Search

Search Results

1. Linear Polarization of the Helium D₃ Line by Accelerated Protons in the Solar Chromosphere

   Abstract

   In the article, we have studied the impact linear polarization of the helium D ₃ line that takes place in the solar chromosphere under the...

   M. B. Shapochkin, S. A. Bogachev in Astronomy Reports

   Article 01 February 2024
   

2. Monochromatic Two-Fluid Alfvén Waves in the Partially Ionised Solar Chromosphere

   We present new results towards the explanation of the chromospheric-heating problem and the solar-wind origin, using a two-fluid model that takes...

   J. Kraskiewicz, K. Murawski, ... S. Poedts in Solar Physics

   Article Open access 17 January 2023
   

3. Solar mean magnetic field of the chromosphere

   The Solar Mean Magnetic Field (SMMF) is the mean value of the line-of-sight (LOS) component of the solar vector magnetic field averaged over the...

   M. Vishnu, K. Nagaraju, Harsh Mathur in Journal of Astrophysics and Astronomy

   Article 09 June 2023
   

4. CASPER: A mission to study the time-dependent evolution of the magnetic solar chromosphere and transition regions

   Our knowledge about the solar chromosphere and transition region (TR) has increased in the last decade thanks to the huge scientific return of...

   D. Orozco Suárez, J. C. del Toro Iniesta, ... T. del Pino Alemán in Experimental Astronomy

   Article Open access 24 March 2022
   

5. Guided Oscillations in Partially Ionised Solar Chromosphere Driven by a Spectrum of Waves

   Partial ionised solar plasma has received recently more attention as several processes in the solar atmosphere could not be explained by assuming a...

   A. Alharbi in Brazilian Journal of Physics

   Article 05 January 2024
   

6. Analysis of the Solar Flare Index for Solar Cycles 18 – 24: Extremely Deep Gnevyshev Gap in the Chromosphere

   We study the solar flare index (SFI) for the Solar Cycles 18 – 24. We find that SFI has deeper Gnevyshev gap (GG) in its first principal component...

   Jouni Takalo in Solar Physics

   Article Open access 07 July 2023
   

7. Physical Processes in the Lower Chromosphere of the Sun

   Abstract

   A specificity of the boundary between the photosphere and the chromosphere of the Sun consists in considerable acceleration of plasma...

   I. A. Molotkov, N. A. Ryabova in Plasma Physics Reports

   Article 27 July 2020

8. Height-dependent differential rotation of the solar atmosphere detected by CHASE

   Rotation is an intrinsic property of stars and provides essential constraints on their structure, formation, evolution and interaction with the...

   Shihao Rao, Chuan Li, ... Yuan Yuan in Nature Astronomy

   Article 13 June 2024
   

9. The Effect of Horizontal Density-Inhomogeneity on Spicules Driven by Vertical Velocity Pulses

   Observations have shown that the chromosphere networks are rich in features with density higher than the ambient atmosphere. To investigate the...

   Chao Zhang, Zhenghua Huang, ... Hengyuan Wei in Solar Physics

   Article 23 April 2024
   

10. Waves propagation in network and inter-network bright points channels between the chromosphere and transition regions with IRIS observations

    The significance increase of the plasma temperature from the solar photosphere to the corona up to 1MK is still unresolved. One of the candidates for...

    Sima Zeighami, Ehsan Tavabi, Elnaz Amirkhanlou in Journal of Astrophysics and Astronomy

    Article 02 July 2020
    

11. Chromospheric and coronal heating in an active region plage by dissipation of currents from braiding

    The question of what heats the outer solar atmosphere remains one of the longstanding mysteries in astrophysics. Statistical studies of Sun-like...

    Souvik Bose, Bart De Pontieu, ... Amy Winebarger in Nature Astronomy

    Article Open access 15 April 2024
    

12. Differential Rotation of Solar Filaments Early Observed by the OGAUC in the Period 1929 – 1941

    The solar filaments obtained from the daily Ca  ii K3 observations at the Coimbra Astronomical Observatory, which is now called the Geophysical and...

    Miao Wan, Kejun Li in Solar Physics

    Article 28 September 2022
    

13. Spectral Study of the Active Region with the Ellerman Bomb and Hα Surges. Chromosphere. Ellerman Bomb

    Abstract—

    The results from the analysis of spectral observations in the Hα line of the active region (AR) NOAA 11024, in which the Ellerman bomb (EB)...

    M. N. Pasechnik in Kinematics and Physics of Celestial Bodies

    Article 01 January 2021
    

14. The New Composite Solar Flare Index from Solar Cycle 17 to Cycle 24 (1937 – 2020)

    The chromosphere is a highly dynamic outer plasma layer of the Sun. Its physical processes accounting for the variability are poorly understood. We...

    Victor Manuel Velasco Herrera, Willie Soon, ... Giovanni Pietro Gregori in Solar Physics

    Article 22 August 2022
    

15. Simulation of the April 27, 2012 Flare Emission in the Spectral Lines of Hydrogen, Helium, and Calcium

    Abstract

    The paper presents the results of the analysis of the sloar flare SOL2012-04-27 emission in hydrogen, helium, and calcium spectral lines...

    Yu. A. Kupryakov, K. V. Bychkov, ... A. B. Gorshkov in Moscow University Physics Bulletin

    Article 01 April 2024
    

16. Two-fluid numerical model of chromospheric heating and plasma outflows in a quiet-Sun

    Purpose

    This paper addresses long-standing solar physics problems, namely, the heating of the solar chromosphere and the origin of the solar wind. Our...

    K. Murawski, Z. E. Musielak, ... L. Kadowaki in Astrophysics and Space Science

    Article 23 November 2022
    

17. Time-Dependent Two-Fluid Magnetohydrodynamic Model and Simulation of the Chromosphere

    The Sun’s chromosphere is a highly dynamic, partially ionized region where spicules (hot jets of plasma) form. Here we present a two-fluid MHD model...

    Qusai Al Shidi, Ofer Cohen, ... Jiannan Tu in Solar Physics

    Article 18 September 2019
    

18. Magneto-Hydrodynamics

    To proceed beyond the basic inferences of Chap. 1 , we will not only need a representative thermodynamic...

    Philip Judge, James A. Ionson in The Problem of Coronal Heating

    Chapter 2024
    

19. Small-Scale Upflows in a Coronal Hole – Tracked from the Photosphere to the Corona

    Coronal transients are known as sources of coronal upflows. With the commissioning of Solar Orbiter, it became apparent that coronal small-scale...

    Conrad Schwanitz, Louise Harra, ... Nour E. Raouafi in Solar Physics

    Article Open access 10 November 2023
    

20. Linear Polarization of Radiation in the 5876 Å (D3) and 5015 Å He I Lines in the Solar Atmosphere

    Abstract

    In this paper, we theoretically study the linear polarization of radiation that arises in the lines of atomic helium in the solar...

    S. A. Bogachev, M. B. Shapochkin in Astronomy Reports

    Article 01 December 2022