Ue-Li Pen

Ue-Li Pen profile picture
Academia Sinica Institute
Areas of research:
I am a global leader of the young and rapidly growing field of 21cm cosmology. The achievements of my 17 years of tenure since 2004 resulted in several dedicated telescopes, including CHIME. Since this field has gained substantial momentum of its own, I have now shifted my focus to the next growth potential: pulsar VLBI scintillometry. It is starting to receive initial international attention, as reflected by the T.D.Lee centre appointment as visiting professor and NAOC appointment as FAST fellow. My research interests cover a broad range of theoretical and observational astrophysics, and data analysis from 21cm cosmology to coherent radiation from fast radio bursts and pulsars. Various tools are utilized for my research on Cosmology, FRBs, and Pulsars, including N-body and fluid simulations (including the recent world's largest 3 trillion particle simulation on the PI wall) and radio telescopes such as CHIME and the Algonquin Radio Observatory (ARO).
  • Director, Academia Sinica Institute of Astronomy & Astrophysics, 2021 Fall
  • Director, CITA, 2016-2019
  • Professor, CITA, 2011-Present
  • Associate Professor, CITA, 2003-2011
  • Assistant Professor, CITA, 1998-2003
  • Junior Fellow, Harvard University, 1995-1998
  • Lancelot Berkeley Prize (Shared)
  • Governor-General"s Innovation Awards (2020) (shared with the CHIME collaboration)
  • 1/347 share of EHT breakthrough prize
  • Simons Research Award (deferred from 2019 due to admin duties).
  • Humboldt Research Award - Alexander von Humboldt-Stiftung - 89,603, Humboldt Foundation, Prize / Award, The award is valued at euro 60,000.
  • VR Marthi, D Simard, RA Main, UL Pen, MH van Kerkwijk, K Vanderlinde, Y Gupta, C Roberts, BM Quine.(2021). Scintillation of PSR B1508+ 55-the view from a 10 000-km baseline. Monthly Notices of the Royal Astronomical Society. Volume 506, Issue 4, Pages 5160-5169
  • Janssen, M., Falcke, H., Kadler, M. et al. Event Horizon Telescope observations of the jet launching and collimation in Centaurus A. Nat Astron (2021). https://doi.org/10.1038/s41550-021-01417-w
  • Robert Main, Rebecca Lin, Marten H. van Kerkwijk, Ue-Li Pen, Alexei G. Rudnitskii, Mikhail V. Popov, Vladimir A. Soglasnov, and Maxim Lyutikov.(2021).Resolving the Emission Regions of the Crab Pulsar's Giant Pulses. The Astrophysical Journal, Volume 915, Number 1
  • Ramesh Narayan et al.(2021). The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole.The Astrophysical Journal, Volume 912, Number 1
  • Pavel Motloch, Hao-Ran Yu, Ue-Li Pen, Yuanbo Xie(2021) An observed correlation between galaxy spins and initial conditions. NATURE ASTRONOMY. Volume 5, Issue 5, Pages 520-521
  • JC Algaba, J Anczarski, K Asada, M Baloković, S Chandra, Y-Z Cui, AD Falcone, M Giroletti, C Goddi, K Hada, et al.(2021).Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign. The Astrophysical journal letters. Volume 911, Issue 1, Page L11
  • Robert Wharton, Suryarao Bethapudi, Tasha Gautam, Dongzi Li, Hsiu-Hsien Lin, Robert Main, Viswesh Marthi, Laura Spitler, Ue-Li Pen.(2021). uGMRT detection of a persistent radio source coincident with FRB20201124A. The Astronomer's Telegram. Volume 14529, Page 1
  • Kazunori Akiyama, Juan Carlos Algaba, Antxon Alberdi, Walter Alef, Richard Anantua, Keiichi Asada, Rebecca Azulay et al.(2021). First M87 Event Horizon Telescope Results. VII. Polarization of the Ring. The Astrophysical Journal Letters. Volume 910, Issue 1, Page L12
  • Ciriaco Goddi, Iván Martí-Vidal, Hugo Messias, Geoffrey C Bower, Avery E Broderick, Jason Dexter, Daniel P Marrone, et al.(2021) Polarimetric properties of Event Horizon Telescope targets from ALMA. The Astrophysical Journal Letters. Volume 910, Issue 1, Page L14
  • O Wucknitz, LG Spitler, U-L Pen. (2021) Cosmology with gravitationally lensed repeating fast radio bursts. Astronomy & Astrophysics. Volume 645, Page A44.
