Proposal ID Gopalswamy_181

Date of Proposal Oct 10 1998

firstname

Nat

lastname

Gopalswamy*

institute

NASA/GSFC

address

Bldg 26, Room G-1, Mail Code 682.3
NASA/GSFC, Greenbelt, MD 20742

email

gopals@fugee.gsfc.nasa.gov

phone

301-286-5885

fax

301-286-0264

proposal

Magnetohydrodynamic shocks have been inferred from solar radio
bursts of type II in the corona and interplanetary medium. There
is a long standing controversy regarding the driver of these
shocks. Flares and coronal mass ejections (CMEs) co-exist in a
typical coronal event associated with a shock wave and so it is
not clear which one of these two phenomenon is responsible for
producing the shock. Currently, the following ideas are prevalent:
(i) Both flares and coronal CMEs produce shocks independently,
(ii) Flares produce CMEs which in turn produce shocks, (iii) Fast
CMEs is the sole source of coronal and interplanetary shocks. We
propose to evaluate these three possibilities in the light of
what we have learned after the advent of SOHO and Wind missions
which have provided new information on this issue.
One important aspect of this controversy is the relation between
coronal and interplanetary type II bursts.

We have chosen a set of 28 solar eruptive events that have
simultaneous data coverage from SOHO (EIT, LASCO), YOHKOH (SXT)
and WIND (WAVES) missions. These events will help us track
various disturbances that occur from close to the solar surface
and continue out into the corona and interplanetary medium
so that we can identify the relationship between shocks, flares
and CMEs.

Co-investigators:
M. L. Kaiser
B. J. Thompson
J. B. Gurman
O. C. St. Cyr
H. S. Hudson
Y. Hanaoka

List of Events:

no. date UT (approx.)

1. 970401 1400
2. 970407 1430
3. 970512 0515
4. 971103 0515
5. 971103 1030
6. 971104 0600
7. 971106 1220
8. 971127 1330
9. 971212 2245
10. 980121 0400
11. 980125 1400
12. 980329 0315
13. 980420 0420
14. 980423 0423
15. 980427 0925
16. 980427 1140
17. 980502 1410
18. 980502 1425
19. 980502 1650
20. 980503 2230
21. 980506 0825
22. 980509 0335
23. 980511 2140
24. 980519 1000
25. 980527 1330
26. 980611 1015
27. 980616 1820
28. 980620 2110

* National Research Council's Senior Research Associate.

inside_collab

J. B. Gurman

consortium

no

topic

Solar-Terrestrial Relations

topic

Shocks, CMEs and Flares

title

Origin of Coronal and Interplanetary Shocks

update added on 2001/10/06 at 01:17:52

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