MULTIPLE COMPONENT OUTFLOWS IN AN ACTIVE REGION OBSERVED WITH THE EUV IMAGING SPECTROMETER ON HINODE

Bryans, P; Young, P R; Doschek, G A

doi:10.1088/0004-637X/715/2/1012

Title: MULTIPLE COMPONENT OUTFLOWS IN AN ACTIVE REGION OBSERVED WITH THE EUV IMAGING SPECTROMETER ON HINODE

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Abstract

We have used the Extreme Ultraviolet Imaging Spectrometer on the Hinode spacecraft to observe large areas of outflow near an active region. These outflows are seen to persist for at least 6 days. The emission line profiles suggest that the outflow region is composed of multiple outflowing components, Doppler-shifted with respect to each other. We have modeled this scenario by imposing a double-Gaussian fit to the line profiles. These fits represent the profile markedly better than a single-Gaussian fit for Fe XII and XIII emission lines. For the fastest outflowing components, we find velocities as high as 200 km s{sup -1}. However, there remains a correlation between the fitted line velocities and widths, suggesting that the outflows are not fully resolved by the double-Gaussian fit and that the outflow may be comprised of further components.

Authors:

Bryans, P; Young, P R; Doschek, G A ^[1]

Naval Research Laboratory, 4555 Overlook Ave. SW Washington, DC 20375 (United States)

Publication Date:: Tue Jun 01 00:00:00 EDT 2010

OSTI Identifier:: 21450913

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal

Additional Journal Information:: Journal Volume: 715; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/715/2/1012; Journal ID: ISSN 0004-637X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DOPPLER EFFECT; EXTREME ULTRAVIOLET RADIATION; IRON; PHOTON EMISSION; SUN; ELECTROMAGNETIC RADIATION; ELEMENTS; EMISSION; MAIN SEQUENCE STARS; METALS; RADIATIONS; STARS; TRANSITION ELEMENTS; ULTRAVIOLET RADIATION

Citation Formats


                    Bryans, P, Young, P R, and Doschek, G A. MULTIPLE COMPONENT OUTFLOWS IN AN ACTIVE REGION OBSERVED WITH THE EUV IMAGING SPECTROMETER ON HINODE.  United States: N. p., 2010. 
        Web.  doi:10.1088/0004-637X/715/2/1012.

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                    Bryans, P, Young, P R, & Doschek, G A. MULTIPLE COMPONENT OUTFLOWS IN AN ACTIVE REGION OBSERVED WITH THE EUV IMAGING SPECTROMETER ON HINODE.  United States.  https://doi.org/10.1088/0004-637X/715/2/1012

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                    Bryans, P, Young, P R, and Doschek, G A. 2010.  
        "MULTIPLE COMPONENT OUTFLOWS IN AN ACTIVE REGION OBSERVED WITH THE EUV IMAGING SPECTROMETER ON HINODE".  United States.  https://doi.org/10.1088/0004-637X/715/2/1012.

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@article{osti_21450913,

  title        = {MULTIPLE COMPONENT OUTFLOWS IN AN ACTIVE REGION OBSERVED WITH THE EUV IMAGING SPECTROMETER ON HINODE},

  author       = {Bryans, P and Young, P R and Doschek, G A},

  abstractNote = {We have used the Extreme Ultraviolet Imaging Spectrometer on the Hinode spacecraft to observe large areas of outflow near an active region. These outflows are seen to persist for at least 6 days. The emission line profiles suggest that the outflow region is composed of multiple outflowing components, Doppler-shifted with respect to each other. We have modeled this scenario by imposing a double-Gaussian fit to the line profiles. These fits represent the profile markedly better than a single-Gaussian fit for Fe XII and XIII emission lines. For the fastest outflowing components, we find velocities as high as 200 km s{sup -1}. However, there remains a correlation between the fitted line velocities and widths, suggesting that the outflows are not fully resolved by the double-Gaussian fit and that the outflow may be comprised of further components.},

  doi          = {10.1088/0004-637X/715/2/1012},

  url          = {https://www.osti.gov/biblio/21450913},
  journal      = {Astrophysical Journal},

  issn         = {0004-637X},

  number       = 2,

  volume       = 715,

  place        = {United States},

  year         = {Tue Jun 01 00:00:00 EDT 2010},

  month        = {Tue Jun 01 00:00:00 EDT 2010}

}

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