252 citations · 1.2k across the 31 of their papers we have counts for
23 papers · 1 filter
Spectropolarimetric characterisation of exoplanet host stars in preparation of the mission II. The magnetised wind environment of TOI-1860, DS Tuc A, and HD 63433
S. Bellotti, A. Lavail, D. Evensberget +10
We update the status of the spectropolarimetric campaign dedicated to characterise the magnetic field properties of a sample of known exoplanet-hosting stars included in the curren…
The magnetic and spin-down properties of slowly rotating fully convective M dwarfs
Victor See, Louis Amard, Stefano Bellotti +19
The evolution of the magnetism, winds and rotation of low-mass stars are all linked. One of the most common ways to probe the magnetic properties of low-mass stars is with the Zeem…
Evolving magnetic lives of Sun-like stars. I. Characterisation of the large-scale magnetic field with Zeeman-Doppler imaging
S. Bellotti, T. Lueftinger, S. Boro Saikia +6
Planets orbiting young, solar-type stars are embedded in a more energetic environment than that of the solar neighbourhood. They experience harsher conditions due to enhanced stell…
X-ray detection of astrospheres around three main-sequence stars and their mass-loss rates
K. G. Kislyakova, M. Güdel, D. Koutroumpa +3
Stellar winds of cool main sequence stars are very difficult to constrain observationally. One way to measure stellar mass loss rates is to detect soft X-ray emission from stellar…
Non-thermal motions and atmospheric heating of cool stars
S. Boro Saikia, T. Lueftinger, V. S. Airapetian +6
The magnetic processes associated with the non-thermal broadening of optically thin emission lines appear to carry enough energy to heat the corona and accelerate the solar wind. W…
NIRwave: A wave-turbulence-driven solar wind model constrained by PSP observations
Simon Schleich, Sudeshna Boro Saikia, Udo Ziegler +2
We generate a model description of the solar wind based on an explicit wave-turbulence-driven heating mechanism, and constrain our model with observational data. We included an exp…
Absolute Ca II H & K and H-alpha flux measurements of low-mass stars: Extending to M dwarfs
C. J. Marvin, A. Reiners, G. Anglada-Escudé +2
Context: With the recent surge of planetary surveys focusing on detecting Earth-mass planets around M dwarfs, it is becoming more important to understand chromospheric activity in…
Linking chromospheric activity and magnetic field properties for late-type dwarf stars
E. L. Brown, S. V. Jeffers, S. C. Marsden +9
Spectropolarimetric data allow for simultaneous monitoring of stellar chromospheric activity and the surface-averaged longitudinal magnetic field, $B_l…
Deep-SWIM: A few-shot learning approach to classify Solar WInd Magnetic field structures
Hala Lamdouar, Sairam Sundaresan, Anna Jungbluth +9
The solar wind consists of charged particles ejected from the Sun into interplanetary space and towards Earth. Understanding the magnetic field of the solar wind is crucial for pre…
The crucial role of surface magnetic fields for stellar dynamos: Epsilon Eridani, 61 Cygni A, and the Sun
S. V. Jeffers, R. H. Cameron, S. C. Marsden +9
Cool main-sequence stars, such as the Sun, have magnetic fields which are generated by an internal dynamo mechanism. In the Sun, the dynamo mechanism produces a balance between the…
Time evolution of magnetic activity cycles in young suns: The curious case of kappa Ceti
S. Boro Saikia, T. Lueftinger, C. P. Folsom +15
A detailed investigation of the magnetic properties of young Sun-like stars can provide valuable information on our Sun's magnetic past and its impact on the early Earth. We determ…
Do non-dipolar magnetic fields contribute to spin-down torques?
Victor See, Sean P. Matt, Adam J. Finley +14
Main sequence low-mass stars are known to spin-down as a consequence of their magnetised stellar winds. However, estimating the precise rate of this spin-down is an open problem. T…
Estimating magnetic filling factors from Zeeman-Doppler magnetograms
Victor See, Sean P. Matt, Colin P. Folsom +15
Low-mass stars are known to have magnetic fields that are believed to be of dynamo origin. Two complementary techniques are principally used to characterise them. Zeeman-Doppler im…
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…
Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles
S. Boro Saikia, C. J. Marvin, S. V. Jeffers +6
Chromospheric activity monitoring of a wide range of cool stars can provide valuable information on stellar magnetic activity and its dependence on fundamental stellar parameters s…
The open flux evolution of a solar-mass star on the main sequence
V. See, M. Jardine, A. A. Vidotto +9
Magnetic activity is known to be correlated to the rotation period for moderately active main sequence solar-like stars. In turn, the stellar rotation period evolves as a result of…
The relation between stellar magnetic field geometry and chromospheric activity cycles I: The highly variable field of Epsilon Eridani at activity minimum
S. V. Jeffers, S. Boro Saikia, J. R. Barnes +4
The young and magnetically active K dwarf Epsilon Eridani exhibits a chromospheric activity cycle of about 3 years. Previous reconstructions of its large-scale magnetic field show…
Studying stellar spin-down with Zeeman-Doppler magnetograms
V. See, M. Jardine, A. A. Vidotto +11
Magnetic activity and rotation are known to be intimately linked for low-mass stars. Understanding rotation evolution over the stellar lifetime is therefore an important goal withi…
The connection between stellar activity cycles and magnetic field topology
V. See, M. Jardine, A. A. Vidotto +14
Zeeman Doppler imaging has successfully mapped the large-scale magnetic fields of stars over a large range of spectral types, rotation periods and ages. When observed over multiple…
A solar-like magnetic cycle on the mature K-dwarf 61 Cyg A (HD 201091)
S. Boro Saikia, S. V. Jeffers, J. Morin +9
The long-term monitoring of magnetic cycles in cool stars is a key diagnostic in understanding how dynamo generation and amplification of magnetic fields occur in stars similar in…
Could a change in magnetic field geometry cause the break in the wind-activity relation?
A. A. Vidotto, J. -F. Donati, M. Jardine +8
Wood et al suggested that mass-loss rate is a function of X-ray flux () for dwarf stars with erg cm s.…
The energy budget of stellar magnetic fields
V. See, M. Jardine, A. A. Vidotto +15
Spectropolarimetric observations have been used to map stellar magnetic fields, many of which display strong bands of azimuthal fields that are toroidal. A number of explanations h…
Variable magnetic field geometry of the young sun HN Peg (HD 206860)
S. Boro Saikia, S. V. Jeffers, P. Petit +3
The large-scale magnetic field of solar-type stars reconstructed from their spectropolarimetric observations provide important insight into their underlying dynamo processes.We aim…