Brief Bio

Dr. Hong Xie, a solar physicist with CUA, joined Code 671 in April 2003. She has been  working on data analysis of coronal mass ejections (CMEs), CME-driven shocks,   and associated geomagnetic storms. She is currently maintaining the COR1 preliminary   CME catalog. Her research interests include the origin, three-dimensional structure,   and evolution of CMEs. She has developed new analytical CME cone model fitting procedure,  and incorporated a geometrical flux-rope model fitting for STEREO/COR coronagraph images.   In 2009, working with STEREO team, Dr. St. Cyr and Dr. Gopalswamy, by using flux-rope   models and 3D triangulations, she has studied the origin, 3D structure and kinematic   evolution of CMEs near solar minimum using STEREO COR1 and COR2 data. She also improved   the shock prediction technique based on the empirical shock arrival (ESA) model, where   CME deceleration is included in the corrected ESA and synthesized with kilometric   Type II-derived shock velocities. Her recent research focused on SEP onset time,   SEP intensity and their relation to the type II radio burst, CME shock formation time   and speed, the deflection and rotation of CMEs, connection between the structure of   magnetic flux rope in solar source regions: quiescent prominence regions and flare-  producing active regions, CME-Flux Ropes in the extended corona and magnetic clouds   at 1 au.  

Selected Publications

Refereed

Nieves-Chinchilla, T., N. Alzate, H. Cremades, et al. L. Rodríguez-García, L. F. G. Dos Santos, A. Narock, H. Xie, A. Szabo, E. Palmerio, V. Krupar, M. Pulupa, D. Lario, M. L. Stevens, L. B. Wilson, R.-Y. Kwon, M. L. Mays, O. C. St. Cyr, P. Hess, K. K. Reeves, D. B. Seaton, T. Niembro, S. D. Bale, and J. C. Kasper. 2022. "Direct First Parker Solar Probe Observation of the Interaction of Two Successive Interplanetary Coronal Mass Ejections in 2020 November." The Astrophysical Journal 930 (1): 88 [10.3847/1538-4357/ac590b]

Gopalswamy, N., P. Mäkelä, S. Yashiro, S. Akiyama, and H. Xie. 2022. "Solar activity and space weather." Journal of Physics: Conference Series 2214 (1): 012021 [10.1088/1742-6596/2214/1/012021]

Xie, H., N. Gopalswamy, and S. Akiyama. 2021. "The Structural Connection between Coronal Mass Ejection Flux Ropes near the Sun and at 1 au." The Astrophysical Journal 922 (1): 64 [10.3847/1538-4357/ac23cc]

Gopalswamy, N., S. Yashiro, P. Mäkelä, H. Xie, and S. Akiyama. 2021. "The Common Origin of High-energy Protons in Solar Energetic Particle Events and Sustained Gamma-Ray Emission from the Sun." The Astrophysical Journal 915 (2): 82 [10.3847/1538-4357/ac004f]

Vourlidas, A., L. Balmaceda, H. Xie, and O. St. Cyr. 2020. "The Coronal Mass Ejection Visibility Function of Modern Coronagraphs." The Astrophysical Journal 900 (2): 161 [10.3847/1538-4357/abada5]

Dagnew, F., N. Gopalswamy, S. Tassema, et al. A. Umuhire, S. Yashiro, P. Mäkelä, and H. Xie. 2020. "The Shock-Driving Capability of a CME Inferred from Multiwavelength Observations." [10.31401/sungeo.2019.02.02]

Gopalswamy, N., P. Mäkelä, S. Yashiro, et al. S. Akiyama, H. Xie, and N. Thakur. 2020. "Source of Energetic Protons in the 2014 September 1 Sustained Gamma-ray Emission Event." Solar Physics 295 (2): 18 [10.1007/s11207-020-1590-8]

Gopalswamy, N., P. Mäkelä, S. Yashiro, et al. A. Lara, S. Akiyama, and H. Xie. 2019. "On the Shock Source of Sustained Gamma-Ray Emission from the Sun." Journal of Physics: Conference Series 1332 (1): 012004 [10.1088/1742-6596/1332/1/012004]

