MAGNETIC-RECONNECTION GENERATED SHOCK WAVES AS A DRIVER OF SOLAR SURGES

被引：19

作者：

Yang, Heesu ^{[1
]}

Chae, Jongchul ^{[1
]}

Lim, Eun-Kyung ^{[2
]}

Lee, Kyoung-Sun ^{[3
]}

Park, Hyungmin ^{[1
]}

Song, Dong-Uk ^{[1
]}

Cho, Kyuhyoun ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul 151747, South Korea

[2] Korea Astron & Space Sci Inst, Taejon 305348, South Korea

[3] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2014年 / 790卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

shock waves; Sun: chromosphere; Sun: flares; Sun: transition region; H-ALPHA SURGES; X-RAY JETS; ELLERMAN BOMBS; VELOCITY-FIELD; HYDRODYNAMICS; ATMOSPHERE; FLUX;

D O I：

10.1088/2041-8205/790/1/L4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We found that a surge consists of multiple shock features. In our high-spatiotemporal spectroscopic observation of the surge, each shock is identified with the sudden appearance of an absorption feature at the blue wings of the Ca II 8542 angstrom line and Ha line that gradually shifts to the red wings. The shock features overlap with one another with the time interval of 110 s, which is much shorter than the duration of each shock feature, 300-400 s. This finding suggests that the multiple shocks might not have originated from a train of sinusoidal waves generated by oscillations and flows in the photosphere. As we found the signature of the magnetic flux cancelations at the base of the surge, we conclude that the multiple shock waves in charge of the surge were generated by the magnetic reconnection that occurred in the low atmosphere in association with the flux cancelation.

引用

页数：5

共 24 条

[1] H alpha surges and X-ray jets in AR 7260 [J].

Canfield, RC ;

Reardon, KP ;

Leka, KD ;

Shibata, K ;

Yokoyama, T ;

Shimojo, M .

ASTROPHYSICAL JOURNAL, 1996, 464 (02) :1016-1029

[2]

Cao W., 2010, P SOC PHOTO-OPT INS, V7735, P77355

[3] Formation of solar calcium H and K bright grains [J].

Carlsson, M ;

Stein, RF .

ASTROPHYSICAL JOURNAL, 1997, 481 (01) :500-&

[4] Extreme-ultraviolet jets and Hα surges in solar microflares [J].

Chae, J ;

Qiu, J ;

Wang, HM ;

Goode, PR .

ASTROPHYSICAL JOURNAL, 1999, 513 (01) :L75-L78

[5] Fast Imaging Solar Spectrograph of the 1.6 Meter New Solar Telescope at Big Bear Solar Observatory [J].

Chae, Jongchul ;

Park, Hyung-Min ;

Ahn, Kwangsu ;

Yang, Heesu ;

Park, Young-Deuk ;

Nah, Jakyoung ;

Jang, Bi Ho ;

Cho, Kyung-Suk ;

Cao, Wenda ;

Goode, Philip R. .

SOLAR PHYSICS, 2013, 288 (01) :1-22

[6]

Dara HC, 1997, ASTRON ASTROPHYS, V322, P653

[7] Chromospheric Alfvenic waves strong enough to power the solar wind [J].

De Pontieu, B. ;

McIntosh, S. W. ;

Carlsson, M. ;

Hansteen, V. H. ;

Tarbell, T. D. ;

Schrijver, C. J. ;

Title, A. M. ;

Shine, R. A. ;

Tsuneta, S. ;

Katsukawa, Y. ;

Ichimoto, K. ;

Suematsu, Y. ;

Shimizu, T. ;

Nagata, S. .

SCIENCE, 2007, 318 (5856) :1574-1577

[8] Statistics, morphology, and energetics of Ellerman bombs [J].

Georgoulis, MK ;

Rust, DM ;

Bernasconi, PN ;

Schmieder, B .

ASTROPHYSICAL JOURNAL, 2002, 575 (01) :506-528

[9] Acoustic waves in a stratified atmosphere IV. Three-dimensional nonlinear hydrodynamics [J].

Kalkofen, W. ;

Rossi, P. ;

Bodo, G. ;

Massaglia, S. .

ASTRONOMY & ASTROPHYSICS, 2010, 520

[10] Spectroscopic measurements of dynamic fibrils in the CaII λ8662 line [J].

Langangen, Oystein ;

Carlsson, Mats ;

Rouppe, Luc van der Voort ;

Hansteen, Viggo ;

De Pontieu, Bart .

ASTROPHYSICAL JOURNAL, 2008, 673 (02) :1194-1200

← 1 2 3 →