Doug Braun's
Current Research and Publications

Contact information:

Douglas C. Braun
NorthWest Research Associates, CORA Office
3380 Mitchell Lane
Boulder CO 80301-5410 USA

phone: 303 415 9701 x226
fax: 303 415 9702

email: dbraun at cora.nwra.com

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• Helioseismology Instrument and Data Sites: HMI , GONG , MDI

• Local Helioseismology (Living Reviews article by L. Gizon and A. C. Birch)

• Helioseismogy-ready Data from SDO Science Center: realistic sunspot models by M. Rempel (HAO/NCAR) and emerging flux properties by Y. Fan (HAO/NCAR)

• C code for performing Hankel decomposition of helioseismic data by D. Braun (NWRA)

• GONG and HMI farside imaging site (2006-present) MDI farside archive (Mar 1996 - Feb 2011)

• holography lecture and hands-on material for 2005 Summerschool in Helioseismology. The web site, and complete set of material, for the school is available here.

Peer-reviewed publications (since 1999 only)

• Braun, D.C., Birch, A.C., Rempel, M., and Duvall, T.L. Jr. 2012, "Helioseismology of a Realistic Magnetoconvective Sunspot Simulation," Ap J., 744, 77 reprint (pdf)

• Birch, A.C., Parchevsky, K., Braun, D.C., and Kosovichev, A. 2011, "Hare and Hounds Tests of Helioseismic Holography," Solar Physics, 272, 11 reprint (pdf)

• Birch, A.C., Braun, D.C., and Fan Y. 2010, "An Estimate of the Detectability of Rising Flux Tubes," Ap J , 723, L190 reprint (pdf)

• Moradi, H. and 21 coauthors. 2010, "Modeling the Subsurface Structure of Sunspots," Solar Physics , 267, 1 reprint (pdf)

• Schunker, H. and Braun, D.C. 2010, "Newly Identified Properties of Surface Acoustic Power," Solar Physics , 268, 349 reprint (pdf)

• Gonzalez-Hernandez, I., Hill, F., Scherrer, P.H., Lindsey, C. and Braun, D.C. 2010 "On the Success Rate of the Farside Seismic Imaging of Active Regions," Space Weather , 8, reprint (pdf)

• Jain, R., Hindman, B.~W., Braun, D.~C., and Birch, A.~C. 2009, "Absorption of p Modes by Thin Magnetic Flux Tubes," Ap J , 695, 325 reprint (pdf)

• Gizon, L. and 14 coauthors. 2009, "Helioseismology of Sunspots: A Case Study of NOAA Region 9787," Space Sci. Rev. , reprint (pdf) erratum (pdf)

• Birch, A. C., Braun, D. C., Hanasoge, S. M., and Cameron, R. 2009, "Surface-focused Seismic Holography of Sunspots: II. Expectations from Numerical Simulations Using Sound-Speed Perturbations," Solar Phys. , 254, 11 reprint (pdf)

• Braun, D. C. and Birch, A. C. 2008, "Prospects for the Detection of the Deep Solar Meridional Circulation," Ap J , 689, L161 reprint (pdf)

• Braun, D. C., and Birch, A. C. 2008, "Surface-focused Seismic Holography of Sunspots: I. Observations," Solar Phys. , 251, 267 reprint (pdf)

• Schunker, H., Braun, D. C., Lindsey. C., and Cally, P.S. 2008, "Physical Properties of Wave Motion in Inclined Magnetic Fields Within Sunspot Penumbrae," Solar Phys. , 251, 341 reprint (pdf)

• Braun, D. C., Birch, A. C., Benson, D., Stein, R. F., and Nordlund, A. 2007, "Helioseismic Holography of Simulated Solar Convection and Prospects for the Detection of Small-Scale Subsurface Flows," ApJ , 669, 1395 reprint (pdf)

• Schunker, H., Braun, D. C. and Cally, P. S. 2007, "Surface magnetic field effects in local helioseismology," AN, 328, 292 reprint (pdf)

• Braun, D. C. and Birch, A. C. 2006, "Observed Frequency Variations of Solar p-Mode Travel Times as Evidence for Surface Effects in Sunspot Seismology," ApJ, 647, L187 reprint (pdf)

• Crouch, A.D, Cally, P.S., Braun, D. C., and Desjardins, M. 2005, "Genetic magnetohelioseismology with Hankel analysis data," M.N.R.A.S., 363, 1188. reprint (pdf)

