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Pregled bibliografske jedinice broj: 728149

Interaction Between Two CMEs During 14 – 15 February 2011 and Their Unusual Radio Signature


Shanmugaraju, Annamalai; Subramanian, Prasanna; Vršnak, Bojan; Ibrahim, Syed
Interaction Between Two CMEs During 14 – 15 February 2011 and Their Unusual Radio Signature // Solar physics, 289 (2014), 12; 4621-4632 doi:10.1007/s11207-014-0591-x (međunarodna recenzija, članak, znanstveni)


Naslov
Interaction Between Two CMEs During 14 – 15 February 2011 and Their Unusual Radio Signature

Autori
Shanmugaraju, Annamalai ; Subramanian, Prasanna ; Vršnak, Bojan ; Ibrahim, Syed

Izvornik
Solar physics (0038-0938) 289 (2014), 12; 4621-4632

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Coronal mass ejections Interacting coronal mass ejections Type-II radio bursts

Sažetak
We report a detailed analysis of an interaction between two coronal mass ejections (CMEs) that were observed on 14 – 15 February 2011 and the corresponding radio enhancement, which was similar to the “CME cannibalism” reported by Gopalswamy et al. (Astrophys. J. 548, L91, 2001). A primary CME, with a mean field-of-view velocity of 669 km s−1 in the Solar and Heliospheric Observatory (SOHO)/Large Angle Spectrometric Coronagraph (LASCO), was more than as twice as fast as the slow CME preceding it (326 km s−1), which indicates that the two CMEs interacted. A radio-enhancement signature (in the frequency range 1 MHz – 400 kHz) due to the CME interaction was analyzed and interpreted using the CME data from LASCO and from the Solar Terrestrial Relations Observatory (STEREO) HI-1, radio data from Wind/Radio and Plasma Wave Experiment (WAVES), and employing known electron-density models and kinematic modeling. The following results are obtained: i) The CME interaction occurred around 05:00 – 10:00 UT in a height range 20 – 25 R⊙. An unusual radio signature is observed during the time of interaction in the Wind/WAVES dynamic radio spectrum. ii) The enhancement duration shows that the interaction segment might be wider than 5 R⊙. iii) The shock height estimated using density models for the radio enhancement region is 10 – 30 R⊙. iv) Using kinematic modeling and assuming a completely inelastic collision, the decrease of kinetic energy based on speeds from LASCO data is determined to be 0.77×1023 J, and 3.67×1023 J if speeds from STEREO data are considered. vi) The acceleration, momentum, and force are found to be a=−168 m s−2, I=6.1×1018 kg m s−1, and F=1.7×1015 N, respectively, using STEREO data.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
6212 SOLSTEL

Ustanove
Geodetski fakultet, Zagreb

Profili:

Avatar Url Bojan Vršnak (autor)

Citiraj ovu publikaciju

Shanmugaraju, Annamalai; Subramanian, Prasanna; Vršnak, Bojan; Ibrahim, Syed
Interaction Between Two CMEs During 14 – 15 February 2011 and Their Unusual Radio Signature // Solar physics, 289 (2014), 12; 4621-4632 doi:10.1007/s11207-014-0591-x (međunarodna recenzija, članak, znanstveni)
Shanmugaraju, A., Subramanian, P., Vršnak, B. & Ibrahim, S. (2014) Interaction Between Two CMEs During 14 – 15 February 2011 and Their Unusual Radio Signature. Solar physics, 289 (12), 4621-4632 doi:10.1007/s11207-014-0591-x.
@article{article, year = {2014}, pages = {4621-4632}, DOI = {10.1007/s11207-014-0591-x}, keywords = {Coronal mass ejections Interacting coronal mass ejections Type-II radio bursts}, journal = {Solar physics}, doi = {10.1007/s11207-014-0591-x}, volume = {289}, number = {12}, issn = {0038-0938}, title = {Interaction Between Two CMEs During 14 – 15 February 2011 and Their Unusual Radio Signature}, keyword = {Coronal mass ejections Interacting coronal mass ejections Type-II radio bursts} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • NASA-ADS


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