38 citations · 96 across the 17 of their papers we have counts for
20 papers
A study of the kinematic and volumetric co-evolution of Earth-directed CMEs
Ashutosh Pattnaik, Nat Gopalswamy, Ranadeep Sarkar +3
While flare-associated CMEs generally show a strong association between flare X-ray flux and CME kinematics, their volumetric evolution and its link to both kinematics and flare ac…
Radio Signature of Higher Atmospheric Meridional Flow and Implications for Magnetic Trees in the Sun
Srinjana Routh, Anshu Kumari, Rohan Bose +4
The coupling between plasma flows and magnetic fields in the solar atmosphere governs the transport of angular momentum and the redistribution of magnetic flux, yet its manifestati…
The Radio-wave Observations at the Lunar Surface of the photoElectron Sheath (ROLSES) instrument onboard the Intuitive Machines-1 Mission to the Moon
Nat Gopalswamy, Robert J. MacDowall, Pertti A. Mäkelä +15
The Radio wave Observations at the Lunar Surface of the photoElectron Sheath (ROLSES) instrument is a radio telescope system designed to characterize the radio and plasma wave envi…
Propagation Characteristics of the April 21, 2023 CME
Sandeep Kumar, Nandita Srivastava, Parthib Banerjee +1
Accurate estimation of propagation characteristics of coronal mass ejections (CMEs) is crucial for predicting their geoeffectiveness. Stereoscopic techniques to study the kinematic…
The Exospace Weather Frontier
R. O. Parke Loyd, Evgenya L. Shkolnik, Joseph Lazio +26
Space weather is among the most powerful and least understood forces shaping planetary atmospheres. In our Solar System, we observe its effects directly: atmospheric escape, chemic…
Relationship between prominence eruptions and coronal mass ejections during solar cycle 24
Pooja Devi, Nat Gopalswamy, Seiji Yashiro +3
In this article, we present the relationship between prominence eruptions (PEs) and coronal mass ejections (CMEs) from May 2010 to December 2019 covering most of solar cycle 24. We…
On The Influence Of The Solar Wind On The Propagation Of Earth-impacting Coronal Mass Ejections
Sandeep Kumar, Nandita Srivastava, Nat Gopalswamy +1
Coronal Mass Ejections (CMEs) are subject to changes in their direction of propagation, tilt, and other properties as they interact with the variable solar wind. We investigated th…
Solar Energetic Particle Events and Radio Bursts
Nat Gopalswamy
Solar Energetic Particles (SEPs) and radio bursts are indicators of particle acceleration on the Sun and in the heliosphere. The accelerated particles have energies significantly h…
Origins of Very Low Helium Abundance Streams Detected in the Solar Wind Plasma
Yogesh, N. Gopalswamy, D. Chakrabarty +4
The abundance of helium () in the solar wind exhibits variations typically in the range from 2-5% with respect to solar cycle activity and solar wind velocity. However, the…
Exploring the Dynamics of CME-Driven Shocks by Comparing Numerical Modeling and Observations
Meng Jin, Gang Li, Nariaki Nitta +9
Shocks driven by coronal mass ejections (CMEs) are primary drivers of gradual solar energetic particle (SEP) events, posing significant risks to space technology and astronauts. Co…
Implications of the abundance of halo coronal mass ejections for the strength of solar cycle 25
Nat Gopalswamy, Grzegorz Michalek, Seiji Yashiro +3
We assess the relative strength of solar cycle (SC) 25 with respect to SCs 23 and 24 based on the abundance of halo coronal mass ejections (CMEs). We make use of the halo CME datab…
The SOHO LASCO CME Catalog -- Version 2
Nat Gopalswamy, Grzegorz Michałek, Seiji Yashiro +4
This paper provides an update on the coronal mass ejection (CME) catalog maintained at the CDAW Data Center, NASA Goddard Space Flight Center (https://cdaw.gsfc.nasa.gov/CME_list).…
Modelling the magnetic vectors of ICMEs at different heliocentric distances with INFROS
Ranadeep Sarkar, Nandita Srivastava, Nat Gopalswamy +1
The INterplanetary Flux ROpe Simulator (INFROS) is an observationally constrained analytical model dedicated for forecasting the strength of the southward component (Bz) of the mag…
Rotation of a Stealth CME on 2012 October 5 Observed in the Inner Heliosphere
Sandeep Kumar, Dinesha V. Hegde, Nandita Srivastava +3
Coronal Mass Ejections (CMEs) are subject to changes in their direction of propagation, tilt, and other properties. This is because CMEs interact with the ambient solar wind and ot…
Modeling Polarized Radio Sounding Observations of a Coronal Mass Ejection
Elizabeth A. Jensen, Ward B. Manchester, Jason E. Kooi +5
Coronal Mass Ejections (CMEs) evolve significantly as they propagate from the Sun to the Earth, so remote observations of their changes in speed, strength of the magnetic field, de…
Properties of DH Type II Radio Bursts and Their Space Weather Implications
N. Gopalswamy, P. Mäkelä
We report on the properties of type II radio bursts observed by the Radio and Plasma Wave Experiment (WAVES) on board the Wind spacecraft over the past two solar cycles. We confirm…
Prominence eruption initiated by helical kink-instability of an embedded flux rope
P. Vemareddy, N. Gopalswamy, B. Ravindra
We study the triggering mechanism of a limb-prominence eruption and the associated coronal mass ejection near AR 12342 using SDO and LASCO/SOHO observations. The prominence is seen…
Source Regions of the Type II Radio Burst Observed During a CME-CME Interaction on 2013 May 22
P. Mäkelä. N. Gopalswamy, M. J. Reiner, S. Akiyama +1
We report on our study of radio source regions during the type II radio burst on 2013 May 22 based on direction finding (DF) analysis of the Wind/WAVES and STEREO/WAVES (SWAVES) ra…
Multi-wavelength Diagnostics of the Precursor and Main phases of an M1.8 Flare on 2011 April 22
A. K. Awasthi, R. Jain, P. D. Gadhiya +12
We study the temporal, spatial and spectral evolution of the M1.8 flare, which occurred in NOAA AR 11195 (S17E31) on 22 April 2011, and explore the underlying physical processes du…
Maximum Coronal Mass Ejection Speed as an Indicator of Solar and Geomagnetic Activities
A. Kilcik, V. B. Yurchyshyn, V. Abramenko +4
We investigate the relationship between the monthly averaged maximal speeds of coronal mass ejections (CMEs), international sunspot number (ISSN), and the geomagnetic Dst and Ap in…