1 LPI
17.12.2015
2 IKI
RAS, Moscow, Russia
ISSI, Beijing, China
RAS, Moscow, Russia
1
An example of along-PIL brightening of flare arcade
Zimovets (PhD, 2010)
17.12.2015
ISSI, Beijing, China
2
Examples of along-PIL motions of flare HXR sources
Grigis & Benz (ApJ, 2005)
17.12.2015
Zimovets & Struminsky (SP, 2009)
ISSI, Beijing, China
3
Cartoon of the observations
Main Features:
17.12.2015
•
QPPs are not harmonic
•
Different pulsations are emitted from
different loops of the flare arcade
•
Energy release trigger propagates
predominantly along the flare arcade’s axis
and PIL
•
L ~ 1000 - 10000 km
•
V ~ 10 – 100 km/s (V < VS < VA)
•
PQPP ~ 10 – 100 (0) s
ISSI, Beijing, China
4
Model based on the slow MHD waves in flare arcade
CS or X-lines
z
PQPP ~ 10 – 100 (0) s
 ~ 0.01 – 1.00 1/s
VS  150-300 km/s
Vgz ~< 100 km/s
 ~ 1 – 10 (0) Mm
Dispersion
Vgz
Fast wave
[CSkx]
CA=1.2CS
[CS]
CA=1.2CS
CA=2.0CS
CA=3.0CS
28-30
Slow wave
[kx]
[kx]
x
Nakariakov & Zimovets (ApJ, 2011)
17.12.2015
ISSI, Beijing, China
5
Model based on flapping oscillations of vertical current sheet
2D model
3D Cartoon
HXR QPPs
Artemyev & Zimovets (SP, 2012)
PQPP ~ 0.1 - 1000 s
λ ~ 0.1 – 100 Mm
Shear component (BY≠0) is included
17.12.2015
ISSI, Beijing, China
6
Dynamics of the B-field in NOAA AR 09847-09848
Positive flux emergence and disappearance
17.12.2015
ISSI, Beijing, China
7
SPIRIT experiment onboard CORONAS-F
2001 - 2005
Zhitnik et al. (SSR, 2005)
17.12.2015
ISSI, Beijing, China
8
Temperature response of Mg XII channel
Reva et al. (SP, 2015)
17.12.2015
ISSI, Beijing, China
9
Observations of wave-like formation of hot flare arcades
17.12.2015
ISSI, Beijing, China
10
Sequence of images for one event
17.12.2015
ISSI, Beijing, China
11
Images for one event at one moment
17.12.2015
ISSI, Beijing, China
12
Trigger of the events (precursor)
17.12.2015
ISSI, Beijing, China
13
Spatially integrated light curves for one event
17.12.2015
ISSI, Beijing, China
14
Light curves for each loop and precursor for one event
17.12.2015
ISSI, Beijing, China
15
Max intensity of loops vs. distance from the precursor
17.12.2015
ISSI, Beijing, China
16
Possible magnetic topology of the events (without CS)
y
z
Source of the precursor
17.12.2015
ISSI, Beijing, China
17
Cartoon of the events (with CS)
17.12.2015
ISSI, Beijing, China
18
Implementation of our model
From observations:
•
•
•
•
•
•
•
1 MK < T < 15 MK
150 < VS < 650 km/s
Vy  700 km/s
  50 Mm
  30
Lx = ?
VA = ? (500-1500 km/s)
From theory:
Artemyev & Zimovets (SP, 2012)
•
• 3 Mm < Lx < 30 Mm (reasonable)
17.12.2015
ISSI, Beijing, China
19
Instead of conclusions
How to explain “chaotic” motion of HXR sources of QPPs?
17.12.2015
ISSI, Beijing, China
20
Thank you!
Courtesy: SDO/AIA
17.12.2015
ISSI, Beijing, China
21