Results 31 to 40 of about 20,265 (219)

What Determines Solar Flares Producing Interplanetary Type III Radio Bursts? [PDF]

open access: yesThe Astrophysical Journal Letters, 2020
Abstract Energetic electrons accelerated by solar flares often give rise to type III radio bursts at a broad wave band and even interplanetary type III bursts (IT3) if the wavelength extends to a decameter–kilometer. In this Letter, we investigate the probability of the flares that produce IT3, based on the sample of 2272 flares above M ...
Y. K. Kou   +6 more
openaire   +3 more sources

Survey on solar X-ray flares and associated coherent radio emissions

open access: yes, 2004
The radio emission during 201 X-ray selected solar flares was surveyed from 100 MHz to 4 GHz with the Phoenix-2 spectrometer of ETH Zurich. The selection includes all RHESSI flares larger than C5.0 jointly observed from launch until June 30, 2003 ...
A. O. Benz   +39 more
core   +1 more source

Was an Outburst of Aquila X-1 a Magnetic Flare?

open access: yes, 2010
I point to an interesting similarity in the radio and the soft X-ray light curves between the November 2009 outburst of the X-ray binary Aquila X-1 and some solar flares.
Benz   +19 more
core   +1 more source

Comparative Analysis of Type III Radio Bursts and Solar Flares: Spatial Localization and Correlation with Solar Flare Intensity

open access: yesThe Astrophysical Journal
We present a comprehensive study of type III radio bursts and their association with solar flares of magnitude M1.0 and larger, as observed by four widely separated spacecraft (Parker Solar Probe, Solar Orbiter, STEREO-A, and Wind). Our main focus is the
Vratislav Krupar   +10 more
doaj   +1 more source

Type III Radio Burst Productivity of Solar Flares [PDF]

open access: yesInternational Astronomical Union Colloquium, 1989
We study the statistical relationship between optical flares and type III radio bursts, using modern and extensive computer files. Results emerge along two main lines, concerning the physical mechanism of ejection of energetic particles, and the magnetic field geometry respectively.First, we find that type III probability of occurrence increases ...
M. Poquerusse, P.S. McIntosh
openaire   +1 more source

A Statistical Analysis of the Solar Phenomena Associated with Global EUV Waves [PDF]

open access: yes, 2017
Solar eruptions are the most spectacular events in our solar system and are associated with many different signatures of energy release including solar flares, coronal mass ejections, global waves, radio emission and accelerated particles. Here, we apply
Carley, Eoin P.   +4 more
core   +2 more sources

Searching for Rotational X‐Ray Modulation on TIC 277539431

open access: yesAstronomische Nachrichten, EarlyView.
ABSTRACT TIC 277539431, a fast rotating M7 dwarf, was detected to host the highest latitude flare to date at 81°$$ {81}^{{}^{\circ}} $$. Magnetic activity like stellar flares occurring at high latitude indicate occurrence of coronal loops at these latitudes on fully‐convective M dwarfs. In contrast, sunspots usually occur below 30°$$ {30}^{{}^{\circ}} $
Desmond Dsouza   +2 more
wiley   +1 more source

Signal Strength of VLF Radio Wave Measured at Syowa Station in Antarctica

open access: yesAntarctic Record, 1976
The measurement of NAA-17.8 kHz signal strength was made at Syowa Station, Antarctica, for one year from February 1970 to January 1971. The diurnal and seasonal variations of the signal strength are shown.
Toshirou SAKAMOTO, Isao SHIRO
doaj   +1 more source

Fractal Reconnection in Solar and Stellar Environments

open access: yes, 2016
Recent space based observations of the Sun revealed that magnetic reconnection is ubiquitous in the solar atmosphere, ranging from small scale reconnection (observed as nanoflares) to large scale one (observed as long duration flares or giant arcades ...
A. Asai   +110 more
core   +1 more source

Why Autonomous Vehicles Are Not Ready Yet: A Multi‐Disciplinary Review of Problems, Attempted Solutions, and Future Directions

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT Personal autonomous vehicles can sense their surrounding environment, plan their route, and drive with little or no involvement of human drivers. Despite the latest technological advancements and the hopeful announcements made by leading entrepreneurs, to date no personal vehicle is approved for road circulation in a “fully” or “semi ...
Xingshuai Dong   +13 more
wiley   +1 more source

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