Trajectories of microwave prominence eruptions

Hori, K.; Culhane, J. L.

doi:10.1051/0004-6361:20011658

Cited by 47 publications

(33 citation statements)

References 42 publications

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“…However, Jing et al (2004) concluded that 56% of the filament eruptions were associated with CMEs. We found that 79.3% of the filament eruptions are associated with CMEs, consistent with Gopalswamy et al (2003) (83%), lower than Gilbert et al (2000) (94%) and Hori & Culhane (2002) (92%), but higher than Jing et al (2004) (56%). Furthermore, Jing et al (2004) reported that AR filament eruptions had a flare association of 95%, which is higher than ours (58.6%).…”

Section: Conclusion and Discussionsupporting

confidence: 78%

“…The relationship between filament eruptions and other phenomena of solar activities has already been investigated (Subramanian & Dere 2001;Hori & Culhane 2002;Zhou et al 2003). Gilbert et al (2000) found that 94% of the eruptive filaments had an associated CME, and Hori & Culhane (2002) proposed that 92% of the prominence eruptions were associated with CMEs.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…Gilbert et al (2000) found that 94% of the eruptive filaments had an associated CME, and Hori & Culhane (2002) proposed that 92% of the prominence eruptions were associated with CMEs. Gopalswamy et al (2003) reported that 83% of the radial events had a strong correlation to the CMES.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Study of the first productive active region in solar cycle 24

Zhang

et al. 2012

A&A

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Context. The Sun is very quiet with less sunspots and activity since the beginning of solar cycle 24. However, the active region (AR) 11 045 emerged on February 5, 2010, is associated with 43 (8 M-and 35 C-class) flares, 53 coronal mass ejections (CMEs), 29 filament eruptions, 19 extreme ultraviolet (EUV) waves and abundant jets, indicating that this AR is the first productive one of solar cycle 24. Aims. We study the AR evolution and its associated activities, and also their relationships, to understand this productive AR. Methods. We used SOHO/MDI magnetograms to study the magnetic fields, STEREO/SECCHI images to explore the activities, and GOES measurements to investigate the soft X-ray flux of the AR. Results. During the AR evolution, six pairs of main magnetic fields emerged, and 93.1% flares and 82.75% filament eruption occurred in the emergence and stable phases of the magnetic flux. However, 43.4% CMEs occurred in the decaying phase, even though there were less flares. An example is given to show that an event is related to a flare, a filament eruption, a CME and an EUV wave from inner corona to outer corona in space, and the filament eruption and EUV wave occur near the peak time of the flare. Among the 29 filament eruptions, 79.3% are associated with CMEs, as well as 58.6%, associated with flares, and 34.5%, associated with EUV waves. During the 12-day active phase, 575 jets are detected with a daily occurrence rate of 49.3. This is the first time that so many jets have been identified in one AR, implying at least 575 lower magnetic reconnection processes during the AR evolution. We statistically studied these jets along with the AR evolution, and noticed that the jets mostly occurred surrounding the emerging flux. We also investigated the spatio-temporal relationships between the jets and the flares, and find that the jets are usually rooted around the flare cores, and the soft X-ray flux is inverse correlated with the number of the jets, especially during the beginning 9 days since the AR emergence. In comparison with AR 11045, we studied the other newly emerging AR 11045, and obtained similar results. The relationships between the jets and the flares may well represent a scenario of two-step magnetic reconnection. Using schematic diagrams, we explain the remarkable magnetic field emergence, cancelation and shear motion of AR 11045, and its associated activities.

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Section: Conclusion and Discussionsupporting

confidence: 78%

Section: Conclusion and Discussionmentioning

confidence: 99%

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Study of the first productive active region in solar cycle 24

Zhang

et al. 2012

A&A

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“…Most PEs are located at 30°-50°latitudes except during maxima, when HL PEs occur. PEs are almost always associated with CMEs, and hence indicate sites of large-scale energy release (see, e.g., Hori & Culhane 2002;Gopalswamy et al 2003bGopalswamy et al , 2015. Cessation of HL PEs roughly coincide with polarity reversals.…”

Section: Observationsmentioning

confidence: 99%

Unusual Polar Conditions in Solar Cycle 24 and Their Implications for Cycle 25

Gopalswamy

Yashiro

Akiyama

2016

ApJL

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We report on the prolonged solar-maximum conditions until late 2015 at the north-polar region of the Sun indicated by the occurrence of high-latitude prominence eruptions (PEs) and microwave brightness temperature close to the quiet-Sun level. These two aspects of solar activity indicate that the polarity reversal was completed by mid-2014 in the south and late 2015 in the north. The microwave brightness in the south-polar region has increased to a level exceeding the level of the Cycle 23/24 minimum, but just started to increase in the north. The northsouth asymmetry in the polarity reversal has switched from that in Cycle 23. These observations lead us to the hypothesis that the onset of Cycle 25 in the northern hemisphere is likely to be delayed with respect to that in the southern hemisphere. We find that the unusual condition in the north is a direct consequence of the arrival of poleward surges of opposite polarity from the active region belt. We also find that multiple rush-to-the-pole episodes were indicated by the PE locations that lined up at the boundary between opposite-polarity surges. The high-latitude PEs occurred in the boundary between the incumbent polar flux and the insurgent flux of opposite polarity.

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“…A prominence may be heated during eruption and thus can brighten in emission (Filippov & Koutchmy 2002;Karlicky & Simberova 2002). Radio tracking of eruptive prominences show constant acceleration at heights solar radii (Klein & Mouradian 2002), and տ 0.5 92% of eruptive prominences were found to be associated with CMEs (Hori & Culhane 2002). Prominence plasma is only partially ionized and the draining of hydrogen lasts typically a day, much longer than for helium (Gilbert et al 2002).…”

Section: Filaments and Prominencesmentioning

confidence: 99%

Astrophysics in 2002

Trimble

Aschwanden

2003

PUBL ASTRON SOC PAC

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ABSTRACT. This has been the Year of the Baryon. Some low temperature ones were seen at high redshift, some high temperature ones were seen at low redshift, and some cooling ones were (probably) reheated. Astronomers saw the back of the Sun (which is also made of baryons), a possible solution to the problem of ejection of material by Type II supernovae (in which neutrinos push out baryons), the production of R Coronae Borealis stars (previously-owned baryons), and perhaps found the missing satellite galaxies (whose failing is that they have no baryons). A few questions were left unanswered for next year, and an attempt is made to discuss these as well.

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Trajectories of microwave prominence eruptions

Cited by 47 publications

References 42 publications

Study of the first productive active region in solar cycle 24

Study of the first productive active region in solar cycle 24

Unusual Polar Conditions in Solar Cycle 24 and Their Implications for Cycle 25

Astrophysics in 2002

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