scholarly journals Investigation of Drift Rate of Solar Radio Burst Type II due to Coronal Mass Ejections Phenomenon

2015 ◽  
Vol 48 ◽  
pp. 146-154 ◽  
Author(s):  
N.H. Zainol ◽  
Zety Sharizat Hamidi ◽  
N.N.M. Shariff ◽  
S. Arifin ◽  
C. Monstein
Keyword(s):  
Radio Burst ◽  
Coronal Mass Ejections ◽  
Solar Radio ◽  
Drift Rate ◽  
Plasma Frequency ◽  
Low Cost ◽  
Solar Radio Burst ◽  
Type Ii ◽  
Langmuir Waves ◽  
Low Drift

The formation of detected solar radio burst type II occurred was captured using Compound Astronomical Low Cost Frequency Spectrometer Transportable Observatory (CALLISTO) system which gives a better resolution of a wonderful image than other countries. The phenomenon was found on 2nd November 2014 at 09:39 [UT] in Switzerland. CALLISTO spectrometer device detects and traces a Coronal Mass Ejections (CMEs) phenomenon that causes the occurrence of the solar burst type II. As it happened, the drift rate of the solar radio burst Type II is calculated and discussed in details. Plasma frequency (fp), Langmuir waves and type II radiation relates each other in the establishment of this phenomenon. This paper presents a study of drift rate selected event of solar radio burst type II based on CMEs. The drift rate at this moment was about 3.2 MHz/s which has low drift rate thus the velocity OF THE CMEs was just about 695 km/s shown from NOAA.

scholarly journals Determining a Complex Solar Radio Burst Type II on 2nd November 2014 Driven by a Hydra Solar Flare as a Blast Waves

2015 ◽  
Vol 47 ◽  
pp. 87-93
Author(s):  
Zety Sharizat Hamidi ◽  
M.B. Ibrahim ◽  
N.N.M. Shariff ◽  
C. Monstein
Keyword(s):  
Radio Burst ◽  
Solar Radio ◽  
Low Cost ◽  
Low Frequency ◽  
Leading Edge ◽  
Blast Waves ◽  
Solar Radio Burst ◽  
The Sun ◽  
X Rays ◽  
Type Ii

Recent data of a complex solar radio burst type II is analyzed and reviewed. The monitoring of solar radio burst was done by using the Compact Astronomical Low cost, Low frequency Instrument for Spectroscopy and Transportable Observatory (CALLISTO) from BLEIN 7 meter dish telescope at ETH, Zurich in frequency range of 25 until 1000 MHz. During the inspection of the X-ray spectrum, we observed that the C3-category flare was caused by a filament of magnetism, which rose up and erupted between 0400 and 0600 UT. This occurred three hours before the signature of solar radio burst type II. There are some of the material in the filament fell back to the sun, causing a flash of X-rays where it hit the Sun surface. This is a Hydra Flare which occurred without sunspots. On the basis of these results, we suggest that a single shock in the leading edge of the CME could be the source of the multiple type II bursts and support the notion that the CME nose and the CME-streamer interaction are the two main mechanisms able to generate the bursts.

scholarly journals Type II Solar Radio Burst with a Split and Herring − Bones during a Minimum Solar Activity

2014 ◽  
Vol 32 ◽  
pp. 104-111
Author(s):  
Zety Sharizat Hamidi ◽  
N.N.M. Shariff ◽  
C. Monstein
Keyword(s):  
Solar Activity ◽  
Solar Flare ◽  
Radio Burst ◽  
Solar Flares ◽  
Solar Radio ◽  
Correlation Study ◽  
Solar Radio Burst ◽  
Type Ii ◽  
Type Iii ◽  
Lower Stage

A preliminary correlation study of the herring − bone type II with a type III solar burst of has been made. On the basis of this study and in combination with the observation in radio emission, an interpretation of the mechanism of the occurrence of this event has been proposed. The type II solar radio burst with a split and herring bone is occurring at the same time from 36 MHz till 50 MHz. We have noted that an individual type III burst also can be observed at 13:23 UT from 45-50 MHz. During that day, a stream of solar wind from a coronal hole on the Sun has disturbing Earth's magnetosphere creating a minor geomagnetic storm, G1 on the NOAA scale of G1-G5. In this case, the solar flare is not very high, but CME is responsible to form a solar radio burst type II. Overall, based on seven days observation beginning from 25th March 2013, the solar activity is considered as very low. The highest solar flare can be observed within 7 days is only a class of B8 flare. There was no CMEs event that directed to the Earth is detected. The geomagnetic field activities are also at minimum level. Although the solar flare event is at a lower stage, it is still possible to form the solar radio burst type II which is associated with CME event. From the selected event, although theoretically solar radio burst type II is associated with CMEs, there is no compelling solar radio burst type II without a flare. The only difference is the dynamic structure and the intensity and speed of both phenomena (solar flares and CMEs) which depend on the active region. Nevertheless, understanding how energy is released in solar flares is one of the central questions in astrophysics. This solar radio burst type II formation is the first event that successfully detected by e-CALLISTO network in 2013.

Direction-finding Analysis of the 2012 July 6 Type II Solar Radio Burst at Low Frequencies

2018 ◽  
Vol 867 (1) ◽  
pp. 40 ◽  
Author(s):  
Pertti Mäkelä ◽  
Nat Gopalswamy ◽  
Sachiko Akiyama
Keyword(s):  
Radio Burst ◽  
Solar Radio ◽  
Direction Finding ◽  
Solar Radio Burst ◽  
Type Ii ◽  
Low Frequencies

A Study of Multiple Type II Solar Radio Events

1982 ◽  
Vol 4 (4) ◽  
pp. 392-396 ◽  
Author(s):  
R.D. Robinson ◽  
K.V. Sheridan
Keyword(s):  
Solar Corona ◽  
Radio Burst ◽  
Solar Radio ◽  
Solar Radio Burst ◽  
Type Ii ◽  
Narrow Bandwidth ◽  
Wavelength Emission ◽  
The Subject ◽  
Multiple Type

A Type II solar radio burst is a relatively narrow-bandwidth metre-wavelength emission which drifts outward in the solar corona at a velocity between 500 and 1500 km s-1. It was first described by Wild and McCready (1950) and since then it has been the subject of numerous investigations (see e.g. McLean 1974; Nelson and Robinson 1975).

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