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http://dx.doi.org/10.5303/JKAS.2003.36.spc1.013

OBSERVATIONAL TESTS OF CHROMOSPHERIC MAGNETIC RECONNECTION  

CHAE JONGCHUL (Department of Astronomy and Space Science, Chungnam National University, Big Bear Solar Observatory, NJIT)
MOON YONG-JAE (Big Bear Solar Observatory, NJIT, Korea Astronomy Observatory)
PARK SO-YOUNG (Department of Astronomy and Space Science, Chungnam National University)
Publication Information
Journal of The Korean Astronomical Society / v.36, no.spc1, 2003 , pp. 13-20 More about this Journal
Abstract
Observations have indicated that magnetic reconnect ion may occur frequently in the photosphere and chromosphere as well as in the solar corona. The observed features include cancelling magnetic features seen in photospheric magnetograms, and different kinds of small-scale activities such as UV explosive events and EUV jets. By integrating the observed parameters of these features with the Sweet-Parker reconnect ion theory, an attempt is made to clarify the nature of chromospheric magnetic reconnection. Our results suggest that magnetic reconnect ion may be occurring at many different levels of the photosphere and chromosphere without a preferred height and at a faster speed than is predicted by the Sweet-Parker reconnect ion model using the classical value of electric conductivity. Introducing an anomalous magnetic diffusivity 10-100 times the classical value is one of the possible ways of explaining the fast reconnect ion as inferred from observations.
Keywords
sun: magnetic fields; sun: chromosphere; sun: corona; magnetic reconnection;
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1 Webb, D. F., Martin, S. F., Moses, D., & Harvey, J. W. 1993, The correspondence between X-ray bright points and evolving magnetic features in the quiet sun, Sol. Phys., 144, 15   DOI
2 Yokoyama, T., & Shibata, K. 1994, What is the condition for fast magnetic reconnection?, ApJ, 436, L197   DOI   ScienceOn
3 Zhang, J., Wang, J., Deng, Y., & Wu, D.: 2001, Magnetic Flux Cancellation Associated with the Major Solar Event on 2000 July 14, ApJ, 548, L99   DOI   ScienceOn
4 Zwaan, C. 1987, Elements and patterns in the solar magnetic field, ARA&A, 25, 83   DOI   ScienceOn
5 Moon, Y.-J., Chae, J., Choe, G. S., Wang, H., & Park, Y. D. 2003, PreFlare Activity And Filament Initiation Associated With An X1. 8 Flare, ApJ,submitted
6 Parker, E. N. 1957, Sweet's Mechanism for Merging Magnetic Fields in Conducting Fluids, J. Geophys. Res., 62, 509   DOI
7 Petschek, H. E. 1964, Magnetic Field Annihilation, in Physics of Solar Flares, ed. W. H. Hess, 425
8 Priest, E. R., Parnell, C. E., & Martin, S. F. 1994, A converging flux model of an X-ray bright point and an associated canceling magnetic feature, ApJ, 427, 459   DOI
9 Sturrock, P. A. 1999, Chromospheric Magnetic Reconnection and Its Possible Relationship to Coronal Heating, ApJ, 521, 451   DOI   ScienceOn
10 Sweet, P. A. 1958, The Neutral Point Theory of Solar Flares, IAU symposium, 6, 123
11 Vernazza, J. E., Avrett, E. H., & Loeser, R. 1981, Structure of the solar chromosphere. III - Models of the EUV brightness components of the quiet-sun, ApJS. 45, 635   DOI
12 Wang, J., & Shi, Z. 1993, The flare-associated magnetic changes in an active region. II - Flux emergence and cancellation, Sol. Phys., 143, 119   DOI
13 Martin, S. F. 1990, Small-Scale Magnetic Features Observed in the Photosphere, in J. 0. Stenflo (ed.), Solar Photosphere: Structure, Convection and Magnetic Fields, IAU Symposium, 138, 129
