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Abstract:
Stealth coronal mass ejections (CMEs) are a class of eruptions that typically manifest as slow streamer-blowout CMEs in white-light coronagraph observations that lack the standard/expected set of corresponding low coronal signatures (LCSs) in EUV and X-ray observations. The lack of LCSs makes identifying stealth CMEs' source regions and pre-eruption configurations particularly challenging, even with multiple viewpoints. However, a lack of standard/expected LCSs does not mean there are absolutely no LCSs whatsoever, it just means that specific data processing techniques and observing strategies are required to tease out very faint and/or unexpected signatures of the eruptions. From the debate over whether stealth CMEs originate from a fundamentally different eruptive process than normal CMEs, the (majority?) consensus that has emerged is that stealth CMEs represent the lowest-energy subset of typical slow streamer-blowout CMEs. In this presentation, I will summarize the results from several recent attempts to model stealth CME eruptions (and/or slow streamer-blowout CMEs) and discuss some origin scenarios that may result in difficulty identifying the corresponding LCSs and therefore the initiation and eruption mechanism(s) that are ultimately responsible for the destabiliation/loss-of-equilibrium of the pre-eruption configurations.
