2015
DOI: 10.1002/2015ja021415
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Kinematics of interacting CMEs of 25 and 28 September 2012

Abstract: We have studied two coronal mass ejections (CMEs) that occurred on 25 and 28 September 2012 and interacted near the Earth. By fitting the Graduated Cylindrical Shell model on the SECCHI/COR2 images and applying the Stereoscopic Self‐Similar Expansion method on the SECCHI/HI images, the initial direction of both the CMEs is estimated to be west of the Sun‐Earth line. Further, the three‐dimensional (3‐D) heliospheric kinematics of these CMEs have been estimated using Self‐Similar Expansion (SSE) reconstruction m… Show more

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Cited by 35 publications
(57 citation statements)
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References 119 publications
(131 reference statements)
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“…These calculations also supported the claim that a significant exchange of kinetic energy and momentum took place during the CME-CME collision Lugaz et al, 2012;Shen et al, 2012a;Maričić et al, 2014). In the same year, Mishra, Srivastava, and Singh (2015) used the same method to study the kinematics of the interacting CMEs of 25 and 28 September 2012. The collision of these two CMEs was found to be close to elastic.…”
Section: D Head-on Collision With Momentum Conservation Constraintsupporting
confidence: 60%
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“…These calculations also supported the claim that a significant exchange of kinetic energy and momentum took place during the CME-CME collision Lugaz et al, 2012;Shen et al, 2012a;Maričić et al, 2014). In the same year, Mishra, Srivastava, and Singh (2015) used the same method to study the kinematics of the interacting CMEs of 25 and 28 September 2012. The collision of these two CMEs was found to be close to elastic.…”
Section: D Head-on Collision With Momentum Conservation Constraintsupporting
confidence: 60%
“…Shen et al, 2012aShen et al, , 2013Colaninno and Vourlidas, 2015), (perfectly) inelastic collisions (e.g. Lugaz et al, 2012;Maričić et al, 2014;Mishra, Srivastava, and Chakrabarty, 2015) and nearly elastic collisions (Mishra and Srivastava, 2014;Mishra, Srivastava, and Singh, 2015) were also reported. This raises the question as to what controls the nature of the CME collision.…”
Section: Introductionmentioning
confidence: 99%
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“…Earlier studies have also revealed that use of different values of λ with the SSSE method give different estimates of the kinematics of CMEs Mishra, Srivastava, and Davies, 2014). It has been observed that for CMEs that are Earth-directed when STEREO spacecraft are behind the Sun, the SSSE method should be implemented with a value of λ as 90 • (Liu et al, , 2014Mishra, Srivastava, and Singh, 2015;Vemareddy and Mishra, 2015). In our case, the CMEs are Earth-directed and therefore the SSSE method is implemented with a value of λ as suggested in earlier studies.…”
Section: D Reconstruction Of Interacting Cmes In Hi Fovmentioning
confidence: 99%
“…The observed velocity of CME1 and CME2 before the collision is estimated as (u 1 , u 2 ) = (590, 865) km s −1 and the observed velocity of CME1 and CME2 after the collision is (v 1 , v 2 ) = (680, 680) km s −1 . To understand the nature of the collision of the two CMEs, we estimate the coefficient of restitution (e) of the colliding CME1 and CME2 following the formulations described in ;Mishra, Srivastava, and Singh (2015). The coefficient of restitution measures the bounciness of the collision and is defined as the ratio of their relative velocity of separation to their relative velocity of approach.…”
Section: Momentum Energy Exchange and Nature Of The Collisionmentioning
confidence: 99%