scholarly journals Performance of Major Flare Watches from the Max Millennium Program (2001 – 2010)

Solar Physics ◽  
2016 ◽  
Vol 291 (2) ◽  
pp. 411-427 ◽  
Author(s):  
D. S. Bloomfield ◽  
P. T. Gallagher ◽  
W. H. Marquette ◽  
R. O. Milligan ◽  
R. C. Canfield
Keyword(s):  
Major Flare

Response of the Solar Five-Minute Oscillations to a Major Flare

1988 ◽  
pp. 59-62 ◽  
Author(s):  
Deborah A. Haber ◽  
Juri Toomre ◽  
Frank Hill
Keyword(s):  
Major Flare

scholarly journals Water Masers Outburst in the Massive Stellar Cluster W49A

2015 ◽  
Vol 12 (S316) ◽  
pp. 155-156
Author(s):  
Busaba H. Kramer ◽  
Karl M. Menten ◽  
Tomasz Kamiński ◽  
Bo Zhang ◽  
Nimesh A. Patel ◽  
...  
Keyword(s):  
Stellar Cluster ◽  
Star Forming ◽  
Physical Conditions ◽  
Long Baseline ◽  
Major Flare ◽  
Multi Wavelength ◽  
Remarkable Result ◽  
Water Masers ◽  
Very Long Baseline Array ◽  
Very High

AbstractWe report a multi-wavelength study of a recent major flare (~ 80,000 Jy at VLSR ~ -98.1 km s−1) of the 22-GHz water maser in W49A. In February 2014, we started monthly monitoring with the Effelsberg 100-m radio telescope. In May 2014, we carried out the nearly simultaneous observations of the 22-GHz transition with selected submillimeter water transitions using the IRAM 30-m telescope (at 183 GHz) and the Atacama Pathfinder Experiment (APEX) 12-m telescope (from 321 to 475 GHz). We have also performed interferometric observations using the NRAO Very Long Baseline Array (VLBA) at 22 GHz and the Submillimeter Array (SMA) at 321 and 325 GHz. One remarkable result is the detection of very high velocity emission features in several transitions. Our data also represent its first detection of the 475-GHz water transition in a star-forming region. Studying these multiple masing transitions in conjunction with theoretical modeling of their excitation not only places strong constraints on the physical conditions of the masing gas but also allows us to study their association with the embedded massive stellar cluster in W49A.

scholarly journals Multifrequency Observations of Blazars

1987 ◽  
Vol 121 ◽  
pp. 317-323
Author(s):  
E I Robson ◽  
W K Gear ◽  
L M J Brown
Keyword(s):  
Good Description ◽  
Infrared Region ◽  
Separate Component ◽  
New Model ◽  
Major Flare ◽  
Spectral Behaviour

This paper reports the results of a programme of multifrequency observations of a sample of Blazars concentrating particularly on the millimetre through infrared region. Our observations have demonstrated the need for a new model to explain the spectral behaviour of a major flare in 3C273. This also provides a good description of the variability exhibited by Blazars. We have also shown that the radio through mid-IR synchrotron spectrum of 3C273 is a separate component from the optical/IR.

Laying Blame for Flight and Fight: Sino-Soviet Relations and the “Yi–Ta” Incident in Xinjiang, 1962

2019 ◽  
Vol 238 ◽  
pp. 504-523
Author(s):  
Charles Kraus
Keyword(s):  
Foreign Policy ◽  
Soviet Union ◽  
Chinese Foreign Policy ◽  
Russian Language ◽  
Chinese Government ◽  
Northern Xinjiang ◽  
The Soviet Union ◽  
Major Flare ◽  
Party State

AbstractIn spring 1962, 60,000 individuals fled from northern Xinjiang into the Soviet Union. Known as the “Yi–Ta” incident, the mass exodus sparked a major flare up in Sino-Soviet relations. This article draws on declassified Chinese and Russian-language archival sources and provides one of the first in-depth interpretations of the event and its aftermath. It argues that although the Chinese government blamed the Soviet Union for the Yi-Ta incident, leaders in Beijing and Xinjiang also recognized the domestic roots of the disturbance, such as serious material deficits in northern Xinjiang and tensions between minority peoples and the party-state. The Chinese government's diplomatic sparring with Moscow over the mass exodus reflected Mao Zedong's continued influence on Chinese foreign policy, despite claims by scholars that Mao had retreated from policymaking during this period.