  • Thomas Essinger-Hileman, Trevor Oxholm, Gage Siebert, Peter Ade, Christopher Anderson, et al. (2020) Optical design of the experiment for cryogenic large-aperture intensity mapping (EXCLAIM) International Society for Optics and Photonics. Volume 11453, Page 114530H
  • JiXia Li, ShiFan Zuo, FengQuan Wu, YouGang Wang, JuYong Zhang, ShiJie Sun, YiDong Xu, et al.(2020)The Tianlai Cylinder Pathfinder array: System functions and basic performance analysis. SCIENCE CHINA Physics, Mechanics & Astronomy.Volume 63,Issue 12, Page 1-27
  • The CHIME/FRB Collaboration. (2020)A bright millisecond-duration radio burst from a Galactic magnetar. Nature, Volume 587, Issue 7832, p.54-58. DOI: 10.1038/s41586-020-2863-y
  • Visweshwar Ram Marthi, Tasha Gautam, DZ Li, Hsiu-Hsien Lin, RA Main, A Naidu, Ue-Li Pen, RS Wharton. (2020) Detection of 15 bursts from the fast radio burst 180916. J0158+ 65 with the upgraded Giant Metrewave Radio Telescope. Monthly Notices of the Royal Astronomical Society: Letters. Volume 499, Issue 1, Page L16-L20
  • Jow, Dylan L; Foreman, Simon; Pen, Ue-Li ; Zhu, Wei.(2020).Wave effects in the microlensing of pulsars and FRBs by point masses. Monthly Notices of the Royal Astronomical Society, Volume 497, Issue 4, pp.4956-4969. DOI" 10.1093/mnras/staa2230
  • Dimitrios Psaltis, Lia Medeiros, Pierre Christian, Feryal Özel, Kazunori Akiyama, Antxon Alberdi, et al.(2020) Gravitational test beyond the first post-Newtonian order with the shadow of the M87 black hole. Physical review letters. Volume 125, Issue 14, Page 141104
  • Wielgus, Maciek; Akiyama, Kazunori ; Blackburn, Lindy; Chan, Chi-kwan et al. (2020). Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope.The Astrophysical Journal, Volume 901, Issue 1, id.67, 28 pp. DOI: 10.3847/1538-4357/abac0d
  • Laura C Keating, Ue-Li Pen. (2020) Exploring the dispersion measure of the Milky Way halo.Monthly Notices of the Royal Astronomical Society: Letters. Volume 496, Issue 1, Page L106-L110.
  • Roman Gold, Avery E Broderick, Ziri Younsi, Christian M Fromm, Charles F Gammie, et al. Verification of radiative transfer schemes for the EHT.The Astrophysical Journal. Volume 897, Issue 2, Page 148
  • J-Y Kim, TP Krichbaum, AE Broderick, M Wielgus, L Blackburn, JL Gomez, MD Johnson, KL Bouman et al.(2020) VizieR Online Data Catalog: 3C 279 Event Horizon Telescope imaging (Kim+, 2020) VizieR Online Data Catalog. Page J/A+ A/640/A69
  • Event Horizon Telescope Collaboration. (2020). THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope. The Astrophysical Journal. 897(2). http://dx.doi.org/10.3847/1538-4357/ab91a4
  • Amiri, M., Andersen, B., Bandura, K. et al. Periodic activity from a fast radio burst source. Nature 582, 351-355 (2020). https://doi.org/10.1038/s41586-020-2398-2
  • Keating, Laura C.; Pen, Ue-Li. (2020). Exploring the dispersion measure of the Milky Way Halo. Monthly Notices of the Royal Astronomical Society: Letters. 496(1): 106-110.
