Brightening event in Hα and soft X-ray on May 1 1994

Y. H. Tang; Y. N. Li; B. Schmieder; G. Aulanier; P. Demoulin; C. Fang; T. Sakurai

doi:10.1016/S0273-1177(99)00629-8

Brightening event in Hα and soft X-ray on May 1 1994

Y. H. Tang
, Y. N. Li
, B. Schmieder
, G. Aulanier
, P. Demoulin
, C. Fang
, T. Sakurai

Research output: Contribution to journal › Article › peer-review

Abstract

By using Yohkoh soft X-ray images, vector magnetograms and Hα filtergrams, a brightening event that occurred on May 18, 1994 has been studied in detail. It occurred in a nearly potential large-scale magnetic configuration as shown by the comparisons between the magnetic extrapolations (linear force-free field) and the large-scale soft X-ray loops. This brightening event observed in Hα line and soft X-ray seems to be related to new emerging magnetic flux with an amount of photospheric magnetic flux of about 3 × 10 ²⁰ Mx. The emerging flux increases obviously about 20 minutes before the Hα and soft X-ray brightening, and lasts for about 10 ³ s. This brightening may be a signature of reconnection taking place between the pre-existing loop and the new emerging small loops.

Original language	English
Pages (from-to)	1829-1832
Number of pages	4
Journal	Advances in Space Research
Volume	25
Issue number	9
DOIs	https://doi.org/10.1016/S0273-1177(99)00629-8
Publication status	Published - 1 Jan 2000
Externally published	Yes

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Cite this

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title = "Brightening event in Hα and soft X-ray on May 1 1994",

abstract = " By using Yohkoh soft X-ray images, vector magnetograms and Hα filtergrams, a brightening event that occurred on May 18, 1994 has been studied in detail. It occurred in a nearly potential large-scale magnetic configuration as shown by the comparisons between the magnetic extrapolations (linear force-free field) and the large-scale soft X-ray loops. This brightening event observed in Hα line and soft X-ray seems to be related to new emerging magnetic flux with an amount of photospheric magnetic flux of about 3 × 10 20 Mx. The emerging flux increases obviously about 20 minutes before the Hα and soft X-ray brightening, and lasts for about 10 3 s. This brightening may be a signature of reconnection taking place between the pre-existing loop and the new emerging small loops.",

author = "Tang, \{Y. H.\} and Li, \{Y. N.\} and B. Schmieder and G. Aulanier and P. Demoulin and C. Fang and T. Sakurai",

year = "2000",

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doi = "10.1016/S0273-1177(99)00629-8",

language = "English",

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pages = "1829--1832",

journal = "Advances in Space Research",

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TY - JOUR

T1 - Brightening event in Hα and soft X-ray on May 1 1994

AU - Tang, Y. H.

AU - Li, Y. N.

AU - Schmieder, B.

AU - Aulanier, G.

AU - Demoulin, P.

AU - Fang, C.

AU - Sakurai, T.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - By using Yohkoh soft X-ray images, vector magnetograms and Hα filtergrams, a brightening event that occurred on May 18, 1994 has been studied in detail. It occurred in a nearly potential large-scale magnetic configuration as shown by the comparisons between the magnetic extrapolations (linear force-free field) and the large-scale soft X-ray loops. This brightening event observed in Hα line and soft X-ray seems to be related to new emerging magnetic flux with an amount of photospheric magnetic flux of about 3 × 10 20 Mx. The emerging flux increases obviously about 20 minutes before the Hα and soft X-ray brightening, and lasts for about 10 3 s. This brightening may be a signature of reconnection taking place between the pre-existing loop and the new emerging small loops.

AB - By using Yohkoh soft X-ray images, vector magnetograms and Hα filtergrams, a brightening event that occurred on May 18, 1994 has been studied in detail. It occurred in a nearly potential large-scale magnetic configuration as shown by the comparisons between the magnetic extrapolations (linear force-free field) and the large-scale soft X-ray loops. This brightening event observed in Hα line and soft X-ray seems to be related to new emerging magnetic flux with an amount of photospheric magnetic flux of about 3 × 10 20 Mx. The emerging flux increases obviously about 20 minutes before the Hα and soft X-ray brightening, and lasts for about 10 3 s. This brightening may be a signature of reconnection taking place between the pre-existing loop and the new emerging small loops.

U2 - 10.1016/S0273-1177(99)00629-8

DO - 10.1016/S0273-1177(99)00629-8

M3 - Article

AN - SCOPUS:0039175754

SN - 0273-1177

VL - 25

SP - 1829

EP - 1832

JO - Advances in Space Research

JF - Advances in Space Research

IS - 9

ER -

Brightening event in Hα and soft X-ray on May 1 1994

Abstract

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