A time series of filament eruptions observed by three eyes from space: From failed to successful eruptions

Document Type

Article

Publication Date

5-1-2011

Abstract

We present stereoscopic observations of six sequential eruptions of a filament in the active region NOAA 11045 on 2010 Feb 8, with the advantage of the STEREO twin viewpoints in combination with Earth's viewpoint from SOHO instruments and ground-based telescopes. The last one of the six eruptions is a coronal mass ejection, but the others are not. The flare in this successful one is more intense than in the others. Moreover, the velocity of filament material in the successful one is also the largest among them. Interestingly, all the filament velocities are found to be proportional to the power of their flares. We calculate magnetic field intensity at low altitude, the decay indexes of the external field above the filament, and the asymmetry properties of the overlying fields before and after the failed eruptions and find little difference between them, indicating the same coronal confinement exists for both the failed and successful eruptions. The results suggest that, besides the confinement of the coronal magnetic field, the energy released in the low corona should be another crucial element affecting a failed or successful filament eruption. That is, a coronal mass ejection can only be launched if the energy released exceeds some critical value, given the same initial coronal conditions. © 2011 National Astronomical Observatories of Chinese Academy of Sciences and IOP Publishing Ltd.

Identifier

79955574685 (Scopus)

Publication Title

Research in Astronomy and Astrophysics

External Full Text Location

https://doi.org/10.1088/1674-4527/11/5/009

ISSN

16744527

First Page

594

Last Page

606

Issue

5

Volume

11

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