100

https://ntrs.nasa.gov/search.jsp?R=20070038370 2017-09-21T22:10:04+00:00Z

Hinode

Observations

of the Onset

A. C. Sterling,

We use Hinode magnetogram observe

in TRACE

and strong slow-rise hours

X-Ray

EUV

soft X-ray period.

before

Telescope

observations,

R. L. Moore,

and Solar

to study the early images.

flaring,

Magnetic

eruption.

(XRT)

onset

The filament

the slow-rise

Optical

Filament

and the Hinode

Telescope

along

phase,

a soft X-ray

(SOT)

filtergraph

that includes

the physical

the neutral

by the filament,

Eruption

Team

a slow rise for about

data elucidate

occurs

reconnection low in the sheared core field traced EUV and SXRs at the start of the slow rise.

of a Solar

of a solar eruption

undergoes

and the new Hinode

flux cancelation

During

Stage

(FG)

sigmoid

and there

filament

that we

20 min prior to its fast eruption processes

occurring

line of the filament,

(SXR)

Stokes-V

an erupting

forms

during

beginning from

is a low-level

the

several

apparent

intensity

peak

in both

Hinode Observations of the Onset Stage of a Solar Filament Eruption '-

Alphonse C. Sterling! and Ronald L. Moore NASAlMSFC

and the Hinode Team 1

Currently at JAXAJISAS, Sagamihara, Japan

Sterling, Dublin 2007

Introduction • Trying to understand solar eruptions. • Using filaments as tracers of the erupting field. • Detailed examination of several individual events. • Today we present our first Hinode-observed filament eruption, from 2007 March 2. • First question addressed: What leads to preeruption slow rise of filaments?


Filament pre-eruption, pre-flare slow-rise phase 1X10 5 8X10 4 --.

E

~

4-.8

[I) 4-"

6X10 4

C l)

4-,6 -.:..

"--/

-+-'

...r::: Of

Q

+J

4x10 4

o

-+-'

'--/

IV

4-.4-

I "l:J IIJ

2X10 4

U

c

Q)

+J

/

ill

e

:>-,

;~

(f)

path b

-+-J

'--'

1(1)

0

4-.2 c

x

o

Q..

[0

-2X10 4

4-.0 ~ --l

-4X10 4 21 :00

00:00

03:00 05:00 nme 1999 April 17 - 18 (UT)

09:00

12:00

Sterling, Moore, Thompson (200 1)

(e.g., Tandber-Hanssen et al. 1980, Kahler et al. 1988) Sterling, Dublin 2007

Hinode Event: Data Sets • On-disk filament eruption of 2 March 2007. GOES class B 2.5. • Seen with TRACE, STEREO, Hinode. • Use TRACE for filament • Hinode: - SOT (FG V magnetogram), etc. - SXRs from XRT

• Also use MDI magnetogram Sterling, Dublin 2007

Image Alignment • TRACE on MDI: both alignments known. • Match SOT and MDI magnetograms => SOT on MDI, TRACE. • XRT onto SOT: Internal Hinode studies (H. Hara, N. Narukage; private communication), plus "by eye." => XRT·' onto MDI, TRACE. Sterling, Dublin 2007

STEREO 171


TRACE 171


TRACEonMDI


'-

TRACEonMDI

07 04:33:38 U\b) TRACE 171: 2-Mar-2007 04:47:41 (c) -

-

-

140

140:

120

120:

.-. 100

~

Q)

en ~

co

-->-

) 260 280

TRA~

.-.

8 (])

80 60

(J) () "-

co

....' -'"

>-

100:

80 60

40

40

20

20

oL...J.....J.-~II....I.......I~~

o

140 160 180 200 220 240 260 280 X (arcsecs)

140

Sterling, Dublin 2007 '-

HinodeXRT


XRT (blowup)


XRTonMDI (a) XRT Ti-Poly: 2-Mar-2007 04:12:33 U"'{b) XRT Ti-Poly: 2-Mar-2007 04:43:18 (c) XRT Ti-Poly: 2-MaI-200705:02:

-w

120

120

120

100

100

100

-w

80

0)

een

en e.

