MOBSTER – VI. The crucial influence of rotation on the radio magnetospheres of hot stars

• DOI: 10.1093/mnras/stac136
• Publication Date: 2022-02-04T20:12:29Z
• Authors: M E Shultz; S P Owocki; A ud-Doula; A Biswas; D Bohlender; P Chandra; B Das; A David-Uraz; V Khalack; O Kochukhov; J D Landstreet; P Leto; D Monin; C Neiner; Th Rivinius; G A Wade
• Keywords: Rotation period; Flare star

ABSTRACT Numerous magnetic hot stars exhibit gyrosynchrotron radio emission. The source electrons were previously thought to be accelerated relativistic velocities in the current sheet formed middle magnetosphere by wind opening field lines. However, a lack of dependence luminosity on power, and strong rotation, has recently challenged this paradigm. We have collected all measurements early-type available literature. When constraints and/or rotational period are not available, we determined these using unpublished spectropolarimetric photometric data. result is largest sample with observations that yet been analysed: 131 constraints, which 50 radio-bright. confirm an obvious radiation furthermore find accounting for rotation neatly separates without detected There close correlation between H α emission strength luminosity. These factors suggest may explained same mechanism responsible from centrifugal magnetospheres, i.e. breakout (CBO), however, while α-emitting probes cool plasma before breakout, consequence centrifugally driven reconnection.