ϵ Lupi: measuring the heartbeat of a doubly magnetic massive binary with BRITE Constellation
Abstract
ϵ 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 21, 2019
- Source ID
- 10.1093/mnras/stz1661
Entities
People
- A F J Moffat
- A Pigulski
- A Popowicz
- Coralie Neiner
- E Alecian
- Ernst Paunzen
- G A Wade
- G Handler
- H. Pablo
- J-b Le Bouquin
- J. Fuller
- K Zwintz
- M Shultz
- R Kuschnig
- Radoslaw Smolec
- S Mathis
- S Rucinski
- The Binamics Collaboration
- W Weiss
Organizations
- American Association of Variable Star Observers
- Austrian Research Promotion Agency
- CNES
- California Institute of Technology
- European Research Council
- Graz University of Technology
- Grenoble Alpes University
- Masaryk University
- National Aeronautics and Space Administration
- National Research Council
- Natural Sciences and Engineering Research Council
- Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences
- PSL Research University
- Paris Diderot University
- Paris-Saclay University
- Polish Academy of Sciences
- Silesian University of Technology
- United States Naval Observatory
- University of California
- University of Delaware
- University of Hawaiʻi System
- University of Innsbruck
- University of Michigan
- University of Toronto
- University of Vienna
- University of Wrocław
- Université de Montréal
- Uppsala University