Coronal Mass Ejections from Magnetic Systems Encompassing Filament Channels Without Filaments

Pevtsov, Alexei A.; Panasenco, O.; Martin, Sara

doi:10.1007/978-1-4614-3761-1_13

Cited by 2 publications

(9 citation statements)

References 29 publications

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“…The footpoints of the eruption from the GCS model were found to be S18E04 and S16W18, illustrated by the blue X's in Figure 6. This was to the East and West of the small active region (NOAA 11165), and further North than the region triangulated by Pevtsov et al (2011). The footpoints are of a similar location to the dimmings found by (Nitta and Mulligan 2017) centered around S20.…”

Section: Discussionsupporting

confidence: 71%

“…The LASCO coronagraphs observed this CME as a faint partial halo that propagated to the south. This stealth CME was previously studied by Pevtsov et al (2011) who found, using a triangulation approach, the CME source region to be S35W10. In the vicinity of the approximated source region was a small active region (NOAA active region 2 http://solar.jhuapl.edu/Data-Products/COR-CME-Catalog.php 11165) and a filament channel as can be seen in Figure 6.…”

Section: Stealth Event 2: 03-march-2011mentioning

confidence: 93%

“…In the vicinity of the approximated source region was a small active region (NOAA active region 2 http://solar.jhuapl.edu/Data-Products/COR-CME-Catalog.php 11165) and a filament channel as can be seen in Figure 6. Pevtsov et al (2011) concluded that the filament channel was the CME source region. Nitta and Mulligan (2017) find two EUV dimmings centered around S20, the region in which the active region was present.…”

Section: Stealth Event 2: 03-march-2011mentioning

confidence: 99%

“…Stealth event 1 occurred on 27 October 2009 and stealth event 2 occurred on 03 March 2011. Both events have had their approximate source region determined using triangulation by Kilpua et al (2014) and Pevtsov et al (2011), respectively. We aim to investigate whether these stealth CMEs show signatures of the CSHKP standard model, albeit faint, in order to identify the exact source region.…”

Section: Introductionmentioning

confidence: 99%

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Stealth Coronal Mass Ejections from Active Regions

O’Kane¹,

Green²,

Long³

et al. 2019

ApJ

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Stealth coronal mass ejections (CMEs) are eruptions from the Sun that have no obvious low coronal signature. These CMEs are characteristically slower events, but can still be geoeffective and affect space weather at Earth. Therefore, understanding the science underpinning these eruptions will greatly improve our ability to detect and, eventually, forecast them. We present a study of two stealth CMEs analysed using advanced image processing techniques that reveal their faint signatures in observations from the extreme ultraviolet (EUV) imagers onboard the Solar and Heliospheric Observatory (SOHO), Solar Dynamics Observatory (SDO), and Solar Terrestrial Relations Observatory (STEREO) spacecraft. The different viewpoints given by these spacecraft provide the opportunity to study each eruption from above and the side contemporaneously. For each event, EUV and magnetogram observations were combined to reveal the coronal structure that erupted. For one event, the observations indicate the presence of a magnetic flux rope before the CME's fast rise phase. We found that both events originated in active regions and are likely to be sympathetic CMEs triggered by a nearby eruption. We discuss the physical processes that occurred in the time leading up to the onset of each stealth CME and conclude that these eruptions are part of the low-energy and velocity tail of a distribution of CME events, and are not a distinct phenomenon.

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Section: Discussionsupporting

confidence: 71%

Section: Stealth Event 2: 03-march-2011mentioning

confidence: 93%

Section: Stealth Event 2: 03-march-2011mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stealth Coronal Mass Ejections from Active Regions

O’Kane¹,

Green²,

Long³

et al. 2019

ApJ

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“…Ma et al [] conducted a statistical study of stealth CME events and concluded that their eruption velocities in the coronagraph fields of view were consistent with—and essentially defined—the low end of the CME speed distribution (

≲

300 km s −1 ). Pevtsov et al [] examined properties of the solar source regions for several slow‐ to moderate‐speed CME events that originated in “empty” filament channels, i.e., long polarity inversion lines in the underlying photospheric magnetic field distribution with highly sheared coronal magnetic fields but no discernible filament or prominence material. D'Huys et al [] followed up on the study by Ma et al [] by presenting a set of ∼40 stealth CME events.…”

Section: Introductionmentioning

confidence: 99%

A model for stealth coronal mass ejections

Lynch

Masson

et al. 2016

JGR Space Physics

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Stealth coronal mass ejections (CMEs) are events in which there are almost no observable signatures of the CME eruption in the low corona but often a well‐resolved slow flux rope CME observed in the coronagraph data. We present results from a three‐dimensional numerical magnetohydrodynamics (MHD) simulation of the 1–2 June 2008 slow streamer blowout CME that Robbrecht et al. (2009) called “the CME from nowhere.” We model the global coronal structure using a 1.4 MK isothermal solar wind and a low‐order potential field source surface representation of the Carrington Rotation 2070 magnetogram synoptic map. The bipolar streamer belt arcade is energized by simple shearing flows applied in the vicinity of the helmet streamer's polarity inversion line. The flows are large scale and impart a shear typical of that expected from the differential rotation. The slow expansion of the energized helmet streamer arcade results in the formation of a radial current sheet. The subsequent onset of expansion‐induced flare reconnection initiates the stealth CME while gradually releasing the stored magnetic energy. We present favorable comparisons between our simulation results and the multiviewpoint SOHO‐LASCO (Large Angle and Spectrometric Coronagraph) and STEREO‐SECCHI (Sun Earth Connection Coronal and Heliospheric Investigation) coronagraph observations of the preeruption streamer structure and the initiation and evolution of the stealth streamer blowout CME.

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Coronal Mass Ejections from Magnetic Systems Encompassing Filament Channels Without Filaments

Cited by 2 publications

References 29 publications

Stealth Coronal Mass Ejections from Active Regions

Stealth Coronal Mass Ejections from Active Regions

A model for stealth coronal mass ejections

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