soho joseph b. gurman us project scientist for soho nasa goddard space flight center philip h....

SOHO

Joseph B. GurmanUS Project Scientist for SOHO

NASA Goddard Space Flight Center

Philip H. ScherrerPrincipal Investigator, MDI

Stanford University

Bernhard FleckEuropean Project Scientist for SOHO

ESA

S3C Senior Review, 2005•11•14

J.B. Gurman

Updates to proposal

•Science

•farside imaging•magnetoconvection / solar wind / coronal

heating•Great Observatory support

•Publications

•refereed•theses•notable/impact

•Public affairs


J.B. Gurman

Science update: farside imaging –

2000•Original method field of view: farside center ± 45º

•Uses information from two “skips” each way (near to far side and back)


J.B. Gurman

Science update: farside imaging –

2005

•Uses one skip out, 3 back plus 3 skips out, one back to add annulus from a few degrees on nearside to ~45° onto the farside, then combined with original method

•Also smooths the complex components of phase, rather than the angles

QuickTime™ and aGIF decompressor

are needed to see this picture.

● New method gives nearly complete nearside/farside maps


J.B. Gurman

Science update: Can the “magnetic carpet”

accelerate the solar wind as well as heat the

corona?•McIntosh et al. (submitted to Science) have compared SUMER Si II (2x104 K), C IV (105 K), and Ne VII (7.5 x 105 K) intensities and Doppler shifts in quiet Sun and beneath coronal holes

•Observations interpreted as reconnection along supergranular boundaries


J.B. Gurman

SOHO plays an integral rolein the Great

Observatory (I)•239 coordinated observations (Joint Observing

Programs, campaigns, intercalibrations) in 2003 - 2005

•140 involving spacecraft other than SOHO

•90 involving groundbased observatories

•only 73 involving only SOHO instruments

•> 2/3 of all coordinated observations involved other facilities


J.B. Gurman

SOHO plays an integral rolein the Great

Observatory (II)•Mean number of hours per day at least one SOHO instrument is involved in a coordinated observation

Num

ber

of

hours

/day


J.B. Gurman

Refereed publications

update

•2003 - 2005 total now exceeds 2,300

•Also over 2,300 individual authors

Calendar YearRefereed Journals Only

1996 31

1997 126

1998 174

1999 297

2000 294

2001 209

2002 287

2003 303

2004 332

2005 Jan. - Oct. 259

Total 2,312


J.B. Gurman

Theses update

•40 Ph.D. theses in the last three years

•Geographical distribution of Ph.D. theses, 2003 - 2005: US (11), Germany and France (8 each), UK (4), Turkey (3), Spain, Switzerland (2 each), Norway, Russia (1 each)

• In addition, a B.Sc., several Masters, and two habilitations

YearNumber of

Ph.D. Theses

1996 81997 8

199818

1999 24

200010

2001 192002 5

200310

2004 14

200516

Total132


J.B. Gurman

Notable Publications

• Moran and Davila 2004, Science, 305, 66: 3-D pB imaging of CME's

• Foukal, North, and Wigley 2004, Science, 306 (5693), 68: Limit on solar "forcing" of historical terrestrial climate

• Lallement et al. 2005, Science, 307 (5714), 1447: Interstellar "compass" from different directions of H and He flow

• Tu et al. 2005, Science, 308, 519: Origin of solar wind in coronal hole magnetic funnels

• Prangé et al. 2004, Nature, 432, 78: Tracing a CME/ICME from the Sun (2000 November 8) to Saturn (Saturnian aurorae; 2000 December 7 - 8)

• Kohl et al., 2005, A&A, in press: Review of UV spectroscopy of the extended solar corona (121 pp.)


J.B. Gurman

Press/Web Releases (2003

Q2-Q4)• 2003 June: "Comet Survivors" (sungrazing comet tails survive after disapperance of nuclei)

• 2003 September: SOHO wins Laurel for Team Achievement award of IAA

• 2003 October 15: "Eight Years of Spectacular Solar Gazing"

• 2003 October 23: "SOHO Spots Jupiter-Sized Sunspot and Earth-Directed Flares"

• 2003 October 29: "Tuesday/Wednesday Solar Punch" (X17 flare, CME, proton, SEP event)

• 2003 October - November: NASA TV "Solar Storm" videos --- video monitoring service wanted to raise NASA's rates

• 2003 November 4: "Space Weather Gone Crazy -- Another Historic Flare"

• 2003 November 19: "Sun Sheds Skin and Flips" (polarity reversal and CME distribution)

• 2003 November 21: "SOHO tracks recent stormy regions on Sun's far side as they turn for second shot at earth"


J.B. Gurman

Press/Web Releases (2004)

• 2004 March 15: "SOHO Spots a Prominent Prominence" (large eruptive)

• 2004 April 15: "New Comet to Make Internet Appearance" (Comet Bradfield)

• 2004 July 1: "First 3D View of Solar Eruptions" (pB CME results)

• 2004 July 22: "Sunspot Now Size of 20 Earths"

• 2004 November 10: "An Unusual Light Show" (CME and aurorae)


J.B. Gurman

Press/Web Releases (2005)

• 2005 April 24: "Join in the Search for SOHO's 1,000th Comet" (Comet contest)

• 2005 May 19: "Deep Roots of the Solar Wind" (SOHO/TRACE result)

• 2005 May 24: "Highlights from NASA's Sun-Solar System Connection"

• 2005 May 24: "Solar 'Fireworks' Signal New Space Weather Mystery" (2005 January 20 events)

• 2005 May 31: "Solar Cloud on a Sunny Day"

• 2005 August 17: "History's Greatest Comet Hunter Discovers 1,000th Comet"

• 2005 August 23: "Double Solar Flare"

• 2005 September 12: "Huge Solar Flares Continue" (no current SOHO imagery)


J.B. Gurman

Backup slides follow


J.B. Gurman

Coronal tomography: three vs. two

views•Assume a flux-rope CME model; how does it look to three coronagraphs?

•Two in ecliptic, one over pole:

Original

Reconstruction


J.B. Gurman


views•Assume a flux-rope CME model; how does it look to three coronagraphs?

•All three in ecliptic:

Original

Reconstruction


J.B. Gurman


views•Assume a flux-rope CME model; how does it look to just twojust two coronagraphs?

Original

Reconstruction


J.B. Gurman

Supergranules and Doppler shifts

• Ne VII blueshifts overly C IV blueshifts only at supergranular boundaries

• These coincident upflows occur only in coronal holes

• Conclusion: reconnection to open field lines within coronal holes conducive to outflow; in closed-field regions, to heating


J.B. Gurman

Lies, Damn Lies, Statistics, Web

Statistics•SOHO Website: typically 0.35 - 0.70 Tbyte week -1 of traffic; up to 2.6 Tbyte week -1 during 2003 October - November events

•SDAC Website: ≥ 0.10 Tbyte week -1, mostly SOHO images and data (both Websites hit by lots of bots)

•Stanford MDI Website: ~ 5 Tbyte of data in the last year

•EIT Web catalog/ftp interface: ~ 1.5 Tbyte of data so far this year


J.B. Gurman

Consumables: power


J.B. Gurman

Consumables: fuel

Text

soho joseph b. gurman us project scientist for soho nasa goddard space flight center philip h....

Documents