Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.621 IF 1.621
  • IF 5-year value: 1.614 IF 5-year
    1.614
  • CiteScore value: 1.61 CiteScore
    1.61
  • SNIP value: 0.900 SNIP 0.900
  • SJR value: 0.910 SJR 0.910
  • IPP value: 1.58 IPP 1.58
  • h5-index value: 24 h5-index 24
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 80 Scimago H
    index 80
Discussion papers
https://doi.org/10.5194/angeo-2019-66
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-66
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 09 May 2019

Regular paper | 09 May 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

Signatures of red-shifted footpoints in the quiescent coronal loop system

Yamini K. Rao1, Abhishek K. Srivastava1, Pradeep Kayshap2, and Bhola N. Dwivedi1 Yamini K. Rao et al.
  • 1Department of Physics, Indian Institute of Technology (BHU), Varanasi-221005, India
  • 2Institute of Physics, University of South Bohemia, Branišovská 1760, CZ – 370 05 České Budějovice, Czech Republic

Abstract. We observed quiescent coronal loops using multi-wavelength observations from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) on 2016 April 13. The flows at the footpoints of such loop systems are studied using spectral data from Interface Region Imaging Spectrograph (IRIS). The Doppler velocity distributions at the footpoints lying in the moss region show the negligible or small flows at Ni I, Mg II k3 and C II line corresponding to upper photospheric and chromospheric emissions. Significant red-shifts (downflows) ranging from (1 to 7) km s−1 are observed at Si IV (1393.78 Å; log(T/K) = 4.8) which is found to be consistent with the existing results regarding dynamical loop systems and moss regions. Such downflows agree well with the impulsive heating mechanism reported earlier.

Yamini K. Rao et al.
Interactive discussion
Status: open (until 20 Jun 2019)
Status: open (until 20 Jun 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Yamini K. Rao et al.
Yamini K. Rao et al.
Viewed  
Total article views: 67 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
55 11 1 67 0 0
  • HTML: 55
  • PDF: 11
  • XML: 1
  • Total: 67
  • BibTeX: 0
  • EndNote: 0
Views and downloads (calculated since 09 May 2019)
Cumulative views and downloads (calculated since 09 May 2019)
Viewed (geographical distribution)  
Total article views: 62 (including HTML, PDF, and XML) Thereof 61 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 19 May 2019
Publications Copernicus
Download
Short summary
Chromospheric flows are of significant importance to understand the mechanisms of transfer of plasma and energy from lower atmosphere of the Sun to the corona through transition region. We study the quiescent loop system in terms of Doppler velocities at the footpoints of individual loop strands to understand the heating mechanisms driving plasma flows in such loop system.
Chromospheric flows are of significant importance to understand the mechanisms of transfer of...
Citation