
United States, Ann Arbor
University of Michigan, Ann Arbor
Pigulski, Andrzej
Poland, Wroclaw
University of Wroclaw
Handler, Gerald
Poland, Warszawa
Polish Academy of Sciences
Alécian, Evelyne
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
Kuschnig, Rainer
Austria, Graz
Technische Universitat Graz
Moffat, Anthony F.J.
Canada, Montreal
University of Montreal
Neiner, Coralie
France, Paris
Sorbonne Université
Popowicz, Adam
Poland, Gliwice
Silesian University of Technology
Ruciński, Slavek M.
Canada, Toronto
University of Toronto
Smolec, Radoslaw
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Weiss, Werner W.
Austria, Vienna
Universität Wien
Zwintz, Konstanze
Austria, Innsbruck
Universität Innsbruck
Statistics
Citations: 18
Authors: 18
Affiliations: 21
Identifiers
Doi:
10.1093/mnras/stz1661
ISSN:
00358711