Sciences and Exploration Directorate

Tongjiang Wang

(ASTROPHYSICIST)

Tongjiang Wang's Contact Card & Information.
Email: tongjiang.wang@nasa.gov
Phone: 301.286.4168
Org Code: 671
Address:
NASA/GSFC
 Mail Code 671
 Greenbelt, MD 20771
Employer: CATHOLIC UNIV OF AMERICA

Brief Bio

Dr. Wang has joined GSFC/HSD since 2007 after completing several postdoctoral positions in solar physics such as Kyoto University, Max Planck Institute, and Montana State University. Dr. Wang received his PhD from National Astronomical Observatories, Chinese Academy of Science in 1998. His scientific interests cover a broad range of topics from AR magnetic field evolution, solar activities (jets, flares, and CMEs), coronal waves and flows, to reconstruction of 3D coronal electron density models by tomography.


Dr. Wang's research is focused on data analysis using EUV spectroscopic and imaging observations from various space missions (e.g. Yohkoh, SOHO, TRACE, STEREO, Hinode, SDO, etc) in combination with theoretical studies. He is specialized in MHD waves in coronal loops with well-recoganized achievements contributing to coronal seismology in observations, theory, and numerical simulations.


Dr. Wang has published more than 75 publications on solar physics in refereed journals that were received nearly 5000 citations, and he has an h-index of 39. A full publication list is available. He served as a referee for various leading journals in the field such as ApJ, A&A, Solar Phys, JGR, PASJ, ASR, RAA, New Astron., Frontiers, etc.

 

Research Interests

Oscillations and waves in coronal loops

Heliophysics: Solar Atmosphere

Imaging and spectral detections of various kinds of waves and oscillation modes, measurement of their physical properties, understanding their excitation, propagation and damping mechanism by MHD simulations as well as exploration of their possible applications in coronal seismology, i.e., to determine the unknown physical parameters based on the observations and theories.
 

Impulsive activity in solar corona

Heliophysics: Solar Atmosphere

Magnetic energy buildup and release mechanisms for impulsive events from small scale (e.g., jets and microflares) to large scale (e.g., filament eruption, flares and CMEs). Search of the evidence for magnetic energy transfer from the photosphere into the corona (e.g. formation of filaments seen in Hα and EUV, and sigmoid structure in soft X-ray). Exploration of their trigger mechanism by comparing observational signatures with the model prediction. Exploration of the evidence for magnetic reconnection including changes of coronal magnetic structure and topology and the direct detection of magnetic reconnection inflow and outflows using the multi-wavelength observations. Measurement of physical properties (e.g., temperature and density) of coronal structure from EUV spectral data and diagnosis of their heating and cooling processes.

Magnetic field evolution in active regions

Heliophysics: Solar Atmosphere

Exploration of the responses of the coronal structure and emissions in EUV and X-rays to the photospheric magnetic field evolution such as the roles of magnetic emergence, flux cancellation, shear motion etc.
 

Reconstruction of the Electron Density Distribution in the Solar Corona

Heliophysics: Solar Atmosphere

To reconstruct the 3D electron density distribution for each solar rotation since 2007 using the spherically symmetric inversion method from two week's polarized brightness (pB) radiance using STEREO/COR1 observations.To study long-term and short-term variations of the electron density of the inner corona within 1.5-4 solar radii and their relationship with the evolution of the magnetic flux on the photosphere and the CME mass and occurrance rate.

Positions/Employment

Research Associate

Catholic University of America , Physics Department - 620 Michigan Ave., NE, Room 200 Hannan Hall, Washington, DC 20064, and NASA Goddard Space Flight Center at Greenbelt, MD 2077

May 2007 - Present

Research scientist

Physics Department of Montana State University - Bozeman, MT 59717-3840

January 2006 - April 2007

Postdoctoral Researcher

Max-Planck Institute for Sonnensystemforschung - Katlenburg-Lindau, Germany

June 2001 - December 2005

Postdoctoral Fellowship

Kwasan Observatory, Kyoto University - Kyoto, Japan

June 2000 - March 2001

Associate Research Professor

Chinese National Astronomical Observatories - Beijing, China

March 2000 - May 2000

Assistant researcher

Chinese National Astronomical Observatories - Beijing, China

March 1998 - March 2000

Education

1987,9-1991,9 Astrophysics, Astronomy Dept., Nanjing University, B.S.
1991,9-1994,9 Astrophysics, Astronomy Dept., Nanjing University, M.S.
1994,9-1998,3 Astrophysics, Beijing Astronomical Observatory,Chinese Academy of Sciences, Ph.D.
 