Xie, H., O. C. St. Cyr, P. Mäkelä, and N. Gopalswamy. 2019. "Statistical Study on Multispacecraft Widespread Solar Energetic Particle Events During Solar Cycle 24." Journal of Geophysical Research: Space Physics 124 (8): 6384-6402 [10.1029/2019ja026832]

Gopalswamy, N., P. Makela, S. Yashiro, et al. A. Lara, H. Xie, S. Akiyama, and R. J. MacDowall. 2019. "Fermi, Wind, and SOHO Observations of Sustained Gamma-Ray Emission from the Sun." 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) [10.23919/ursiap-rasc.2019.8738168]

Gopalswamy, N., P. Mäkelä, S. Yashiro, et al. A. Lara, H. Xie, S. Akiyama, and R. J. MacDowall. 2018. "Interplanetary Type II Radio Bursts from Wind /WAVES and Sustained Gamma-Ray Emission from Fermi /LAT: Evidence for Shock Source." The Astrophysical Journal 868 (2): L19 [10.3847/2041-8213/aaef36]

Xie, H., P. Mäkelä, O. C. St. Cyr, and N. Gopalswamy. 2017. "Comparison of the coronal mass ejection shock acceleration of three widespread SEP events during solar cycle 24." Journal of Geophysical Research: Space Physics 122 (7): 7021-7041 [10.1002/2017ja024218]

Kay, C., N. Gopalswamy, H. Xie, and S. Yashiro. 2017. "Deflection and Rotation of CMEs from Active Region 11158." Solar Physics 292 (6): 78 [10.1007/s11207-017-1098-z]

Gopalswamy, N., S. Yashiro, S. Akiyama, and H. Xie. 2017. "Estimation of Reconnection Flux Using Post-eruption Arcades and Its Relevance to Magnetic Clouds at 1 AU." Solar Physics 292 (4): 65 [10.1007/s11207-017-1080-9]

Lario, D., R.-Y. Kwon, I. G. Richardson, et al. N. E. Raouafi, B. J. Thompson, T. T. Rosenvinge, M. L. Mays, P. A. Mäkelä, H. Xie, H. M. Bain, M. Zhang, L. Zhao, H. V. Cane, A. Papaioannou, N. Thakur, and P. Riley. 2017. "The Solar Energetic Particle Event of 2010 August 14: Connectivity with the Solar Source Inferred from Multiple Spacecraft Observations and Modeling." The Astrophysical Journal 838 (1): 51 [10.3847/1538-4357/aa63e4]

Xie, H., P. Mäkelä, N. Gopalswamy, and O. C. St. Cyr. 2016. "Energy dependence of SEP electron and proton onset times." Journal of Geophysical Research: Space Physics 121 (7): 6168-6183 [10.1002/2015ja021422]

Schmidt, J. M., I. H. Cairns, H. Xie, O. C. St. Cyr, and N. Gopalswamy. 2016. "CME flux rope and shock identifications and locations: Comparison of white light data, Graduated Cylindrical Shell model, and MHD simulations." Journal of Geophysical Research: Space Physics 121 (3): 1886-1906 [10.1002/2015ja021805]

Cremades, H., F. A. Iglesias, O. C. St. Cyr, et al. H. Xie, M. L. Kaiser, and N. Gopalswamy. 2015. "Low-Frequency Type-II Radio Detections and Coronagraph Data Employed to Describe and Forecast the Propagation of 71 CMEs/Shocks." Solar Physics 290 (9): 2455-2478 [10.1007/s11207-015-0776-y]

Kahler, S., N. Gopalswamy, P. Makela, et al. S. Akiyama, S. Yashiro, H. Xie, and N. Thakur. 2015. "Filament Eruptions Outside of Active Regions as Sources of Large Solar Energetic Particle Events." 34th International Cosmic Ray Conference (ICRC2015) 34 48

Xie, H. N., O. C. St Cyr, N. Gopalswamy, D. Odstrcil, and H. Cremades. 2013. "Understanding shock dynamics in the inner heliosphere with modeling and type II radio data: A statistical study." J. Geophys. Res. Space Physics 118 (8): 4711-4723 [10.1002/jgra.50444]

