PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION

Samanta, Tanmoy; Pant, Vaibhav; Banerjee, Dipankar

doi:10.1088/2041-8205/815/1/L16

Title: PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION

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Abstract

Spicules are small, hairy-like structures seen at the solar limb, mainly at chromospheric and transition region lines. They generally live for 3–10 minutes. We study these spicules in a south polar region of the Sun with coordinated observations using the Interface Region Imaging Spectrograph (IRIS) and the Atmospheric Imaging Assembly (AIA) instruments on board the Solar Dynamics Observatory. Propagating disturbances (PDs) are observed everywhere in the polar off-limb regions of the Sun at coronal heights. From these simultaneous observations, we show that the spicules and the PDs may have originated through a common process. From spacetime maps, we find that the start of the trajectory of PDs is almost cotemporal with the time of the rise of the spicular envelope as seen by IRIS slit-jaw images at 2796 and 1400 Å. During the return of spicular material, brightenings are seen in AIA 171 and 193 Å images. The quasi-periodic nature of the spicular activity, as revealed by the IRIS spectral image sequences, and its relation to coronal PDs, as recorded by the coronal AIA channels, suggest that they share a common origin. We propose that reconnection-like processes generate the spicules and waves simultaneously. The waves escape while the cool spicular material fallsmore » back.« less

Authors:

Samanta, Tanmoy; Pant, Vaibhav; Banerjee, Dipankar ^[1]

Indian Institute of Astrophysics, Koramangala, Bangalore 560034 (India)

Publication Date:: Thu Dec 10 00:00:00 EST 2015

OSTI Identifier:: 22518660

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal Letters

Additional Journal Information:: Journal Volume: 815; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CHROMOSPHERE; DISTURBANCES; IMAGES; MAGNETIC FIELDS; OSCILLATIONS; PERIODICITY; POLAR REGIONS; SOLAR CORONA; SOLAR PROMINENCES; SPACE-TIME; SUN; TRAJECTORIES; ULTRAVIOLET RADIATION

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                    Samanta, Tanmoy, Pant, Vaibhav, and Banerjee, Dipankar. PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION.  United States: N. p., 2015. 
        Web.  doi:10.1088/2041-8205/815/1/L16.

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                    Samanta, Tanmoy, Pant, Vaibhav, & Banerjee, Dipankar. PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION.  United States.  https://doi.org/10.1088/2041-8205/815/1/L16

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                    Samanta, Tanmoy, Pant, Vaibhav, and Banerjee, Dipankar. 2015.  
        "PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION".  United States.  https://doi.org/10.1088/2041-8205/815/1/L16.

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@article{osti_22518660,

  title        = {PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION},

  author       = {Samanta, Tanmoy and Pant, Vaibhav and Banerjee, Dipankar},

  abstractNote = {Spicules are small, hairy-like structures seen at the solar limb, mainly at chromospheric and transition region lines. They generally live for 3–10 minutes. We study these spicules in a south polar region of the Sun with coordinated observations using the Interface Region Imaging Spectrograph (IRIS) and the Atmospheric Imaging Assembly (AIA) instruments on board the Solar Dynamics Observatory. Propagating disturbances (PDs) are observed everywhere in the polar off-limb regions of the Sun at coronal heights. From these simultaneous observations, we show that the spicules and the PDs may have originated through a common process. From spacetime maps, we find that the start of the trajectory of PDs is almost cotemporal with the time of the rise of the spicular envelope as seen by IRIS slit-jaw images at 2796 and 1400 Å. During the return of spicular material, brightenings are seen in AIA 171 and 193 Å images. The quasi-periodic nature of the spicular activity, as revealed by the IRIS spectral image sequences, and its relation to coronal PDs, as recorded by the coronal AIA channels, suggest that they share a common origin. We propose that reconnection-like processes generate the spicules and waves simultaneously. The waves escape while the cool spicular material falls back.},

  doi          = {10.1088/2041-8205/815/1/L16},

  url          = {https://www.osti.gov/biblio/22518660},
  journal      = {Astrophysical Journal Letters},

  issn         = {2041-8205},

  number       = 1,

  volume       = 815,

  place        = {United States},

  year         = {Thu Dec 10 00:00:00 EST 2015},

  month        = {Thu Dec 10 00:00:00 EST 2015}

}

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