Publications

Refereed

2017. "Variation of Coronal Activity from the Minimum to Maximum of Solar Cycle 24 using Three Dimensional Coronal Electron Density Reconstructions from STEREO/COR1." Solar Physics 292 (8): 97 (32 pp) [10.1007/s11207-017-1130-3] [Journal Article/Letter]

2017. "Detection and Interpretation of Long-lived X-Ray Quasi-periodic Pulsations in the X-class Solar Flare on 2013 May 14." The Astrophysical Journal 836 (1): 84 [10.3847/1538-4357/836/1/84] [Journal Article/Letter]

2016. "GLOBAL SAUSAGE OSCILLATION OF SOLAR FLARE LOOPS DETECTED BY THEINTERFACE REGION IMAGING SPECTROGRAPH." The Astrophysical Journal 823 (1): L16 [10.3847/2041-8205/823/1/l16] [Journal Article/Letter]

2016. "Simultaneous Near-Sun Observations of a Moving Type IV Radio Burst and the Associated White-Light Coronal Mass Ejection." Solar Physics 291 (5): 1405-1416 [10.1007/s11207-016-0918-x] [Journal Article/Letter]

2016. "Waves in Solar Coronal Loops." Keiling/Low-Frequency Waves in Space Plasmas 216 395-418 [10.1002/9781119055006.ch23] [Article in Book]

2015. "EVIDENCE OF THERMAL CONDUCTION SUPPRESSION IN A SOLAR FLARING LOOP BY CORONAL SEISMOLOGY OF SLOW-MODE WAVES." The Astrophysical Journal 811 (1): L13 [10.1088/2041-8205/811/1/l13] [Journal Article/Letter]

2014. "AN ESTIMATE OF THE MAGNETIC FIELD STRENGTH ASSOCIATED WITH A SOLAR CORONAL MASS EJECTION FROM LOW FREQUENCY RADIO OBSERVATIONS." The Astrophysical Journal 796 (1): 56 [10.1088/0004-637x/796/1/56] [Journal Article/Letter]

2014. "SOLAR MAGNETIZED TORNADOES: ROTATIONAL MOTION IN A TORNADO-LIKE PROMINENCE." The Astrophysical Journal 785 (1): L2 [10.1088/2041-8205/785/1/l2] [Journal Article/Letter]

2014. "Validation of Spherically Symmetric Inversion by Use of a Tomographically Reconstructed Three-Dimensional Electron Density of the Solar Corona." SOLAR PHYSICS 289 3723-3745 [10.1007/s11207-014-0556-0] [Journal Article/Letter]

2013. "LOW-FREQUENCY OBSERVATIONS OF DRIFTING, NON-THERMAL CONTINUUM RADIO EMISSION ASSOCIATED WITH THE SOLAR CORONAL MASS EJECTIONS." The Astrophysical Journal 778 (1): 30 [10.1088/0004-637x/778/1/30] [Journal Article/Letter]

2013. "Imaging coronal magnetic-field reconnection in a solar flare." Nature Physics 9 (8): 489-493 [10.1038/nphys2675] [Journal Article/Letter]

2013. "GLOBAL CORONAL SEISMOLOGY IN THE EXTENDED SOLAR CORONA THROUGH FAST MAGNETOSONIC WAVES OBSERVED BY STEREO SECCHI COR1." ASTROPHYSICAL JOURNAL 776 [10.1088/0004-637X/776/1/55] [Journal Article/Letter]

2013. "THREE-DIMENSIONAL MAGNETOHYDRODYNAMIC MODELING OF PROPAGATING DISTURBANCES IN FAN-LIKE CORONAL LOOPS." ASTROPHYSICAL JOURNAL LETTERS 775 [10.1088/2041-8205/775/1/L23] [Journal Article/Letter]

2012. "PERSISTENT DOPPLER SHIFT OSCILLATIONS OBSERVED WITH HINODE /EIS IN THE SOLAR CORONA: SPECTROSCOPIC SIGNATURES OF ALFVÉNIC WAVES AND RECURRING UPFLOWS." The Astrophysical Journal 759 (2): 144 [10.1088/0004-637x/759/2/144] [Journal Article/Letter]

2012. "SOLAR MAGNETIZED “TORNADOES:” RELATION TO FILAMENTS." The Astrophysical Journal 756 (2): L41 [10.1088/2041-8205/756/2/l41] [Journal Article/Letter]

2012. "OBSERVATIONS OF A TWO-STAGE SOLAR ERUPTIVE EVENT (SEE): EVIDENCE FOR SECONDARY HEATING." The Astrophysical Journal 746 (1): L5 [10.1088/2041-8205/746/1/l5] [Journal Article/Letter]

