X-ray flare oscillations track plasma sloshing along star-disk magnetic tubes in Orion star-forming region

Abstract

Pulsing X-ray emission tracks the plasma echo traveling in an extremely long magnetic tube that flares in an Orion Pre-Main Sequence (PMS) star. On the Sun, flares last from minutes to a few hours and the longest-lasting typically involve arcades of closed magnetic tubes. Long-lasting X-ray flares are observed in PMS stars. Large-amplitude (~20%) long-period (~3 hours) pulsations are detected in the light curve of day-long flares observed by the Advanced CCD Imaging Spectrometer (ACIS) on-board Chandra from PMS stars in the Orion cluster. Detailed hydrodynamic modeling of two flares observed on V772 Ori and OW Ori shows that these pulsations may track the sloshing of plasma along a single long magnetic tube, triggered by a sufficiently short (~1 hour) heat pulse. This magnetic tubes are as long (>= 20 solar radii) as to connect the star with the surrounding disk.

25 pages, 8 figures, movie upon request, accepted for publication

References in corpus (15)

• Quasi-periodic pulsations in solar and stellar flares: an overview of recent results
• Diagnostics of stellar flares from X-ray observations: from the decay to the rise phase
• The first observed stellar X-ray flare oscillation: Constraints on the flare loop length and the magnetic field
• X-ray emission from MP Muscae: an old classical T Tauri star
• X-Ray flares in Orion Young Stars. II. Flares, Magnetospheres, and Protoplanetary Disks
• Data-driven Radiative Hydrodynamic Modeling of the 2014 March 29 X1.0 Solar Flare
• X-ray and EUV Observations of Simultaneous Short and Long Period Oscillations in Hot Coronal Arcade Loops
• High Resolution X-ray Spectroscopy of T Tauri Stars in the Taurus-Auriga Complex
• GALEX high time-resolution ultraviolet observations of dMe flare events
• The onset of X-ray emission in young stellar objects: a Chandra observation of the Serpens star-forming region
• Plasma sloshing in pulse-heated solar and stellar coronal loops
• Modelling of Reflective Propagating Slow-mode Wave in a Flaring Loop
• The Gould's Belt Very Large Array Survey III. The Orion region
• A coronal explosion on the flare star CN Leonis
• Star-disk interaction in classical T Tauri stars revealed using wavelet analysis

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