• Schunker, H., Braun, D. C., Cally, P.S., and Lindsey, C. 2005, "Local Helioseismology of Inclined Magnetic Fields and the Showerglass Effect," Ap J., 621, L149. reprint (pdf)

• Lindsey, C. and Braun, D. C. 2005, "The Acoustic Showerglass I. Seismic Diagnostics of Photospheric Magnetic Fields," Ap J., 620, 1107. reprint

• Lindsey, C. and Braun, D. C. 2005, "The Acoustic Showerglass II. Imaging Active Region Subphotospheres," Ap J., 620, 1118. reprint

• Lindsey, C. and Braun, D. C. 2004, "Principles of Seismic Holography for Diagnostics of the Shallow Subphotosphere," Ap J. Suppl., 155, 209. reprint

• Cally, P.S., Crouch, A.D, and Braun, D. C. 2003, "Probing Sunspot Magnetic Fields with p-Mode Absorption and Phase Shift Data," M.N.R.A.S., 346, 381. reprint (pdf) , ADS Abstract

• Braun, D. C. and Lindsey, C. 2001, "Seismic Imaging of the Far Hemisphere of the Sun," Ap. J., 560, L189. reprint (pdf) , ADS Abstract

• Lindsey, C. and Braun, D. C. 2000, "Seismic Images of the Far Side of the Sun," Science, 287, 1799. reprint ADS Abstract

• Braun, D. C. and Lindsey, C. 2000, "Helioseismic Holography of Active-Region Subphotospheres," Solar Physics, 192, 285. reprint ADS Abstract

• Lindsey, C. and Braun, D. C. 2000, "Basic Principles of Solar Acoustic Holography," Solar Physics, 192, 261. reprint ADS Abstract

• Braun, D. C. and Lindsey, C. 2000, "Phase-sensitive Holography of Solar Activity," Solar Physics, 192, 307. reprint ADS Abstract

• Donea, A.-C., Lindsey, C., and Braun, D. C. 2000, "Stochastic Seismic Emission from Acoustic Glories and the Quiet Sun," Solar Physics, 192, 321. reprint ADS Abstract

• Donea, A.-C., Braun D. C. and Lindsey, C. 1999, "Seismic Images of a Solar Flare," Ap. J., 513, L143. ADS Abstract

• Braun D. C. and Lindsey, C. 1999, "Helioseismic Images of an Active Region Complex," Ap. J., 513, L79. ADS Abstract

• Lindsey, C. and Braun, D. C. 1999, "Chromatic Holography of the Sunspot Acoustic Environment," Ap. J., 510, 494. ADS Abstract

• Braun, D.C., Birch, A.C., Crouch, A.D. and Rempel, M. 2011, "The Need for Physics-based Inversions of Sunspot Structure and Flows," J. Phys.: Conf. Ser., 271, 012010. reprint

• Braun, D.C. and Wan, K.. 2011, "Properties of Near-surface Flows around Active Regions from Helioseismic Holography," J. Phys.: Conf. Ser., 271, 012007. reprint

• Braun, D.C., Birch, A.C., Crouch, A.D. and Rempel, M. 2010, "Toward Physics-based Inversions of Sunspot Structure," IAU 273: Physics of Sun and Star Spots Conference Proceedings reprint

• Crouch, A.D., Birch, A.C., Braun, D.C., and Clack, C.T.M. 2010, "Helioseismic Probing of the Subsurface Structure of Sunspots," IAU 273: Physics of Sun and Star Spots Conference Proceedings reprint

• Crouch, A.D., Cally, P.S., Charbonneau, P., Braun, D.C., Desjardins, M. 2006, "The Role of MHD Mode Conversion in Sunspot Seismology," ASP Conf.~Ser. 354: Solar MHD Theory and Observations: A High Spatial Resolution Perspective, 354, 161. proceedings

• Gonzalez Hernandez, I., Hill, F., Lindsey, C., Braun, D., Scherrer, P. and Hanasoge, S.M. 2006,"Farside Helioseismic Holography: Recent Advances," proceedings and poster and presented at the SOHO 18/GONG 2006/Helas 1 Meeting in Sehffield, U.K., 2006 Aug.

