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Title: NONPOTENTIALITY OF CHROMOSPHERIC FIBRILS IN NOAA ACTIVE REGIONS 11092 AND 9661

Abstract

In this paper, we present a method to automatically segment chromospheric fibrils from H{alpha} observations and further identify their orientation. We assume that chromospheric fibrils are aligned with the magnetic field. By comparing the orientation of the fibrils with the azimuth of the embedding chromospheric magnetic field extrapolated from a potential field model, the shear angle, a measure of nonpotentiality, along the fibrils is readily deduced. Following this approach, we make a quantitative assessment of the nonpotentiality of fibrils in two NOAA active regions (ARs): (1) the relatively simple AR 11092, observed with very high resolution by Interferometric Bidimensional Spectrometer, and (2) a {beta}-{gamma}-{delta} AR 9661, observed with median resolution by Big Bear Solar Observatory before and after an X1.6 flare.

Authors:
; ; ;  [1];  [2];  [3]
  1. Space Weather Research Laboratory, New Jersey Institute of Technology, Newark, NJ 07102 (United States)
  2. INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, I-50125 Firenze (Italy)
  3. Max Planck Institut fuer Sonnensystemforschung (MPS), Max-Planck-Strasse 2, 37191 Katlenburg-Lindau (Germany)
Publication Date:
OSTI Identifier:
21587496
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 739; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/739/2/67; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CHROMOSPHERE; FILAMENTS; MAGNETIC FIELDS; ORIENTATION; ATMOSPHERES; SOLAR ATMOSPHERE; STELLAR ATMOSPHERES

Citation Formats

Jing Ju, Yuan Yuan, Xu Yan, Wang Haimin, Reardon, Kevin, and Wiegelmann, Thomas, E-mail: ju.jing@njit.edu, E-mail: yy46@njit.edu, E-mail: yx2@njit.edu, E-mail: haimin@flare.njit.edu, E-mail: kreardon@arcetri.astro.it, E-mail: wiegelmann@linmpi.mpg.de. NONPOTENTIALITY OF CHROMOSPHERIC FIBRILS IN NOAA ACTIVE REGIONS 11092 AND 9661. United States: N. p., 2011. Web. doi:10.1088/0004-637X/739/2/67; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Jing Ju, Yuan Yuan, Xu Yan, Wang Haimin, Reardon, Kevin, & Wiegelmann, Thomas, E-mail: ju.jing@njit.edu, E-mail: yy46@njit.edu, E-mail: yx2@njit.edu, E-mail: haimin@flare.njit.edu, E-mail: kreardon@arcetri.astro.it, E-mail: wiegelmann@linmpi.mpg.de. NONPOTENTIALITY OF CHROMOSPHERIC FIBRILS IN NOAA ACTIVE REGIONS 11092 AND 9661. United States. doi:10.1088/0004-637X/739/2/67; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Jing Ju, Yuan Yuan, Xu Yan, Wang Haimin, Reardon, Kevin, and Wiegelmann, Thomas, E-mail: ju.jing@njit.edu, E-mail: yy46@njit.edu, E-mail: yx2@njit.edu, E-mail: haimin@flare.njit.edu, E-mail: kreardon@arcetri.astro.it, E-mail: wiegelmann@linmpi.mpg.de. Sat . "NONPOTENTIALITY OF CHROMOSPHERIC FIBRILS IN NOAA ACTIVE REGIONS 11092 AND 9661". United States. doi:10.1088/0004-637X/739/2/67; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
@article{osti_21587496,
title = {NONPOTENTIALITY OF CHROMOSPHERIC FIBRILS IN NOAA ACTIVE REGIONS 11092 AND 9661},
author = {Jing Ju and Yuan Yuan and Xu Yan and Wang Haimin and Reardon, Kevin and Wiegelmann, Thomas, E-mail: ju.jing@njit.edu, E-mail: yy46@njit.edu, E-mail: yx2@njit.edu, E-mail: haimin@flare.njit.edu, E-mail: kreardon@arcetri.astro.it, E-mail: wiegelmann@linmpi.mpg.de},
abstractNote = {In this paper, we present a method to automatically segment chromospheric fibrils from H{alpha} observations and further identify their orientation. We assume that chromospheric fibrils are aligned with the magnetic field. By comparing the orientation of the fibrils with the azimuth of the embedding chromospheric magnetic field extrapolated from a potential field model, the shear angle, a measure of nonpotentiality, along the fibrils is readily deduced. Following this approach, we make a quantitative assessment of the nonpotentiality of fibrils in two NOAA active regions (ARs): (1) the relatively simple AR 11092, observed with very high resolution by Interferometric Bidimensional Spectrometer, and (2) a {beta}-{gamma}-{delta} AR 9661, observed with median resolution by Big Bear Solar Observatory before and after an X1.6 flare.},
doi = {10.1088/0004-637X/739/2/67; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 739,
place = {United States},
year = {2011},
month = {10}
}