Results 41 to 50 of about 358 (117)

Weak Solar Radio Bursts from the Solar Wind Acceleration Region Observed by the Parker Solar Probe and Its Probable Emission Mechanism

The Astrophysical Journal
The Parker Solar Probe (PSP) provides us with an unprecedentedly close approach to the observation of the Sun and hence the possibility of directly understanding the elementary process that occurs on the kinetic scale of particles' collective interaction
Ling Chen, Bing Ma, DeJin Wu, Xiaowei Zhou, Marc Pulupa, PeiJin Zhang, Pietro Zucca, Stuart D. Bale, Justin C. Kasper, SuPing Duan   +9 more
doaj   +1 more source

First Detection of Low-frequency Striae in Interplanetary Type III Radio Bursts

The Astrophysical Journal Letters
We report the first detection of type III solar radio burst striae in the 30–80 kHz range, observed by the Cluster-4 spacecraft during an exceptionally quiet solar period.
Vratislav Krupar, Eduard P. Kontar, Jan Soucek, Lynn B. Wilson III, Adam Szabo, Oksana Kruparova, Hamish A. S. Reid, Mychajlo Hajos, David Pisa, Ondrej Santolik, Milan Maksimovic, Jolene S. Pickett   +11 more
doaj   +1 more source

New Insights into Type-I Solar Noise Storms from High Angular Resolution Spectroscopic Imaging with the Upgraded Giant Metrewave Radio Telescope

The Astrophysical Journal
Type-I solar noise storms are perhaps the most commonly observed active radio emissions from the Sun at meter-wavelengths. Noise storms have a long-lived and wideband continuum background with superposed islands of much brighter narrowband and short ...
Surajit Mondal, Devojyoti Kansabanik, Divya Oberoi, Soham Dey   +3 more
doaj   +1 more source

Highly Polarized Type III Storm Observed with Parker Solar Probe

The Astrophysical Journal Letters
The Parker Solar Probe (PSP) spacecraft observed a large coronal mass ejection (CME) on 2022 September 5, shortly before closest approach during the 13th PSP solar encounter.
Marc Pulupa, Stuart D. Bale, Immanuel Christopher Jebaraj, Orlando Romeo, Säm Krucker   +4 more
doaj   +1 more source

Measuring the Magnetic Field of a Coronal Mass Ejection from the Low to Middle Corona

The Astrophysical Journal Letters
A major challenge in understanding the initiation and evolution of coronal mass ejections (CMEs) is measuring the magnetic field of the magnetic flux ropes (MFRs) that drive CMEs.
Xingyao Chen, Bin Chen, Sijie Yu, Surajit Mondal, Muriel Zoë Stiefel, Peijin Zhang, Dale E. Gary, Säm Krucker, Marin M. Anderson, Judd D. Bowman, Ruby Byrne, Morgan Catha, Sherry Chhabra, Larry D’Addario, Ivey Davis, Jayce Dowell, Gregg Hallinan, Charlie Harnach, Greg Hellbourg, Jack Hickish, Rick Hobbs, David Hodge, Mark Hodges, Yuping Huang, Andrea Isella, Daniel C. Jacobs, Ghislain Kemby, John T. Klinefelter, Matthew Kolopanis, Nikita Kosogorov, James Lamb, Casey J. Law, Nivedita Mahesh, Brian O’Donnell, Kathryn Plant, Corey Posner, Travis Powell, Vinand Prayag, Andres Rizo, Andrew Romero-Wolf, Jun Shi, Greg Taylor, Jordan Trim, Mike Virgin, Akshatha Vydula, Sandy Weinreb, David Woody   +46 more
doaj   +1 more source

First Robust Detection of Linear Polarization from Metric Solar Emissions: Challenging Established Paradigms

The Astrophysical Journal Letters
Polarimetric radio observations of the Sun can provide rich information about emission mechanisms and the propagation medium. For the past five decades, solar polarimetric studies at low radio frequencies have almost always assumed the absence of linear ...
Soham Dey, Devojyoti Kansabanik, Divya Oberoi, Surajit Mondal   +3 more
doaj   +1 more source

Magneto-thermal Coupling and Coronal Heating in Solar Active Regions Inferred from Microwave Observations

The Astrophysical Journal
The solar corona is much hotter than the photosphere and chromosphere, but the physical mechanism responsible for heating the coronal plasma remains unidentified. The thermal microwave emission, which is produced in a strong magnetic field above sunspots,
Alexey A. Kuznetsov, Gregory D. Fleishman, Gelu M. Nita, Sergey A. Anfinogentov   +3 more
doaj   +1 more source

A Dedicated System for Coordinated Radio and Optical Monitoring of the Space Weather of Young, Solar-type Stars

The Astrophysical Journal
Low-frequency radio emission in the form of type II and III bursts is a direct indicator of plasma motion in the solar corona and interplanetary medium.
Ivey Davis, Gregg Hallinan, Navtej Saini, Casey Law, Yuping Huang, Rick Burruss, Jeffry Zolkower, John Baker, Curt Corcoran, Carolyn Heffner, Kathryn Plant, Nikita Kosogorov, Marin Anderson, Andrea Isella, Larry D’Addario, Jun Shi, Greg Hellbourg, David Hodge, Sandy Weinreb, Nivedita Mahesh, Ruby Byrne, Jack Hickish, Rick Hobbs, Mike Virgin, Ghislain Kemby, Corey Posner, John T. Klinefelter, Morgan Catha, James Lamb, Mark Hodges, Charlie Harnach, Vinand Prayag, David Woody, Andres Rizo, Andrew Romero-Wolf, Judd D. Bowman, Daniel C. Jacobs, Matthew Kolopanis, Katherine Elder, Akshatha K. Vydula, Dale Gary, Bin Chen, Surajit Mondal, Peijin Zhang, Sijie Yu, Sherry Chhabra, Brian O’Donnell, Jayce Dowell, Greg Taylor   +48 more
doaj   +1 more source

Herringbone Structures during an X-class Eruptive Flare

The Astrophysical Journal
In this paper, we report quasiperiodic herringbone structures during the impulsive phase of an X-class flare, coinciding with the distinct acceleration phase of eruptive prominence ejection on 2023 December 31.
Qingmin Zhang, Zongjun Ning, Xingyao Chen, Wei Chen, Xiaoli Yan, Shuyue Li   +5 more
doaj   +1 more source

Microwave Bright Points with Multiple Periodic Oscillations in the Solar Polar Coronal Hole during Solar Cycle Minimum

The Astrophysical Journal
During solar cycle minimum, polar coronal holes show a prominent radio brightening cap. The analysis of polar microwave enhanced radiation in polar coronal holes is helpful for understanding the magnetic field characteristics and the origin of the solar ...
Jing Huang, Satoshi Masuda, Baolin Tan, Yin Zhang, Shangbin Yang, Shuhong Yang, Yuanyong Deng   +6 more
doaj   +1 more source