activity
20062025
most citedMagnetic fields and accretion flows on the classical T Tauri star V2129 Oph

195 citations · 1.4k across the 25 of their papers we have counts for

collaborators

25 papers

astro-ph.SR2025

Modelling the emergence and evolution of the rotation-activity relation

Kieran A. Stuart, Scott G. Gregory

Main-sequence stars follow a well-defined rotation-activity relation. There are two primary regimes: saturated, where the fractional X-ray luminosity is appro…

astro-ph.SR2023

Stable accretion in young stars: The cases of EX Lupi and TW Hya

A. Sicilia-Aguilar, J. Campbell-White, V. Roccatagliata +8

We examine the long-term spectroscopic and photometric variability of EX~Lupi and TW~Hya, studying the presence of stable accretion and the role it plays in the observed variabilit…

astro-ph.SR2023

X-ray emission from pre-main sequence stars with multipolar magnetic fields

Kieran A. Stuart, Scott G. Gregory

The large-scale magnetic fields of several pre-main sequence (PMS) stars have been observed to be simple and axisymmetric, dominated by tilted dipole and octupole components. The m…

astro-ph.SR2018★ 46 cited

Inner disk structure of the classical T Tauri star LkCa 15

S. H. P. Alencar, J. Bouvier, J. -F. Donati +15

Magnetospheric accretion has been thoroughly studied in young stellar systems with full non-evolved accretion disks, but it is poorly documented for transition disk objects with la…

astro-ph.SR2017★ 15 cited

Magnetic activity and radial velocity filtering of young Suns: The weak-line T Tauri stars Par 1379 and Par 2244

C. A. Hill, A. Carmona, J. -F. Donati +5

We report the results of our spectropolarimetric monitoring of the weak-line T-Tauri stars (wTTSs) Par 1379 and Par 2244, within the MaTYSSE (Magnetic Topologies of Young Stars and…

astro-ph.SR2015★ 72 cited

Magnetic activity and hot Jupiters of young Suns: the weak-line T Tauri stars V819 Tau and V830 Tau

JF Donati, E Hébrard, G Hussain +19

We report results of a spectropolarimetric and photometric monitoring of the weak-line T Tauri stars (wTTSs) V819 Tau and V830 Tau within the MaTYSSE programme, involving the ESPaD…