scholarly journals Nonlinear Force‐free Field Modeling of a Solar Active Region around the Time of a Major Flare and Coronal Mass Ejection

2008 ◽  
Vol 675 (2) ◽  
pp. 1637-1644 ◽  
Author(s):  
C. J. Schrijver ◽  
M. L. DeRosa ◽  
T. Metcalf ◽  
G. Barnes ◽  
B. Lites ◽  
...  
Keyword(s):  
Active Region ◽  
Coronal Mass Ejection ◽  
Free Field ◽  
Solar Active Region ◽  
Field Modeling ◽  
Major Flare ◽  
Nonlinear Force ◽  
Mass Ejection ◽  
Force Free Field

Imaging observations of the evolution of meter-decameter burst emission during a major flare

Solar Physics ◽  
1987 ◽  
Vol 111 (2) ◽  
pp. 347-363 ◽  
Author(s):  
N. Gopalswamy ◽  
M. R. Kundu
Keyword(s):  
Major Flare ◽  
Burst Emission

scholarly journals Eruption of a Twisted Filament and Associated Phenomena

1998 ◽  
Vol 167 ◽  
pp. 338-341
Author(s):  
Wahab Uddin ◽  
V.K. Verma
Keyword(s):  
Solar Flare ◽  
Geomagnetic Storms ◽  
Magnetic Energy ◽  
Radio Bursts ◽  
X Ray ◽  
Filament System ◽  
Long Duration ◽  
Major Flare ◽  
Ccd Observations ◽  
Microwave Bursts

AbstractIn this paper we present CCD observations between February 14–20, 1994 and analysis of the giant twisted filament evolved in the active region NOAA 7671. The dynamic eruption of the filament was accompanied by a major flare (3B/M4), CME, long duration type II, IV radio bursts, great microwave bursts, a long duration soft X-ray burst, SIDs, strong geomagnetic storms and a very energetic proton flare. We analysed and estimated the twist, length, volume, mass and energy associated with filament system between February 14 and 20, 1994. The present study shows that the magnetic energy required for the solar flare came from the filament system associated with the solar flare and associated phenomena.

scholarly journals Solar Gamma Rays and their Correlation with Space and Ground-Based Observations

1968 ◽  
Vol 1 ◽  
pp. 544-546
Author(s):  
G.G. Fazio
Keyword(s):  
Solar Cycle ◽  
Solar Flare ◽  
Gamma Rays ◽  
Solar Flares ◽  
Radiation Spectrum ◽  
High Energy ◽  
Electromagnetic Spectrum ◽  
Major Flare ◽  
Integral Energy ◽  
Flare Model

Thus far, only two experiments have detected solar γ-radiation with energy significantly greater than 200 keV. In both events the γ-ray emission occurred during a solar flare. The first observation was in 1958 by Peterson and Winckler (1959), who recorded a burst of radiation that occurred in less than 18 sec from a class-2 solar flare. The radiation spectrum peaked in the 200- to 500-keV region. Recently, Cline et al. (1967) recorded in the OGO-3 satellite three rapid γ-ray bursts in the 80-keV to 1-MeV energy range and measured the integral energy spectrum. The measurements were made on July 7, 1966, during the first high-intensity flare (importance 3) of the new solar cycle. Many attempts have been made to measure higher energy γ-radiation from the quiet Sun and from solar flares, but no flux has been detected; this is primarily due to the fact that no high-energy γ-ray detectors have viewed a major solar flare during the maximum of the optical or microwave burst. However, theoretical estimates of the flux of solar γ-rays, based on a simple flare model, indicate a readily detectable flux from a major flare even to photon energies of 100 MeV. It is therefore important that experiments be performed during the coming maximum of the solar cycle to investigate this region of the electromagnetic spectrum.

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