14 Kim, J., Yun, H. S., Lee, S., Chae, J., Goode, P. R., & Wang H. 2001, A Rapid Change in Magnetic Connectivity Observed Before Filament Eruption and Its Associated Flare, ApJ, 547, L85   DOI   ScienceOn
15 Martin, S. F., Livi, S. H. B., & Wang, J. 1985, The cancellation of magnetic flux. II - In a decaying active region, Australian J. Phys., 38, 929   DOI
16 Harvey, K. L., Jones, H. P., Schrijver, C. J., & Penn, M. J. 1999, Does Magnetic Flux Submerge at Flux Cancelation Sites?, Sol. Phys., 190, 35   DOI
17 Hermans, L. M., & Martin, S. F.: 1986, Small-scale eruptive filaments on the quiet sun, in A. I. Poland (ed.), Coronal and Prominence Plasmas, 369
18 Kubat, J., & Karlicky M. 1986, Electrical conductivity in the solar photosphere and chromosphere, Bull. Astron.l Inst. Czechoslovakia, 37, 155
19 Lee, C., Chae, J., & Wang, H. 2000, Dynamical Characteristics of Small-Scale H Upflow Events on the Quiet Sun, ApJ, 545, 1124   DOI   ScienceOn
20 Lee, S., Yun, H. S., Chae, J., Goode, P. R. 2003, Small-scale Ha Dynamic Features Supported by Chromospheric Magnetic Reconnection, JKAS, 36, S21
21 Litvinenko, Y. 1999, Photospheric Magnetic Reconnection and Canceling Magnetic Features on the Sun, ApJ, 515, 435   DOI   ScienceOn
22 Litvinenko, Y.,& Martin, S. F. 1999, Magnetic reconnection as the cause of a photospheric canceling feature and mass flows in a filament, Sol. Phys., 190, 45   DOI
23 Livi, S. H. B., Wang, J., & Martin, S. F. 1985, The cancellation of magnetic flux. I - On the quiet sun, Australian J. Phys., 38, 855   DOI
24 Chae, J., Denker, C., Spirock, T. J., Wang, H., & Goode P. R. 2000, High-Resolution H Observations of Proper Motion in NOAA 8668: Evidence for Filament Mass In jection by Chromospheric Reconnection, Sol. Phys., 195, 333   DOI   ScienceOn
25 Livi, S. H. B., Martin, S., Wang, H., & Ai, G. 1989, The association of flares to cancelling magnetic features on the sun, Sol. Phys., 121, 197
26 Chae, J., Wang, H., Lee, C.-Y., Goode, & P. R. Sch$\"{u}$hle, U. 1998b, Chromospheric Upfolw Events Associated with Transition Region Explosive Events, ApJ, 504, L123   DOI   ScienceOn
27 Chae, J., Qiu, J., Wang, H., & Goode, P. R. 1999, Extreme Ultraviolet Jets and Halpha Surges in Solar Microflares, ApJ, 513, L75   DOI   ScienceOn
28 Chae, J., Wang, H., Qiu, J., Goode, P. R., Strous, L., & Yun H. S.: 2001, The Formation of a Prominence in Active Region NOAA 8668. I. SOHO/MDI Observations of Magnetic Field Evolution, ApJ, 560 , 476   DOI   ScienceOn
29 Chae, J., Moon, Y.-J., Wang, H., & Yun, H. S. 2002a, Flux Cancellation Rates and Converging Speeds of Cancelling Magnetic Features, Sol. Phys., 207, 73   DOI   ScienceOn
30 Chae, J., Park, Y. D., Moon, Y.-J., Wang, H., & Yun, H. S. 2002b, Temperatures of EUV-Emitting Plasma Structures Observed by the Transition Region And Coronal Explorer, ApJ, 567, L159   DOI   ScienceOn
31 Chae, J., Choi, B., Park, M. 2002c, Chromospheric Magnetic Reconnection on the Sun, JKAS, 35, 59
32 Chae, J., Wang H., Lee C., Goode P. R., & Sch$\"{u}$hle U. 1998a, Photospheric Magnetic Field Changes Associated with Transition Region Explosive Events, ApJ, 497, L109   DOI   ScienceOn
33 Dere, K. P., Bartoe, J.-D. F., Brueckner, G. E., Ewing, J., & Lund, P. 1991, Explosive events and magnetic reconnection in the solar atmosphere, J. Geophys. Res., 96, 9399   DOI
34 Dere, K. P. 1994, Explosive events, magnetic reconnection, and coronal heating, Adv. Space Res., 14, 13
35 Chae, J. 2003, The Formation of a Prominence in NOAA Active Region 8668. II. Trace Observations of Jets and Eruptions Associated with Cancelling Magnetic Features, ApJ, 584, 1084   DOI   ScienceOn