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Direct evidence of a full dipole flip during the magnetic cycle of a sun-like star
S. Boro Saikia, T. Lueftinger, S. V Jeffers +9
The behaviour of the large-scale dipolar field, during a star's magnetic cycle, can provide valuable insight into the stellar dynamo and associated magnetic field manifestations su…
Observing the simulations: Applying ZDI to 3D non-potential magnetic field simulations
L. T. Lehmann, G. A. J. Hussain, M. M. Jardine +2
The large-scale magnetic fields of stars can be obtained with the Zeeman-Doppler-Imaging (ZDI) technique, but their interpretation is still challenging as the contribution of the s…
The Rotationally Modulated Polarization of Boo A
Daniel V. Cotton, Dag Evensberget, Stephen C. Marsden +9
We have observed the active star Boo A (HD 131156A) with high precision broadband linear polarimetry contemporaneously with circular spectropolarimetry. We find both signals ar…
The Solar Wind in Time II: 3D stellar wind structure and radio emission
D. Ó Fionnagáin, A. A. Vidotto, P. Petit +5
In this work, we simulate the evolution of the solar wind along its main sequence lifetime and compute its thermal radio emission. To study the evolution of the solar wind, we use…
Characterisation of the HD 219134 multi-planet system I. Observations of stellar magnetism, wind, and high-energy flux
C. P. Folsom, L. Fossati, B. E. Wood +9
HD 219134 hosts several planets, with seven candidates reported, and the two shortest period planets are rocky (4-5 ) and transit the star. Here we present contemporane…
Characterisation of the HD219134 multi-planet system II. Stellar-wind sputtered exospheres in rocky planets b & c
A. A. Vidotto, H. Lichtenegger, L. Fossati +6
We present a 3D study of the formation of refractory-rich exospheres around the rocky planets HD219134b and c. These exospheres are formed by surface particles that have been sputt…