PETER GILES PhD Applied Physics, Stanford University Former Research Assistant, Solar Oscillations Investigation Former Observer, Wilcox Solar Observatory (here's the current observer) I am now working at Computing Devices Canada My dissertation is available in whole or in parts, in PostScript or PDF versions.

Research Project

TIME-DISTANCE HELIOSEISMOLOGY, developed by Tom Duvall and others, is a technique which uses acoustic wave travel times to infer the structure and/or dynamics of the solar interior. Using this technique, I have been searching for large-scale flows in the solar convection zone. In November of 1997 we published a Letter to Nature which reported the first subsurface measurements of the global meridional circulation of the sun. Those results were also announced as part of a NASA Space Science Update.

My dissertation is available in whole or in parts, in PostScript or PDF versions.

For more information about helioseismology, visit the SOI tutorial.

A subsurface flow of material from the Sun's equator to its poles

P. M. Giles, T L. Duvall, Jr., P. H. Scherrer, R. S. Bogart, 1997, Nature 390, p. 52.

**Reprints available (via snail mail) upon request.

Solar Rotation and Large-Scale Flows Determined by Time-Distance Helioseismology from MDI

P. M. Giles, T L. Duvall, Jr., 1998, in New Eyes to See Inside the Sun and Stars, Proc. IAU Symp. 185, F.-L. Deubner et al. (eds.), Kluwer, Dordrecht, p. 149.

**PostScript reprint (100kB)
**PDF reprint (673kB)

Time-Distance Measurements of Subsurface Rotation and Meridional Flow

P. M. Giles, T L. Duvall, Jr., P. H. Scherrer, 1998, in Structure and Dynamics of the Interior of the Sun and Sun-Like Stars, S. G. Korzennik & A. Wilson (eds.), ESA Publications Division, Noordwijk, pp. 775-780.

**PostScript preprint (328kB)
**PDF reprint (1.5Mb)

December, 1996

American Geophysical Union 1996 Fall Meeting, San Francisco, CA

Oral Presentation: The Effect Of Surface Layers on Solar Oscillation Frequencies (abstract)

April 1-4, 1997

Local Area Helioseismology Workshop, Cambridge, United Kingdom

Oral Presentation: Measuring Flows with Time-Distance Helioseismology

June 27 - July 1, 1997

Meeting of the Solar Physics Division of the AAS, Bozeman, MT

Oral Presentation: Solar Meridional Circulation and Rotation Determined by Time-Distance Helioseismology using MDI Data From SOHO (abstract)

August 18-22, 1997

IAU Symposium 185, Kyoto, Japan

Oral Presentation: Solar Rotation and Large-Scale Flows Determined by Time-Distance Helioseismology from SOHO/MDI (abstract) (reprint -- 100 kB PostScript -- 673 kB PDF)

November 4-5, 1997

User Transition Workshop, National Center for Supercomputing Applications, Champaign-Urbana, IL

December 8-12, 1997

American Geophysical Union 1997 Fall Meeting, San Francisco, CA

Poster Presentation: Time-Distance Measurement of Solar Meridional Circulation and Rotation From MDI (abstract)

**Chosen as an Outstanding Student Paper

May 26-29, 1998

Meeting of the Solar Physics Division of the AAS (joint with AGU), Boston, MA

Oral Presentation: Helioseismic Measurements of Subsurface Meridional Flow From MDI (abstract)

June 1-4, 1998

SOHO6/GONG98 Workshop, Boston, MA

Poster Presentation: Time-Distance Measurements of Subsurface Rotation and Meridional Flow (abstract) (reprint -- 328kB PostScript -- 1500kB PDF)

August 15-21, 1998

Interdisciplinary Inversion Summer School, Copenhagen, Denmark

Poster Presentation: Time-Distance Helioseismology: Large-Scale Flows

January 4-8, 1999

Helioseismology Workshop, JILA, University of Colorado at Boulder, CO

Oral Presentation: Synoptic Maps of Solar Flows From Time-Distance Helioseismology

March 22-24, 1999

GONG99 Workshop, Tucson, AZ

Poster Presentation: Time-Distance Measurements of Meridional Circulation: Probing Deeper Into the Convection Zone (PostScript abstract)

May 30-June 3, 1999

194th AAS Meeting, Chicago, IL

Oral Presentation: Large-Scale Solar Flows From Time-Distance Helioseismology (abstract)

July 12-15, 1999

SOHO9 Workshop, Stanford, CA

Oral Presentation: Time-Distance Measurements of the Meridional Circulation Deep in the Convection Zone (abstract) (viewgraphs -- 1100kB PostScript -- 6200kB PDF)

	In November of 1997, I got married to Kate Latham. From 1988 to 1996, I was a member of the Canadian national sprint kayak team. In 1996 I represented Canada at the Summer Olympics in Atlanta.
Canada's Olympic K-4 in Atlanta. From front to back: Mihai Apostol, Renn Crichlow, Liam Jewell, and Peter Giles