Radio Observations of Coronal Mass Ejections

Summary: CMEs in Radio

Defining a CME:
SOHO/LASCO/C3 Images

CME Structures in the
IP Medium: Magnetic Clouds

Prominence: H-alpha (left, Hiraiso) versus Microwaves (right, Nobeyama)

Prominence Eruption in Microwaves

A Prominence Eruption in Microwaves & EUV (304 A)
click on images to start movie

The Eruption of 2001 Dec 20

Dec 20, 2001 EUV

2001 Dec 20 LASCO/C2

2000 Oct 22 Event (Fast)

2000 Oct 22 LASCO/C2

Statistical Results
Gopalswamy, Shimojo,  Shibasaki et al. (2002)

BBSO Statistics: 50 limb events (from the last bin)

Radio Vs Ha Prominence Eruptions (PEs)

A Microwave CME: 2001/04/18
Gopalswamy, Shimojo, Shibasaki, & Howard (2002)

Nobeyama movie of the 2001/04/18 Eruption

Spatial Association: Radio & White Light

Microwave, SXT, EIT, LASCO

Height-Time Plot

Density, Mass,  Size, & Energy
(Preliminary Results)

Speed & Source Longitude of SEP-associated CMEs of Cycle 23
Gopalswamy et al. 2002, ApJL June 10 issue

Radio Sun in Meterwaves

Radio CMEs

A Type II Radio Burst

Image of a type II Burst

Meterwaves: Nonthermal

Two Shocks from the same source?

Meterwaves: Nonthermal

DH Type II Radio Bursts

Example of a DH type II burst due to a CME

Radio Signature due to CME Interaction: 00/06/10
This event is unlike the previous: there is a broadband emission for ~0.5 hr following a regular type II burst

A Slow CME is Deflected

A DH Type II & its CME

Properties of radio-rich CMEs

Type II burst starts when the CME reaches ~ 2 Ro !

Conclusions for FASR