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Browsing by Author "Joshi, Jayant"

Browsing by Author "Joshi, Jayant"

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  • Data processing of visible emission line coronagraph onboard ADITYA-L1 
    Priyal, M; Singh, J; Prasad, B. R; Sumana, Chavali; Kumar, Varun; Mishra, Shalabh; Venkata, S. N; Sindhuja, G; Sasikumar Raja, K; Amit Kumar; Krishnan, Sanal; Hegde, Bhavana; Utkarsha, D; Natarajan, V; Somasundaram, P. K; Nagabhushana, S; Kamath, P. U; Kathiravan, S; Mani, V. T; Basavaraju, Suresh; Chavan, Rajkumar; Vemareddy, P; Ravindra, B; Rajaguru, S. P; Nagaraju, K; Mishra, Wageesh; Joshi, Jayant; Samanta, T; Chatterjee, Piyali; Kathiravan, C; Ramesh, R (Elsevier B.V, 2024-07-01)
    ADITYA-L1 is India's first dedicated mission to observe the Sun and its atmosphere from a halo orbit around L1 point. Visible emission line coronagraph (VELC) is the primary payload on board Aditya-L1 to observe the Sun’s ...
  • Do Hα Stokes V Profiles Probe the Chromospheric Magnetic Field? An Observational Perspective 
    Mathur, Harsh; Nagaraju, K; Joshi, Jayant; de la Cruz Rodriguez, Jaime (American Astronomical Society, 2023-03-20)
    We investigated the diagnostic potential of the Stokes V profile of the Hα line to probe the chromospheric line-ofsight (LOS) magnetic field (BLOS) by comparing the BLOS inferred from the weak field approximation (WFA) ...
  • Intensity and velocity oscillations in a flaring active region 
    Millar, David C. L; Fletcher, Lyndsay; Joshi, Jayant (Oxford University Press on behalf of Royal Astronomical Society, 2024-01)
    Chromospheric oscillations can give us insight into the physical environment in the solar atmosphere, both in quiet Sun and flaring conditions. Many authors have reported increases in the prevalence of 3-minute oscillations ...
  • Magnetic topology of quiet-Sun Ellerman bombs and associated ultraviolet brightenings 
    Bhatnagar, Aditi; Avijeet Prasad; Rouppe van der Voort, L; Nobrega-Siverio, Daniel; Joshi, Jayant (EDP Sciences, 2025-01)
    Context. Quiet-Sun Ellerman bombs (QSEBs) are small-scale magnetic reconnection events in the lower atmosphere of the quiet Sun. Recent work has shown that a small percentage of them can occur co-spatially and co-temporally ...
  • Observations of magnetic reconnection in the deep solar atmosphere in the Hε line 
    van der Voort, Luc Rouppe, H. M; Joshi, Jayant; Krikova, Kilian (EDP Sciences, 2024-03)
    Context. Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon known as Ellerman bombs (EBs). It is most common to observe EBs in the Hα and Hβ ...
  • On the million-degree signature of spicules 
    Bose, Souvik; Joshi, Jayant; Testa, Paola; Pontieu, Bart De (American Astronomical Society, 2025-04-10)
    Spicules have often been proposed as substantial contributors toward the mass and energy balance of the solar corona. While their transition region (TR) counterpart has unequivocally been established over the past decade, ...
  • Properties of shock waves in the quiet-Sun chromosphere 
    Mathur, Harsh; Joshi, Jayant; Nagaraju, K; van der Voort, Luc Rouppe; Bose, Souvik (EDP Sciences, 2022-12)
    Context. Short-lived (100 s or less), sub-arcsec to a couple of arcsec sized features of enhanced brightenings in the narrowband images at the H2V and K2V positions of the Ca ii H&K lines in the quiet Sun are known as ...
  • Properties of ubiquitous magnetic reconnection events in the lower solar atmosphere 
    Joshi, Jayant; van der Voort, Luc Rouppe, H. M (EDP Sciences, 2022-08)
    Context. Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. Recent high-quality Hβ observations indicate that ...
  • Quiet Sun Ellerman bombs as a possible proxy for reconnection-driven spicules 
    Sand, Mats Ola; van der Voort, Luc Rouppe; Joshi, Jayant; Bose, Souvik; Nobrega-Siverio, Daniel; Grinon-Marin, Ana Belen (EDP Sciences, 2025-05)
    Context. Spicules are elongated, jet-like structures that populate the solar chromosphere and are rooted in the lower solar atmosphere. In recent years, high-resolution observations and advanced numerical simulations have ...
  • Simultaneous Spectropolarimetric Observations in the Hα and Ca II 8662Å Lines of an Active Region 
    Mathur, Harsh; Nagaraju, K; Yadav, Rahul; Joshi, Jayant (American Astronomical Society, 2024-08-10)
    We present spectropolarimetric observations of an active region recorded simultaneously in the Hα and the Ca II 8662 Å lines. The sunspot exhibits multiple structures, including a light bridge and a region where the Ca ...
  • Transition region brightening in a moss region and their relation with lower atmospheric dynamics 
    Ram, Bhinva; Samanta, T; Chen, Yajie; Sterling, Alphonse C; Joshi, Jayant; Yurchyshyn, Vasyl; Chitta, L. P; Pant, Vaibhav (American Astronomical Society, 2024-12-10)
    Small-scale brightenings (SBs) are commonly observed in the transition region (TR) that separates the solar chromosphere from the corona. These brightenings, omnipresent in active region patches known as "moss" regions, ...
  • Transition region response to quiet-Sun Ellerman bombs 
    Bhatnagar, Aditi; van der Voort, Luc Rouppe; Joshi, Jayant (EDP Sciences, 2024-09)
    Context. Quiet-Sun Ellerman bombs (QSEBs) are key indicators of small-scale photospheric magnetic reconnection events. Recent high-resolution observations have shown that they are ubiquitous and that large numbers of QSEBs ...
  • Unveiling the dynamics and genesis of small-scale fine-structure loops in the lower solar atmosphere 
    Bura, Annu; Samanta, T; Sterling, Alphonse C; Chen, Yajie; Joshi, Jayant; Yurchyshyn, Vasyl; Moore, Ronald L (American Astronomical Society, 2025-04-20)
    Recent high-resolution solar observations have unveiled the presence of small-scale loop-like structures in the lower solar atmosphere, often referred to as unresolved fine structures, low-lying loops, and miniature hot ...

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