  • Yu, Hao-Ran; Motloch, Pavel; Pen, Ue-Li; Yu, Yu; Wang, Huiyuan; Mo, Houjun; Yang, Xiaohu; Jing, Yipeng. (2020). Probing Primordial Chirality with Galaxy Spins. Physical Review Letters. 124(10). http://dx.doi.org/10.1103/PhysRevLett.124.101302
  • Fonseca, E.; Andersen, B. C.; Bhardwaj, M.; Chawla, P.; Good, D. C.; Josephy, A.; Kaspi, V. M.; Masui,K. W.; Mckinven, R.; Michilli, D.; Pleunis, Z.; Shin, K.; Tendulkar, S. P.; Bandura, K. M.; Boyle, P. J.; Brar,C.; Cassanelli, T.; Cubranic, D.; Dobbs, M.; Dong, F. Q. Gaensler, B. M.; Hinshaw, G.; Landecker, T.L.; Leung, C.; Li, D. Z.; Lin, H. -H.; Mena-Parra, J.; Merryfield, M.; Naidu, A.; Ng, C.; Patel, C.; Pen, U.; Rafiei-Ravandi, M.; Rahman, M.; Ransom, S. M.; Scholz, P.; Smith, K. M.; Stairs, I. H.; Vanderlinde, K.; Yadav, P.; Zwaniga, A. V. (2020). Nine New Repeating Fast Radio Burst Sources from CHIME/FRB. The Astrophysical Journal Letters. 891(1) http://dx.doi.org/10.3847/2041-8213/ab7208
  • Marcote, B.; Nimmo, K.; Hessels, J. W. T.; Tendulkar, S. P.; Bassa, C. G.; Paragi, Z.; Keimpema, A.; Bhardwaj, M.; Karuppusamy, R.; Kaspi, V. M.; Law, C. J.; Michilli, D.; Aggarwal, K.; Andersen, B.; Archibald, A. M.; Bandura, K.; Bower, G. C.; Boyle, P. J.; Brar, C.; Burke-Spolaor, S. Butler, B. J.; Cassanelli, T.; Chawla, P.; Demorest, P.; Dobbs, M.; Fonseca, E.; Giri, U.; Good, D. C.; Gourdji, K.; Josephy, A.; Kirichenko, A. Yu.; Kirsten, F.; Landecker, T. L.; Lang, D.; Lazio, T. J. W.; Li, D. Z.; Lin, H. -H.; Linford, J. D.; Masui, K.; Mena-Parra, J.; Naidu, A.; Ng, C.; Patel, C.; Pen, U. -L.; Pleunis, Z.; Rafiei-Ravandi, M.; Rahman, M.; Renard, A.; Scholz, P.; Siegel, S. R.; Smith, K. M.; Stairs, I. H.; Vanderlinde, K.; Zwaniga, A. V. (2020). A repeating fast radio burst source localized to a nearby spiral galaxy. Nature. 577(7789): 190-194. http://dx.doi.org/10.1038/s41586-019-1866-z
  • Ade, P. A. R.; Anderson, C. J.; Barrentine, E. M.; Bellis, N. G.; Bolatto, A. D.; Breysse, P. C.; Bulcha, B.T.; Cataldo, G.; Connors, J. A.; Cursey, P. W.; Ehsan, N.; Grant, H. C.; Essinger-Hileman, T. M.; Hess, L. A.; Kimball, M. O.; Kogut, A. J.; Lamb, A. D.; Lowe, L. N.; Mauskopf, P. D.; McMahon, J. Mirzaei, M.; Moseley, S. H.; Mugge-Durum, J. W.; Noroozian, O.; Pen, U.; Pullen, A. R.; Rodriguez, S.; Shirron, P. J.; Somerville, R. S.; Stevenson, T. R.; Switzer, E. R.; Tucker, C.; Visbal, E.; Volpert, C. G.; Wollack, E. J.; Yang, S. (2020). The Experiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM). Journal of Low Temperature Physics. http://dx.doi.org/10.1007/s10909-019-02320-5
  • Ue-Li Pen. (2018). The nature of fast radio bursts. Nature Astronomy. 2: 842-844.
  • Roy, Jayanta; Chengalur, Jayaram N.; Pen, Ue-Li. (2018). A Post-correlation Beamformer for Time-domain Studies of Pulsars and Transients. The Astrophysical Journal. 864(2): 161-169.
  • Zhu, Hong-Ming; Pen, Ue-Li; Yu, Yu; Chen, Xuelei. (2016). Recovering lost 21 cm radial modes via cosmic tidal reconstruction. Physical Review D. 98(4): id.043511.
  • Yu, Hao-Ran; Pen, Ue-Li; Wang, Xin. (2018). CUBE: An Information-optimized Parallel Cosmological Nbody Algorithm. The Astrophysical Journal Supplement Series. 237(2): id 24.
  • The CHIME/FRB Collaboration. (2018). The CHIME Fast Radio Burst Project: System Overview.The Astrophysical Journal. 863(1): id.48.
  • Zhu, Hong-Ming; Pen, Ue-Li; Yu, Yu; Chen, Xuelei. (2018). Recovering lost 21 cm radial modes via cosmic tidal reconstruction. Physical Review D. 98(4): id.043511.
