Browsing Department of Physics by Author "Srivastava, Abhishek K."

Browsing Department of Physics by Author "Srivastava, Abhishek K."

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  • CONFINED PARTIAL FILAMENT ERUPTION AND ITS REFORMATION WITHIN A STABLE MAGNETIC FLUX ROPE 
    Joshi, Navin Chandra; Srivastava, Abhishek K.; Filippov, Boris; and et. al. (Institute of Physics Publishing, 2014-04-29)
    We present observations of a confined partial eruption of a filament on 2012 August 4, which restores its initial shape within ≈2 hr after eruption. From the Global Oscillation Network Group Hα observations, we find that ...
  • The Extended Solar Cycle: Muddying the Waters of Solar/Stellar Dynamo Modeling or Providing Crucial Observational Constraints? 
    Srivastava, Abhishek K.; McIntosh, Scott W.; Arge, N.; Banerjee, Dipankar; Dikpati, Mausumi; Dwivedi, Bhola N.; Guhathakurta, Madhulika; Karak, B.B.; Leamon, Robert J.; Matthew, Shibu K.; Munoz-Jaramillo, Andres; Nandy, D.; Norton, Aimee; Upton, L.; Chatterjee, S.; Mazumder, Rakesh; Rao, Yamini K.; Yadav, Rahul (Frontiers Media S.A., 2018-11-22)
    In 1844 Schwabe discovered that the number of sunspots increased and decreased over a period of about 11 years, that variation became known as the sunspot cycle. Almost eighty years later, Hale described the nature of the ...
  • Numerical Simulations of the Decaying Transverse Oscillations in the Cool Jet 
    Srivastava, Abhishek K.; Singh, Balveer (Multidisciplinary Digital Publishing Institute (MDPI), 2023-06-25)
    In the present paper, we describe a 2.5D (two-and-a-half-dimensional) magnetohydrodynamic (MHD) simulation that provides a detailed picture of the evolution of cool jets triggered by initial vertical velocity perturbations ...
  • On modelling the kinematics and evolutionary properties of pressure-pulse-driven impulsive solar jets 
    Singh, Balveer; Sharma, Kushagra; Srivastava, Abhishek K. (Copernicus GmbH, 2019-09-24)
    In this paper, we describe the kinematical and evolutionary properties of the impulsive cool jets in the solar atmosphere using numerical simulation by Godunovtype PLUTO code at two different quiet-Sun magnetic field ...
  • Reconnection-generated Plasma Flows in the Quasi-separatrix Layer in Localized Solar Corona 
    Mondal, Sripan; Srivastava, Abhishek K.; Mishra, Sudheer K.; Sangal, K; Kayshap, Pradeep; Guo, Yang; Pontin, David I; Uritsky, Vadim M.; Ofman, Leon; Wang, Tongjiang (Institute of Physics, 2023-08-04)
    Multiwavelength observations of the propagating disturbances (PDs), discovered by Atmospheric Imaging Assembly (AIA) on board Solar Dynamics Observatory (SDO), are analyzed to determine their driving mechanism and physical ...
  • Signatures of red-shifted foot points in the quiescent coronal loop system 
    Rao, Yamini K.; Srivastava, Abhishek K.; Kayshap, Pradeep; Dwived, Bhola N. (Copernicus GmbH, 2019-08-30)
    We observed quiescent coronal loops using multiwavelength observations from the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory (SDO) on 13 April 2016. The flows at the foot points of such loop ...
  • Superpenumbral chromospheric flare 
    Srivastava, Abhishek K.; Dwivedi, Bhola Nath; Choudhary, Debiprasad P.; Zhang, Hong-Qi; Liu, Suo (Institute of Physics Publishing, 2018-10)
    We observed a C-class flare at the outer boundary of the superpenumbra of a sunspot. The flare was triggered by an emerging magnetic bipolar region that was obliquely oriented with respect to the superpenumbral fibrils. ...
  • Transverse oscillations and an energy source in a strongly magnetized sunspot 
    Yuan, Ding; Fu, Libo; Cao, Wenda; Kuźma, Błażej; Geeraerts, Michaël; Trelles Arjona, Juan C.; Murawski, Kris; Van Doorsselaere, Tom; Srivastava, Abhishek K.; Miao, Yuhu; Feng, Song; Feng, Xueshang (Nature Research, 2023-05-25)
    The solar corona is two to three orders of magnitude hotter than the underlying photosphere, and the energy loss of coronal plasma is extremely strong, requiring a heating flux of over 1,000 W m −2 to maintain its high ...

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