Discovery of Magnetospheric Interactions in the Doubly-Magnetic Hot Binary Lupi
arXiv:2306.05995 · doi:10.1093/mnras/stad1756
Abstract
Magnetic fields are extremely rare in close, hot binaries, with only 1.5\% of such systems known to contain a magnetic star. The eccentric Lupi system stands out in this population as the only close binary in which both stars are known to be magnetic. We report the discovery of strong, variable radio emission from Lupi using the upgraded Giant Metrewave Radio Telescope (uGMRT) and the MeerKAT radio telescope.The light curve exhibits striking, unique characteristics including sharp, high-amplitude pulses that repeat with the orbital period, with the brightest enhancement occurring near periastron. The characteristics of the light curve point to variable levels of magnetic reconnection throughout the orbital cycle, making Lupi the first known high-mass, main sequence binary embedded in an interacting magnetosphere. We also present a previously unreported enhancement in the X-ray light curve obtained from archival XMM-Newton data. The stability of the components' fossil magnetic fields, the firm characterization of their relatively simple configurations, and the short orbital period of the system make Lupi an ideal target to study the physics of magnetospheric interactions. This system may thus help us to illuminate the exotic plasma physics of other magnetically interacting systems such as moon-planet, planet-star, and star-star systems including T Tauri binaries, RS CVn systems, and neutron star binaries.
arXiv commentAccepted for publication in MNRAS, 16 pages, 12 figures
References in corpus (47)
- Observation of Gravitational Waves from a Binary Black Hole Merger
- GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
- Binary interaction dominates the evolution of massive stars
- Mass-loss predictions for O and B stars as a function of metallicity
- A multi-scale multi-frequency deconvolution algorithm for synthesis imaging in radio interferometry
- Dynamical Simulations of Magnetically Channeled Line-Driven Stellar Winds: I. Isothermal, Nonrotating, Radially Driven Flow
- A Magnetic Confinement vs. Rotation Classification of Massive-Star Magnetospheres
- The MiMeS survey of magnetism in massive stars: Magnetic analysis of the O-type stars
- BRITE-Constellation: nanosatellites for precision photometry of bright stars
- Non-thermal emission processes in massive binaries
- Radio emission models of Colliding-Wind Binary Systems
- Magnetic massive stars as progenitors of "heavy" stellar-mass black holes
- The Magnetic Early B-type Stars III: A main sequence magnetic, rotational, and magnetospheric biography
- X-ray emission from magnetic massive stars
- A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties
- X-rays from Magnetically Confined Wind Shocks: Effect of Cooling-Regulated Shock Retreat
- The effects of surface fossil magnetic fields on massive star evolution: I. Magnetic field evolution, mass-loss quenching and magnetic braking
- Auroral Radio Emission from Stars: the case of CU Virginis
- MOBSTER -- VI. The crucial influence of rotation on the radio magnetospheres of hot stars
- Synchrotron emission from the T Tauri binary system V773 Tau A
- The effects of surface fossil magnetic fields on massive star evolution: II. Implementation of magnetic braking in MESA and implications for the evolution of surface rotation in OB stars
- Pre-merger electromagnetic counterparts of binary compact stars
- The Magnetic Early B-type Stars IV: Breakout or Leakage? H emission as a diagnostic of plasma transport in centrifugal magnetospheres
- Recurring millimeter flares as evidence for star-star magnetic reconnection events in the DQ Tauri PMS binary system
- A scaling relationship for non-thermal radio emission from ordered magnetospheres: from the top of the Main Sequence to planets
- Accretion and Magnetic Reconnection in the Classical T Tauri Binary DQ Tau
- Detection of magnetic fields in both B-type components of the Lupi system: a new constraint on the origin of fossil fields?
- 3D-modelling of the stellar auroral radio emission
- Centrifugal breakout reconnection as the electron acceleration mechanism powering the radio magnetospheres of early-type stars
- HD 156324: a tidally locked magnetic triple spectroscopic binary with a disrupted magnetosphere
- The BinaMIcS project: understanding the origin of magnetic fields in massive stars through close binary systems
- Comparative analysis of two formation scenarios of bursty radio emission from ultracool dwarfs
- First detections of 610 MHz radio emission from hot magnetic stars
- The orbit of the close spectroscopic binary epsilon Lupi and the intrinsic variability of its early B-type components
- The magnetic characteristics of Galactic OB stars from the MiMeS survey of magnetism in massive stars
- Lupi: measuring the heartbeat of a doubly-magnetic massive binary with BRITE-Constellation
- Swift and XMM-Newton observations of an RS CVn type eclipsing binary SZ Psc: Superflare and coronal properties
- An infrared diagnostic for magnetism in hot stars
- Magnetic topology in coupled binaries, spin-orbital resonances, and flares
- Ultraviolet Line Profiles of Slowly Rotating Massive Star Winds Using the "Analytic Dynamical Magnetosphere" Formalism
- Magnetic Interactions in Pre-Main-Sequence Binaries
- Testing a scaling relation between coherent radio emission and physical parameters of hot magnetic stars
- MOBSTER -- V: Discovery of a magnetic companion star to the magnetic Cep pulsator HD 156424
- What leads to premature upper cut-off frequencies of auroral radio emission from hot magnetic stars?
- Magnetic properties of three cool CP stars with strong fields
- Discovery of extraordinary X-ray emission from magnetospheric interaction in the unique binary stellar system Lupi
- The magnetosphere of the close accreting PMS binary V4046 Sgr AB