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Flare differentially rotates sunspot on Sun's surface

Credits: NJIT/BBSO/C. Liu

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In the News

  • RHESSI Science Nugget (07/31/20): SOL2013-11-10 Eruptive Circular-ribbon Flare with Extended Remote Brightenings

  • RHESSI Science Nugget (10/24/16): Flare-induced Impulsive Sunspot Rotation caught in High Resolution

  • NJIT Press Release (10/11/16): The Sun's Coronal Tail Wags its Photospheric Dog
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  • HMI Science Nugget (10/27/14): Surface and Coronal Field Signatures of Implosions in Two Homologous Solar Flares

  • RHESSI Science Nugget (11/20/06): Ribbon-like hard X-ray source





























(c) Chang Liu 2021 All Rights Reserved

Chang Liu conducted extensive solar physics research, focusing on flare-related changes in magnetic fields and sunspot structures, circular-ribbon flares, hard X-ray imaging and spectroscopy, and solar flare forecasting. His work also covered a range of other topics, including jets, D3 flares, sigmoids, Moreton waves, and microflares. As the principal investigator, he led six federal grants and, in mid-2021, transferred two new PI federal grants to colleagues as he pursued a new career path.


Full List of Chang Liu's Publications in Solar Physics at ADS Public Library



Circular-ribbon Flares:

  • Liu, C., Prasad, A., Lee, J., & Wang, H. 2020, An Eruptive Circular-ribbon Flare with Extended Remote Brightenings, ApJ, 899, 34

  • Liu, C., Lee, J., & Wang, H. 2019, The Eruption of Outer Spine-Like Loops Leading to A Double-Stage Circular-Ribbon Flare, ApJ, 883, 47

  • Liu, C., Deng, N., Liu, R., Lee, J., Pariat, E., Wiegelmann, T., Liu, Y., Kleint, L., & Wang, H. 2015, A Circular-ribbon Solar Flare Following an Asymmetric Filament Eruption, ApJ Letters, 812, L19


Flare-related Changes in Magnetic Field and Sunspot Structure:

  • Liu, C., Cao, W., Chae, J., Ahn, K., Choudhary, D. P., Lee, J., Liu, R., Deng, N., Wang, J., & Wang, H. 2018, Evolution of Photospheric Vector Magnetic Field Associated with Moving Flare Ribbons as Seen by GST, ApJ, 869, 21

  • Liu, C., Xu, Y., Cao, W., Deng, N., Lee, J., Hudson, H.S., Gary, D.E., Wang, J., Jing, J., & Wang, H. 2016, Flare differentially rotates sunspot on Sun's surface, Nature Communications, 7, 13104 [ADS]

  • Liu, C., Deng, N., Lee J., Wiegelmann, T., Jiang C., Dennis B. R., Su Y., Donea A. & Wang H. 2014, Three-dimensional Magnetic Restructuring in Two Homologous Solar Flares in the Seismically Active NOAA AR 11283, ApJ, 795, 128

  • Liu, C., Deng N., Lee, J., Wiegelmann T., Moore, R.L., & Wang, H. 2013, Evidence for Solar Tether-cutting Magnetic Reconnection from Coronal Field Extrapolations, ApJ Letters, 778, L36(7pp)

  • Liu, C., Deng, N., Liu, R., Lee, J., Wiegelmann, T., Jing, J., Xu, Y., Wang, S. & Wang, H. 2012, Rapid Changes of Photospheric Magnetic Field After Tether-cutting Reconnection and Magnetic Implosion, ApJ Letters, 745, L4

  • Liu, C., Deng, N., Liu, Y., Falconer, D., Goode, P. R., Denker, C. & Wang, H. 2005, Rapid Change of Delta Spot Structure Associated with Seven Major Flares, ApJ, 622, 722


Solar Flare Forecasting:

  • Liu, C., Deng, N., Wang, J. T.L., & Wang, H. 2017, Predicting Solar Flares Using SDO/HMI Vector Magnetic Data Product and Random Forest Algorithm, ApJ, 843, 104


Hard X-ray Imaging and Spectroscopy:

  • Liu, C., Lee, J., Jing, J., Liu, R., Deng, N. & Wang, H. 2010, Motions of Hard X-ray Sources During an Asymmetric Eruption, ApJ Letters, 721, L193

  • Liu, C. & Wang, H. 2009, Reconnection Electric Field and Hardness of X-ray Emission of Solar Flares, ApJ Letters, 696, L27

  • Liu, C., Lee, J., Jing, J., Gary, D. E. & Wang, H. 2008, The Spatial Distribution of Hard X-Ray Spectral Index and Local Magnetic Reconnection Rate, ApJ Letters, 672, L69

  • Liu, C., Lee, J., Gary, D. E. & Wang, H. 2007, The Ribbon-Like Hard X-Ray Emission in a Sigmoidal Solar Active Region, ApJ Letters, 658, L127 (Also see RHESSI Science Nuggets #40; RHESSI's Tenth Anniversary)


Miscellaneous:

  • Liu, C., Xu, Y., Deng, N., Lee, J., Zhang, J., Choudhary, D. P. & Wang, H. 2013, He I D3 Observation of the 1984 May 22 M6.3 Solar Flare, ApJ, 774, 60(9pp)

  • Liu, C., Deng, N., Liu, R., Ugarte-Urra, I., Wang, S. & Wang, H. 2011, A Standard-to-Blowout Jet, ApJ Letters, 735, L18

  • Liu, C., Lee, J., Karlicky, M., Choudhary, D. P., Deng, N. & Wang, H. 2009, The Successive Solar Flares and Coronal Mass Ejections on 2005 September 13, ApJ, 703, 757

  • Liu, C., Lee, J., Yurchyshyn, V., Deng, N., Cho, K., Karlicky, M. & Wang, H. 2007, The Eruption from a Sigmoidal Solar Active Region on 2005 May 13, ApJ, 669, 1372

  • Liu, C., Lee, J., Deng, N., Gary, D. E. & Wang, H. 2006, Large-Scale Activities Associated with the 2003 October 29 X10 Flare, ApJ, 642, 1205

  • Liu, C., Qiu, J., Gary, D. E., Krucker, S. & Wang, H. 2004, Studies of Microflares in RHESSI Hard X-ray, Big Bear Solar Observatory H-alpha and Michelson Doppler Imager Magnetograms, ApJ, 604, 442

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