Microscale Structures on the Quiet Sun and Coronal Heating

2000 ◽  
Vol 544 (1) ◽  
pp. 550-557 ◽  
Author(s):  
V. Aletti ◽  
M. Velli ◽  
K. Bocchialini ◽  
G. Einaudi ◽  
M. Georgoulis ◽  
...  
Keyword(s):  
Coronal Heating ◽  
Quiet Sun

scholarly journals OBSERVATIONS OF AN ENERGETICALLY ISOLATED QUIET SUN TRANSIENT: EVIDENCE OF QUASI-STEADY CORONAL HEATING

2015 ◽  
Vol 810 (2) ◽  
pp. 98 ◽  
Author(s):  
N. Brice Orange ◽  
David L. Chesny ◽  
Hakeem M. Oluseyi
Keyword(s):  
Coronal Heating ◽  
Quiet Sun

scholarly journals Coronal Heating and Solar Wind Formation in Quiet Sun and Coronal Holes: A Unified Scenario

2021 ◽  
Vol 908 (1) ◽  
pp. 28
Author(s):  
Durgesh Tripathi ◽  
V. N. Nived ◽  
Sami K Solanki
Keyword(s):  
Solar Wind ◽  
Coronal Holes ◽  
Coronal Heating ◽  
Quiet Sun

scholarly journals Quiet Sun coronal heating: Analyzing large scale magnetic structures driven by different small-scale uniform sources

2002 ◽  
Vol 382 (2) ◽  
pp. 713-721 ◽  
Author(s):  
O. Podladchikova ◽  
T. Dudok de Wit ◽  
V. Krasnoselskikh ◽  
B. Lefebvre
Keyword(s):  
Large Scale ◽  
Coronal Heating ◽  
Small Scale ◽  
Quiet Sun ◽  
Magnetic Structures

scholarly journals Quiet Sun coronal heating: A statistical model

2002 ◽  
Vol 382 (2) ◽  
pp. 699-712 ◽  
Author(s):  
V. Krasnoselskikh ◽  
O. Podladchikova ◽  
B. Lefebvre ◽  
N. Vilmer
Keyword(s):  
Statistical Model ◽  
Coronal Heating ◽  
Quiet Sun

CORONAL HEATING BY THE INTERACTION BETWEEN EMERGING ACTIVE REGIONS AND THE QUIET SUN OBSERVED BY THE SOLAR DYNAMICS OBSERVATORY

2015 ◽  
Vol 799 (2) ◽  
pp. L27 ◽  
Author(s):  
Jun Zhang ◽  
Bin Zhang ◽  
Ting Li ◽  
Shuhong Yang ◽  
Yuzong Zhang ◽  
...  
Keyword(s):  
Active Regions ◽  
Coronal Heating ◽  
Solar Dynamics Observatory ◽  
Quiet Sun ◽  
Solar Dynamics

scholarly journals Extreme-ultraviolet bursts and nanoflares in the quiet-Sun transition region and corona

2021 ◽  
Vol 647 ◽  
pp. A159
Author(s):  
L. P. Chitta ◽  
H. Peter ◽  
P. R. Young
Keyword(s):  
High Resolution ◽  
Solar Atmosphere ◽  
Significant Role ◽  
Extreme Ultraviolet ◽  
Coronal Heating ◽  
Solar Dynamics Observatory ◽  
Quiet Sun ◽  
Solar Dynamics ◽  
Event Based ◽  
Open Question

The quiet solar corona consists of myriads of loop-like features, with magnetic fields originating from network and internetwork regions on the solar surface. The continuous interaction between these different magnetic patches leads to transient brightenings or bursts that might contribute to the heating of the solar atmosphere. The literature on a variety of such burst phenomena in the solar atmosphere is rich. However, it remains unclear whether such transients, which are mostly observed in the extreme ultraviolet (EUV), play a significant role in atmospheric heating. We revisit the open question of these bursts as a prelude to the new high-resolution EUV imagery expected from the recently launched Solar Orbiter. We use EUV image sequences recorded by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO) to investigate statistical properties of the bursts. We detect the bursts in the 171 Å filter images of AIA in an automated way through a pixel-wise analysis by imposing different intensity thresholds. By exploiting the high cadence (12 s) of the AIA observations, we find that the distribution of lifetimes of these events peaks at about 120 s. However, a significant number of events also have lifetimes shorter than 60 s. The sizes of the detected bursts are limited by the spatial resolution, which indicates that a larger number of events might be hidden in the AIA data. We estimate that about 100 new bursts appear per second on the whole Sun. The detected bursts have nanoflare-like energies of 1024 erg per event. Based on this, we estimate that at least 100 times more events of a similar nature would be required to account for the energy that is required to heat the corona. When AIA observations are considered alone, the EUV bursts discussed here therefore play no significant role in the coronal heating of the quiet Sun. If the coronal heating of the quiet Sun is mainly bursty, then the high-resolution EUV observations from Solar Orbiter may be able to reduce the deficit in the number of EUV bursts seen with SDO/AIA at least partly by detecting more such events.

Sign in / Sign up

Export Citation Format

Share Document