RHESSI limb observations

H. S. Hudson

University of California, Berkeley

Ways to peer inside the Sun

• Theory: Hoyle; Bahcall

• Irradiance variability

• Shape and location of limb (RHESSI)

• Gravity

• Helioseismology

• New NASA program: solar core penetrator mission, featuring sample return

GONG

TRACE

WL

BBSO H

TRACE

1600 A19:43:03 –

19:44:03

20:02:03 – 20:03:03

20:20:03 – 20:21:03

19:43:17

20:02:30

20:20:40

19:43:56

20:02:26

20:20:56

19:43:46

20:02:59

20:21:08

“White light prominences”

Nov. 4 2003(professional)

Oct. 16 1989(amateur)

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TRACE view of WL prominence and flare4 November 2003 20:02:30 UT

What to do next?

• Continue characterization of data and weeding-out of systematic variations

• Studies of activity-related limb features (ARs, flares, prominences)

• Studies of shape (harmonic terms)

• Oscillations (p-modes for sure; g-modes -?-in collaboration with Quataert)