• Komm, R., Braun, D., Birch, A., and the GONG Team 2006,"Comparison of subsurface flows obtained with acoustic holography and ring analysis," poster presented at the SOHO 18/GONG 2006/Helas 1 Meeting in Sehffield, U.K., 2006 Aug.

• Braun, D.C., Birch, A., and Lindsey, C. 2004, "Local Helioseismology of Near-surface Flows," in Proceedings of SOHO 14 / GONG+ 2004. Helio- and Asteroseismology: Towards a Golden Future, , reprint

• Schunker, H., Braun, D.C., Lindsey, C., and Cally, P.S. 2004, "Local Helioseismology of Inclined Magnetic Fields and the Showerglass Effect," in Proceedings of SOHO 14 / GONG+ 2004. Helio- and Asteroseismology: Towards a Golden Future, , reprint

• Lindsey, C., and Braun, D.C. 2004, "The Penumbral Acoustic Anomaly," in Proceedings of SOHO 14 / GONG+ 2004. Helio- and Asteroseismology: Towards a Golden Future, , reprint

• Braun D.C. 2004, "Probing the Interior and Farside of the Sun (invited talk)," Connecting our Dynamic Sun to the Heliosphere and Geospace: A Living With a Star Workshop, Boulder, CO March 23-26, 2004

• Braun D.C.,Donaldson-Hanna, K., Harvey, J., Howe, R., Leibacher, J., Lindsey, C., Malanushenko, A., and Sudol, J. 2004, "GONG Near-Realtime Active Region Imagery as a Pathfinder for LWS/SDO," Connecting our Dynamic Sun to the Heliosphere and Geospace: A Living With a Star Workshop, Boulder, CO March 23-26, 2004

• Lindsey, C. and Braun D.C. 2004, "The Acoustic Showerglass," Local Helioseismology Comparison (LoHCo) Workshop 7, Tucson AZ Feb 10-11, 2004 powerpoint file

• Braun D.C. 2004, "Holography of Solar Dynamics," Local Helioseismology Comparison (LoHCo) Workshop 7, Tucson AZ Feb 10-11, 2004 powerpoint file

• Braun, D.C. and Lindsey, C. 2003, "Helioseismic Imaging of the Farside and the Interior," in Proceedings of SOHO 12 / GONG+ 2002. Local and Global Helioseismology: the Present and Future, ed. H. Sawaya-Lacoste, ESA SP-517 , (Noordwijk: ESA), 15. , reprint

• Lindsey, C. Braun, D.C. 2003, "The Showerglass Effect in Seismic Diagnostics of Active Region Subphotospheres," in Proceedings of SOHO 12 / GONG+ 2002. Local and Global Helioseismology: the Present and Future, ed. H. Sawaya-Lacoste, ESA SP-517 , (Noordwijk: ESA), 23. , reprint

• Braun, D.C. and Lindsey, C. 2002, "The First Seismic Images of the Solar Interior and Far Side from the GONG+ Network," Bul. Amer. Astron. Soc. , 34, 791. AAS press release ,

• Braun, D.C. 2002, "Helioseismological observations of active regions," invited talk at ITP Conference on Observational Challenges for the Next Decade of Solar Magnetohydrodynamics, Institute for Theoretical Astrophysics, UCSB. ITP site containing audio, video and slides

• Braun D. C. and Lindsey, C. 2002, "Seismic Forecasting of Solar Activity" in Highlights of Astronomy, Vol 12 as presented at the XXIVth General Assembly of the IAU-2000 (Manchester, UK, 7-18 August 2000) ed. H. Rickman, (San Francisco: Astronomical Society of the Pacific), 378. reprint ,

• Braun D. C. and Lindsey, C. 2001, "Seismic Holography of the Solar Interior and Far Side" in Proceedings of IAU Symposium 203, Recent Insights into the Physics of the Sun and Heliosphere - Highlights from SOHO and Other Space Missions, eds. P. Brekke, B. Fleck, and J. B. Gurman, (San Francisco: Astronomical Society of the Pacific), 167. reprint ,

• Lindsey, C. and Braun, D. C. 2000, "Prospects for Deep Interior Helioseismic Holography," The full poster which was presented at the IAU Symposium 203 in Manchester, U.K., August 2000.

• Braun D. C. and Lindsey, C. 2000, "Seismic Imaging of the Far Side and Interior of the Sun," Bul. Amer. Astron. Soc. , 32, 831. full poster , individual figures ,