2012. "Growing Transverse Oscillations of a Multistranded Loop Observed by SDO/AIA." The Astrophysical Journal Letters 751 ( 2): L27 [10.1088/2041-8205/751/2/L27] [Journal Article/Letter]

2012. "Propagating Intensity Disturbances in Fan-like Coronal Loops: Flows or Waves?." 4th Hinode Science Meeting: Unsolved Problems and Recent Insights 455 227- [Journal Article/Letter]

2012. "Spectroscopic Diagnosis of Propagating Disturbances in Coronal Loops: Waves or flows?." Fifth Hinode Science Meeting 456 91- [Journal Article/Letter]

2012. "Slow Magnetosonic Waves and Fast Flows in Active Region Loops." The Astrophysical Journal 754 [111-10.1088/0004-637X/754/2/111] [Journal Article/Letter]

2011. "UNDERFLIGHT CALIBRATION OF SOHO /CDS AND HINODE /EIS WITH EUNIS-07." The Astrophysical Journal Supplement Series 197 (2): 32 [10.1088/0067-0049/197/2/32] [Journal Article/Letter]

2011. "Observing the reconnection region in a transequatorial loop system." Res. Astron. Astrophys. 11 (10): 1209-1228 [10.1088/1674-4527/11/10/009] [Journal Article/Letter]

2011. "Standing Slow-Mode Waves in Hot Coronal Loops: Observations, Modeling, and Coronal Seismology." Space Sci Rev 158 (2-4): 397-419 [10.1007/s11214-010-9716-1] [Journal Article/Letter]

2010. "A RECONNECTING CURRENT SHEET IMAGED IN A SOLAR FLARE." The Astrophysical Journal 723 (1): L28-L33 [10.1088/2041-8205/723/1/l28] [Journal Article/Letter]

2010. "ABSOLUTE RADIOMETRIC CALIBRATION OF THE EUNIS-06 170-205 Å CHANNEL AND CALIBRATION UPDATE FOR CORONAL DIAGNOSTIC SPECTROMETER/NORMAL-INCIDENCE SPECTROMETER." The Astrophysical Journal Supplement Series 186 (2): 222-232 [10.1088/0067-0049/186/2/222] [Journal Article/Letter]

2009. "Hinode/EIS observations of propagating low-frequency slow magnetoacoustic waves in fan-like coronal loops." A&A 503 (3): L25-L28 [10.1051/0004-6361/200912534] [Journal Article/Letter]

2009. "EPISODIC X-RAY EMISSION ACCOMPANYING THE ACTIVATION OF AN ERUPTIVE PROMINENCE: EVIDENCE OF EPISODIC MAGNETIC RECONNECTION." The Astrophysical Journal 698 (1): 632-640 [10.1088/0004-637x/698/1/632] [Journal Article/Letter]

2009. "PROPAGATING SLOW MAGNETOACOUSTIC WAVES IN CORONAL LOOPS OBSERVED BY HINODE /EIS." The Astrophysical Journal 696 (2): 1448-1460 [10.1088/0004-637x/696/2/1448] [Journal Article/Letter]

2008. "Identification of different types of kink modes in coronal loops: principles and application to TRACE results." A&A 489 (3): 1307-1317 [10.1051/0004-6361:200810230] [Journal Article/Letter]

2008. "Analytic approximate seismology of transversely oscillating coronal loops." A&A 484 (3): 851-857 [10.1051/0004-6361:200809728] [Journal Article/Letter]

2008. "Hinode observations of transverse waves with flows in coronal loops." A&A 482 (2): L9-L12 [10.1051/0004-6361:20079340] [Journal Article/Letter]

Non-Refereed

2015. "Evidence of thermal conduction suppression in hot coronal loops: supplementary results." Proceedings of the International Astronomical Union 11 (S320): 202-208 [10.1017/s1743921316000326] [Journal Article/Letter]

2012. "Slow-Mode Oscillations of Hot Loops Excited at Flaring Footpoints." The Fifth Hinode Science Meeting. ASP Conference Series, Astronomical Society of the Pacific 456 127 [Proceedings]

2009. "Direct Observation of High-Speed Reconnection Outflows With SOHO/SUMER, TRACE and RHESSI." The Second Hinode Science Meeting: Beyond Discovery-Toward Understanding ASP Conference Series, Astronomical Society of the Pacific 415 447 [Proceedings]

2009. "Hinode/EIS Observations of Propagating Slow Magnetoacoustic Waves in a Coronal Loop." Proceeding of the Second Hinode Science Meeting: Beyond Discovery-Toward Understanding, ASP Conference Series, Astronomical Society of the Pacific 415 28 [Proceedings]

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Project Support Specialist
301-286-6066
jocelyn.m.lynch@nasa.gov
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301-286-6066
ellen.e.jeffries@nasa.gov

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