25 citations · 103 across the 18 of their papers we have counts for
18 papers
Multi-thermal dynamics and transverse oscillations of solar spicules revealed by coordinated SST, IRIS, and SDO observations
Ravi Chaurasiya, Tiago M. D. Pereira, A. Raja Bayanna
% context heading (optional) {Solar spicules are highly dynamic chromospheric jets that play an important role in the mass and energy balance of the solar atmosphere, though their…
Comparative Analysis of Ellerman and Quiet Sun Ellerman Bombs in the Solar Atmosphere
Ravi Chaurasiya, Ankala Raja Bayanna, Jayant Joshi
Ellerman Bombs (EBs) and Quiet-Sun Ellerman Bombs (QSEBs) are small-scale signatures of magnetic reconnection in the lower solar atmosphere, observed in active regions and quiet-Su…
On the Relationship between Solar Spicules and Propagating Coronal Disturbances: The Role of Shocks
Ravi Chaurasiya, Sankalp Srivastava, Piyali Chatterjee +3
Spicules and propagating coronal disturbances (PCDs) are ubiquitous dynamic features of the solar atmosphere, yet their physical connection remains an open question of paramount im…
Propagation and Energy Dissipation of Shock Waves in the Solar Chromosphere
Ravi Chaurasiya, 1 Ankala Raja Bayanna, 1 Robertus Erdélyi
The solar atmosphere is permeated by various types of waves that originate from subsurface convection. As these waves propagate upward, they encounter they encounter a steep decrea…
Test and Calibration of the Solar Ultraviolet Imaging Telescope (SUIT) on board Aditya-L1
Janmejoy Sarkar, VN Nived, Soumya Roy +52
The Solar Ultraviolet Imaging Telescope (SUIT) on board the AdityaL1 mission observes the Sun in the 200-400 nm wavelength range. This paper presents the results of various on grou…
Observational Study of the Atmospheric Gravity Waves in the lower Solar Atmosphere
Ravi Chaurasiya, Ankala Raja Bayanna
The solar chromosphere exhibits a variety of waves originating from the photosphere and deeper layers, causing oscillations at different heights with distinct frequencies. This stu…
On the Response of the Transition Region and the Corona to Rapid Excursions in the Chromosphere
Ravi Chaurasiya, Ankala Raja Bayanna, R. E. Louis +2
Spicules are the thin hair/grass-like structures that are prominently observed at the chromospheric solar limb. It is believed that fibrils and rapid blueshifted and redshifted exc…
Investigation of Phase Shift and Travel Time of Acoustic Waves in the Lower Solar Atmosphere Using Multi-Height Velocities
Hirdesh Kumar, Brajesh Kumar, Shibu K. Mathew +2
We report and discuss phase-shift and phase travel time of low-frequency (ν < 5.0 mHz) acoustic waves estimated within the photosphere and photosphere-chromosphere interface region…
Classification of circular polarization Stokes profiles in a sunspot using k-means clustering
Rohan Eugene Louis, Shibu K. Mathew, A. Raja Bayanna
The magnetic and velocity fields in sunspots are highly structured on small spatial scales which are encoded in the Stokes profiles. Our aim is to identify Stokes profiles in a sun…
A study of the propagation of magnetoacoustic waves in small-scale magnetic fields using solar photospheric and chromospheric Dopplergrams: HMI/SDO and MAST observations
Hirdesh Kumar, Brajesh Kumar, S. P. Rajaguru +2
In this work, we present a study of the propagation of low-frequency magneto-acoustic waves into the solar chromosphere within small-scale inclined magnetic fields over a quiet-mag…
Sustained heating of the chromosphere and transition region over a sunspot light bridge
Rohan E. Louis, Shibu K. Mathew, A. Raja Bayanna +2
Sunspot light bridges (LBs) exhibit a wide range of short-lived phenomena in the chromosphere and transition region. In contrast, we use here data from the Multi-Application Solar…
Design of an adaptable Stokes polarimeter for exploring chromospheric magnetism
Rohan E. Louis, A. Raja Bayanna, Hector Socas Navarro
The chromosphere is a highly complex and dynamic layer of the Sun, that serves as a conduit for mass and energy supply between two, very distinct regions of the solar atmosphere, n…
Imaging Spectropolarimeter for Multi-application Solar Telescope at Udaipur Solar Observatory: Characterization of polarimeter and preliminary observations
Alok Ranjan Tiwary, Shibu K. Mathew, A. Raja Bayanna +2
Multi-Application Solar Telescope (MAST) is a 50 cm off-axis Gregorian telescope and started operational recently at Udaipur Solar Observatory (USO). For understanding the evolutio…
Analysis of sudden variations in photospheric magnetic fields during a large flare and their influences in the solar atmosphere
Brajesh Kumar, A. Raja Bayanna, P. Venkatakrishnan +1
The solar active region NOAA 11719 produced a large two-ribbon flare on 11 April 2013. We have investigated the sudden variations in the photospheric magnetic fields in this active…
Membrane based Deformable Mirror: Intrinsic aberrations and alignment issues
A. Raja Bayanna, Rohan E. Louis, S. Chatterjee +2
A Deformable Mirror (DM) is an important component of an Adaptive Optics system. It is known that an on-axis spherical/parabolic optical component, placed at an angle to the incide…
Narrow-Band Imaging System for the Multi-application Solar Telescope at Udaipur Solar Observatory: Characterization of Lithium Niobate Etalons
A. Raja Bayanna, Shibu K. Mathew, P. Venkatakrishnan +1
Multi-application Solar Telescope is a 50 cm off-axis Gregorian telescope that has been installed at the lake site of Udaipur Solar Observatory. For quasi-simultaneous photospheric…
On the line profile changes observed during the X2.2 class flare in the active region NOAA 11158
A. Raja Bayanna, Brajesh Kumar, P. Venkatakrishnan +4
The solar active region NOAA 11158 produced a series of flares during its passage through the solar disk. The first major flare (of class X2.2) of the current solar cycle occurred…
Properties of Umbral Dots from Stray Light Corrected Hinode Filtergrams
Rohan E. Louis, Shibu K. Mathew, Luis R. Bellot Rubio +3
High resolution blue continuum filtergrams from Hinode are employed to study the umbral fine structure of a regular unipolar sunspot. The removal of scattered light from the images…