  • The Event Horizon Telescope Collaboration. (2019). The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project. The Astrophysical Journal. 244(2): id.26. http://dx.doi.org/10.3847/1538-4365/ab29fd
  • Inman, Derek; Pen, Ue-Li; Villaescusa-Navarro, Francisco. (2019). Dipole distortions in the intergalactic medium. Monthly Notices of the Royal Astronomical Society. 487(3): 4181-4189.http://dx.doi.org/10.1093/mnras/stz1542
  • Li, Dongzi; Zhu, Hong-Ming; Pen, Ue-Li. Cross-correlation of the kinematic Sunyaev-Zel'dovich effect and 21 cm intensity mapping with tidal reconstruction. Physical Review Research. 100(2): id.023517.http://dx.doi.org/10.1103/PhysRevD.100.023517
  • Kodwani, Darsh; Meerburg, P. Daniel; Pen, Ue-Li; Wang, Xin. (2019). Initial conditions of the Universe: A sign of the sine mode. Physical Review Research. 99(12): id.123518. http://dx.doi.org/10.1103/PhysRevD.99.123518
  • Yu, Hao-Ran; Pen, Ue-Li; Wang, Xin. (2019). Parity-odd neutrino torque detection. Physical Review Research. 99(12): id.123532.http://dx.doi.org/10.1103/PhysRevD.99.123532
  • Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi;Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Balokovi?, Mislav; Barrett, John; and 339 coauthors.(2019). First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole. The Astrophysical Journal Letters. 875(1): id. L1.
  • Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Balokovi?, Mislav; Barrett, John; and 205 coauthors.(2019). First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole.The Astrophysical Journal Letters. 875(7): id L6. ,
  • Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Balokovi?, Mislav; Barrett, John; and 332 coauthors. (2019). First M87 Event Horizon Telescope Results. II. Array and Instrumentation.The Astrophysical Journal Letters. 875(1): id. L2. ,
  • Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Balokovi?, Mislav; Barrett, John; and 208 coauthors.(2019). First M87 Event Horizon Telescope Results. III. Data Processing and Calibration. The Astrophysical Journal Letters. 75(1): id. L3. ,
  • Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Balokovi?, Mislav; Barrett, John; and 206 coauthors.(2019). First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole. The Astrophysical Journal Letters. 875(7): id. L4.
  • Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Balokovi?, Mislav; Barrett, John; and 212 coauthors.(2019). First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring. The Astrophysical Journal Letters. 875(7): id. L5.
  • Li, Dongzi; Lin, Fang Xi; Main, Robert; Pen, Ue-Li; van Kerkwijk, Marten H.; Yang, I.-Sheng. (2019).Constraining magnetic fields through plasma lensing: application to the Black Widow pulsar. Monthly Notices of the Royal Astronomical Society. 484(4): 5723-5733.
  • Hong-Ming Zhu, Tian-Xiang Mao, Ue-Li Pen(2021).Cosmic Tidal Reconstruction with Halo Fields.arXiv: 2108.01575
  • VR Marthi, S Bethapudi, RA Main, H-H Lin, LG Spitler, RS Wharton, DZ Li, TG Gautam, U-L Pen, GH Hilmarsson.(2021). Burst properties of the highly active FRB 20201124A using uGMRT.arXiv: 2108.00697
  • Artem Tuntsov, Ue-Li Pen, Mark Walker.(2021). Down-drifting, bandwidth and beaming of fast radio bursts. arXiv: 2107.13549
  • FRB Collaboration.(2021). Sub-second periodicity in a fast radio burst. arXiv: 2107.08463
  • Tomas Cassanelli, Calvin Leung, Mubdi Rahman, Keith Vanderlinde, Juan Mena-Parra, Savannah Cary, Kiyoshi W Masui, Jing Luo, Hsiu-Hsien Lin, Akanksha Bij, Ajay Gill, Daniel Baker, Kevin Bandura, Sabrina Berger, Patrick J Boyle, Charanjot Brar, Shami Chatterjee, Davor Cubranic, Matt Dobbs, Emmanuel Fonseca, Deborah C Good, Jane F Kaczmarek, Victoria K Kaspi, Thomas L Landecker, Adam E Lanman, Dongzi Z Li, James W MacKee, Bradley W Meyers, Daniele Michilli, Arun Naidu, Cherry Ng, Chitrang Patel, Aaron B Pearlman, Ue-Li P Pen, Ziggy Pleunis, Brendan Quine, Andre Renard, Pranav Sanghavi, Kendrick M Smith, Ingrid Stairs, Shriharsh P Tendulkar.(2021). Localizing FRBs through VLBI with the Algonquin Radio Observatory 10-m Telescope. arXiv: 2107.05659
  • FRB Collaboration.(2021). The First CHIME/FRB Fast Radio Burst Catalog. arXiv: 2106.04352.