60

-

~

>-

-w

80

0)

en

e

60

>-

60

~

(1j

40

80

0)

>-

40

40

20

20

20

o

o

o

140 160 180 200 220 240 260 280 X (arcsecs)

140 160 180 200 220 240 260 280 X (arcsecs)

140 160 180 200 220 240 260 280 X (arcsecs)

(c) XRT AI Thick: 2-Mar-2007 05:13: 14 (c) XRT Ti-Poly: 2-Mar-2007 05:16:03 (c) XRT AI Thick: 2-Mar-2007 05:28 150

en

150

100

en

()

0)

.... (1j

....

en

>--

100

100

-W

()

0) ()

150

0)'

en

en

....(1j

()

50

~

()

-

50

>0

-50 100

150

200 250 X (arcsecs)


300

50

>-

0

0

-50 100

-50 100

150

200

250

X (arcsecs)

300

150

200

250

X (arcsecs)

300

,

XRTonMDI

(a) XRT Ti-Poly: 2-Mar-2007 04:12:33 UTb) XRT120

120 '-

100,

100 ~

(J)

u

80

1

~

(J)

u

CD

Q)

(J) () ~

(J)

60

() ~

60

ro

co

"'-""

"'-""

>-

80

>-

40

40

i

20

201

I i

0

'-

140 160 180 200 220 240 260 280 X (arcsecs)

Ste I\." I

1""""'.....

A

I......

•

I

,.....

a,.

,..... ,..... """ _

""" _

0 140 1

~

"""

....I

~

I\." I

r""'..... -

XRTonMDI

)4:12:33 U\b) XRT Ti-Poly: 2-Mar-2007 04:43:18 (c) XR' 120

120' i

100

100: ...-...

~

80;

...-... en u

80

60i

(J)

60

Q)

Q)

(f) () ~

ctS

"-""

>-

) 280

40

!I

":.

-

40 20, ,

0' 260 280

140 160 180 200 220 240 260 280 X (arcsecs)

",

SOT FG V magnetogram

80

60

+0 ..-.. lO. 0

III lO

zoo

e

~

>Q

-20

-4-0 -150


-100

-50

o

50

100

SOT FG/V (blowup)

.,

..

-1:30

-1-10'

:t:lorc"",csl


-90

2-Mar-200704:54

-

-150

·150 100

150

200

X (arcsecs)

250

100

150

200

X (arcsecs)

250

100

150

200 X (arcsecs)

250

Cf. Feynman & Ruzmaikin (2004) (also, e.g., Rust 1976, Heyvaerts et al. 1977, and many others).


"

Slow-rise phase: Tether-Weakening Reconnection?

Sterling, Rarra, Moore (2007)

Sterling, Dublin 2007 '.

Some Theories for Eruption Onset: • Tether cutting. Moore & Labonte (1980); Sturrock (1989); Moore et ale (1997; 2001). (Also Chen 0& Shibata 2000 and Lin et ale 2001.) ~ Fundamentally bipolar. ~ Energy release via reconnection deep inside the "core field." • Breakout model. Antiochos (1998); Antiochos et al. (1999). ~ Fundamentally multi-polar, with bipole core fields and restraining overlying fields. ~ Earliest energy release via slow reconnection at interface. " • MHD Instability. Sturrock et al (2001); Rust & LaBonte (2005) ~ Rapid rise prior to reconnection onset. Sterling, Dublin 2007

Some Theories for Eruption Onset: • Tether cutting. Moore &·Labonte (1980); Sturrock (1989); Moore et al. (1997; 2001). (Also Chen & Shibata 2000 and Lin et al. 2001.) ~ Fundamentally bipolar. ~ Energy release via reconnection deep inside the "core field." '.

• Breakout model. Antiochos (1998); Antiochos et al. (1999). ~ Fundamentally multi-polar, with bipole core fields and restraining overlying fields. ~ Earliest energy release via slow reconnection at interface. • MHD Instability. Sturrock et al (2001); Rust & LaBonte (2005) ~ Rapid rise prior to reconnection onset. ~ Sterling, Dublin 2007

TRACE

"


TRACE (over)

'.

150

'.

150


2.50

X·(ti~3CC~J

350.

400

TRACEonMDI

(a) TRACE 171: 2-Mar-2007 04:33:38 U"{b) TRACE 171: 2-Mar-200704:47:41 (c) TRACE 171: 2-Mar-200705:12: 140

140

140

120

120

120

___ 100

___ 100

___ 100

(/J ()

(/J ()

Q)

Q)

(/J ()

.... -

80

(/J

2

~

60

>-

(/J ()

Q)

80

(/J ()

....

~

60

>-

80 60

40

40

40

20

20

20

O............."""""'