news, resources, and most recent solar working drafts (1) mauna loa solar observatory newsletter feb...
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![Page 1: NEWS, RESOURCES, AND MOST RECENT SOLAR WORKING DRAFTS (1) Mauna Loa Solar Observatory Newsletter Feb 2009 (2) Introduction to the Solar and Space Weather](https://reader034.vdocuments.mx/reader034/viewer/2022051619/56649d605503460f94a40e5b/html5/thumbnails/1.jpg)
NEWS, RESOURCES, AND MOST RECENT SOLAR WORKING DRAFTS
(1) Mauna Loa Solar Observatory Newsletter Feb 2009
(2) Introduction to the Solar and Space Weather Research Group (SOS) at Korea
(3) Introduction to a highly-automated electronic archive
(4) Quick overview of most recent drafts on arXiv
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Episodic X-ray Emission Accompanying the Activation of an Eruptive Prominence: Evidence of Episodic Magnetic Reconnection
Wei W. Liu, Tong-Jiang Wang, Brian R. Dennis,
Gordon D. Holmansubmitted to ApJ on 11 Feb 2009
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Background
> Investigations of prominence eruptions can provide critical clues to physics of CMEs and flares.
(1) Ideal MHD process, such as the kink instability of a flux rope
(2) Nonideal MHD process, where magnetic reconnection (tether-cutting or break-out) plays an important role
> The first detailed investigation of both morphology and spectra of X-ray emission accompanying a prominence eruption.> partially occulted C7.7 flare on 03Apr23
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1. Episodic X-ray emission during the activation and rise of the prominence (preheating phase of the flare)
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2. Signatures of a vertical current sheet trailing the prominence eruption
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Conclusion
1. During preheating phase, there are 3 episodes of morphological changes of the (thermal) X-ray emission from a single source to a double source primarily below the apex of the prominence faster magnetic reconnection or a larger energy release rate, supporting the tether-cutting over the breakout model
2. During the impulsive phase, the energy-dependent structure of X-ray sources & an extending bright EUV ridge the existence of a current sheet trailing the erupting prominence as in CSHKP model
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New Views of EIT Wave and CME from STEREO
S. Ma, J. Lin, P. Chen, H. Chen
Proceedings of 10th Asian-Pacific Regional IAUMeeting 2008, 1–2 (2008)
Printed 10 February 2009
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Background
> There are still open questions as to EIT wave, such as whether it is “flare-driven” or “CME-driven”
> Some studies (e.g., Thompson 2000) found that some EIT waves may be CME-poor.
> The launch of STEREO may help to find the answer
> 07Dec 7, a small filament led to a B1.4 flare
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Weak front in 171 strong in 195; asymmetric about the center at first then becomes more and more symmetric
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STEREO B observed the CME in both COR1 and COR2, while STEREO A did not. Nor did SOHO/LASCO
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Conclusion
1. No CME associated with the EIT wave in STEREO A, but a contrary result was obtained from STEREO B
2. The CME was very narrow and roughly propagated toward STEREO A, so that it was almost totally blocked by the occulting disk of STEREO A.
3. Whether a CME is observed to associate with an EIT wave depends on the angle at which it is seen and on its brightness.
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Evolution of a Coronal Twisted Flux Rope
Nour-Eddine Raouafi
Proceedings of the Hinode 2 meetingSubmitted on 3 Feb 2009
> 2009 ApJL 691, L128