Mäkelä, P., N. Gopalswamy, H. N. Xie, et al. A. Mohamed, S. Akiyama, and S. Yashiro. 2013. "Coronal Hole Influence on the Observed Structure of Interplanetary CMEs." Solar Physics 8 [10.1007/s11207-012-0211-6]

Xie, H. N., D. Odstrcil, L. Mays, et al. O. C. St Cyr, N. Gopalswamy, and H. Cremades. 2012. "Understanding shock dynamics in the inner heliosphere with modeling and Type II radio data: The 2010-04-03 event." Journal of Geophysical Research (Space Physics) 117 4105 [ 10.1029/2011JA017304]

Xie, H. N., N. Gopalswamy, and O. C. St Cyr. 2009. "Modeling and prediction of fast CME/shocks associated with type II bursts." IAU Symposium 257 489-491 [ 10.1017/S1743921309029755]

Gopalswamy, N., P. auml;kelä, H. Xie, S. Akiyama, and S. Yashiro. 2009. "CME interactions with coronal holes and their interplanetary consequences." Journal of Geophysical Research (Space Physics) 114 0 [10.1029/2008JA013686]

Xie, H., O. Gopalswamy, O. Gopalswamy, O. Gopalswamy, and S. Yashiro. 2008. "Effects of solar wind dynamic pressure and preconditioning on large geomagnetic storms." Geophysical Research Letters 35 6 [10.1029/2007GL032298]

Gopalswamy, N., S. Yashiro, S. Akiyama, et al. P. auml;kelä, H. Xie, M. Kaiser, R. Howard, and J. Bougeret. 2008. "Coronal mass ejections, type II radio bursts, and solar energetic particle events in the SOHO era." Annales Geophysicae 26 3033-3047 [ 10.5194/angeo-26-3033-2008]

Kim, K., N. Gopalswamy, and H. Xie. 2008. "Comment on 'Prediction of the 1-AU arrival times of CME-associated interplanetary shocks: Evaluation of an empirical interplanetary shock propagation model'." Journal of Geophysical Research (Space Physics) 113 10105 [10.1029/2008JA013030]

Michalek, G., N. Gopalswamy, and H. Xie. 2007. "Width of Radio-Loud and Radio-Quiet CMEs." Solar Physics 246 409-414 [ 10.1007/s11207-007-9062-y]

Xie, H., N. Gopalswamy, P. Manoharan, et al. A. Lara, S. Yashiro, and S. Lepri. 2006. "Long-lived geomagnetic storms and coronal mass ejections." Journal of Geophysical Research (Space Physics) 111 1103 [10.1029/2005JA011287]

Lara, A., N. Gopalswamy, H. Xie, et al. E. Mendoza-Torres, R. eacute;Rez-EríQuez, and G. Michalek. 2006. "Are halo coronal mass ejections special events?" Journal of Geophysical Research (Space Physics) 111 6107 [10.1029/2005JA011431]

Xie, H., N. Gopalswamy, L. Ofman, et al. G. Michalek, A. Lara, and S. Yashiro. 2006. "Improved input to the empirical coronal mass ejection (CME) driven shock arrival model from CME cone models." Space Weather 4 10002 [10.1029/2006SW000227]

Gopalswamy, N., H. N. Xie, S. Yashiro, and I. Usoskin. 2005. "Coronal Mass Ejections and Ground Level Enhancements." International Cosmic Ray Conference 1 169

Xie, H. N., N. Gopalswamy, P. K. Manoharan, et al. S. Yashiro, A. Lara, and S. Lepri. 2005. "CMEs and Long-Lived Geomagnetic Storms: A Case Study." Coronal and Stellar Mass Ejections 226 475-476 [ 10.1017/S1743921305001092]

Gopalswamy, N., S. Yashiro, G. Michalek, et al. H. Xie, R. Lepping, and R. Howard. 2005. "Solar source of the largest geomagnetic storm of cycle 23." Geophysical Research Letters 32 12 [10.1029/2004GL021639]

Lara, A., N. Gopalswamy, R. Oacute;pez, et al. S. Yashiro, H. Xie, and J. eacute;s-Galicia. 2005. "Coronal Mass Ejections and Galactic Cosmic-Ray Modulation." The Astrophysical Journal 625 441-450 [ 10.1086/428565]