%0 Journal Article %T Mass Loss in Pre-main-sequence Stars via Coronal Mass Ejections and Implications for Angular Momentum Loss %+ Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)) %A Aarnio, Alicia N. %A Matt, Sean P. %A Stassun, Keivan G. %< avec comité de lecture %@ 0004-637X %J The Astrophysical Journal %I American Astronomical Society %V 760 %8 2012 %D 2012 %Z 1209.6410 %Z 2012ApJ...760....9A %R 10.1088/0004-637X/760/1/9 %K stars: activity %K stars: evolution %K stars: mass-loss %K stars: pre-main sequence %K stars: solar-type %K Astrophysics - Solar and Stellar Astrophysics %Z Sciences of the Universe [physics]Journal articles %X We develop an empirical model to estimate mass-loss rates via coronal mass ejections (CMEs) for solar-type pre-main-sequence (PMS) stars. Our method estimates the CME mass-loss rate from the observed energies of PMS X-ray flares, using our empirically determined relationship between solar X-ray flare energy and CME mass: log (M CME[g]) = 0.63 × log (E flare[erg]) - 2.57. Using masses determined for the largest flaring magnetic structures observed on PMS stars, we suggest that this solar-calibrated relationship may hold over 10 orders of magnitude in flare energy and 7 orders of magnitude in CME mass. The total CME mass-loss rate we calculate for typical solar-type PMS stars is in the range 10-12-10-9 M yr-1. We then use these CME mass-loss rate estimates to infer the attendant angular momentum loss leading up to the main sequence. Assuming that the CME outflow rate for a typical ~1 M T Tauri star is <10-10 M yr-1, the resulting spin-down torque is too small during the first ~1 Myr to counteract the stellar spin-up due to contraction and accretion. However, if the CME mass-loss rate is >~ 10-10 M yr-1, as permitted by our calculations, then the CME spin-down torque may influence the stellar spin evolution after an age of a few Myr. %G English %L insu-03621687 %U https://insu.hal.science/insu-03621687 %~ CEA %~ INSU %~ UNIV-PARIS7 %~ CNRS %~ DSM-IRFU %~ IRFU-AIM %~ CEA-DRF %~ UNIV-PARIS %~ UP-SCIENCES %~ GS-PHYSIQUE