  • Akanksha Bij, Hsiu-Hsien Lin, Dongzi Li, Marten H van Kerkwijk, Ue-Li Pen, Wenbin Lu, Robert Main, Jeffrey B Peterson, Brendan Quine, Keith Vanderlinde.(2021). Kinematics of Crab Giant Pulses. arXiv: 2105.08851
  • F Kirsten, B Marcote, K Nimmo, JWT Hessels, M Bhardwaj, SP Tendulkar, A Keimpema, J Yang, MP Snelders, P Scholz, AB Pearlman, CJ Law, WM Peters, M Giroletti, DM Hewitt, U Bach, V Bezukovs, M Burgay, ST Buttaccio, JE Conway, A Corongiu, R Feiler, O Forssén, MP Gawroński, R Karuppusamy, MA Kharinov, M Lindqvist, G Maccaferri, A Melnikov, OS Ould-Boukattine, Z Paragi, A Possenti, G Surcis, N Wang, J Yuan, K Aggarwal, R Anna-Thomas, GC Bower, R Blaauw, S Burke-Spolaor, T Cassanelli, TE Clarke, E Fonseca, BM Gaensler, A Gopinath, VM Kaspi, N Kassim, TJW Lazio, C Leung, D Li, HH Lin, KW Masui, R Mckinven, D Michilli, A Mikhailov, C Ng, A Orbidans, UL Pen, E Petroff, M Rahman, SM Ransom, K Shin, KM Smith, IH Stairs, W Vlemmings.(2021). A repeating fast radio burst source in a globular cluster. arXiv: 2105.11445
  • Laura Wolz, Alkistis Pourtsidou, Kiyoshi W Masui, Tzu-Ching Chang, Julian E Bautista, Eva-Maria Müller, Santiago Avila, David Bacon, Will J Percival, Steven Cunnington, Chris Anderson, Xuelei Chen, Jean-Paul Kneib, Yi-Chao Li, Yu-Wei Liao, Ue-Li Pen, Jeffrey B Peterson, Graziano Rossi, Donald P Schneider, Jaswant Yadav, Gong-Bo Zhao.(2021). HI constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps. arXiv: 2102.04946
  • Daniel Baker, Walter Brisken, Marten H van Kerkwijk, Robert Main, Ue-Li Pen, Tim Sprenger, Olaf Wucknitz.(2021). Interstellar Interferometry: Precise Curvature Measurement from Pulsar Secondary Spectra. arXiv: 2101.04646.
  • Giuseppe Cataldo, Peter AR Ade, Christopher J Anderson, Alyssa Barlis, Emily M Barrentine, Nicholas G Bellis,et al. (2020) Overview and status of EXCLAIM, the experiment for cryogenic large-aperture intensity mapping. International Society for Optics and Photonics. Volume 11453, Page 114530H
  • Hong-Ming Zhu, Ue-Li Pen.(2020). Cosmic microwave background lensing with optimal convergence and shear estimators. arXiv: 2011.08251
  • Jow, Dylan L.; Foreman, Simon; Pen, Ue-Li; Zhu, Wei. (2020). Wave effects in the microlensing of pulsars and FRBs by point masses. arXiv. http://arxiv.org/abs/2002.01570
  • Inman, Derek; Pen, Ue-Li; Villaescusa-Navarro, Francisco. (2018). Dipole Distortions in the Intergalactic Medium. arXiv: 1812:02148.
  • Hao-Ran Yu, Ue-Li Pen, Xin Wang. (2018). Parity-odd Neutrino Torque Detection. ariv:18010.11784.
  • Kodwani, Darsh; Meerburg, P. Daniel; Pen, Ue-Li; Wang, Xin. (2019). Initial conditions of the universe: A sign of the sine mode. arXiv: 1903.05042
  • Yu, Hao-Ran; Yu, Yu; Motloch, Pavel; Pen, Ue-Li; Wang, Huiyuan; Mo, Houjun. (2019). Probing primordial chirality with galaxy spins. arXiv: 1904.01029.
  • Pen, Ue-Li. (2020). Nonlinear Reconstruction: the Cosmic Web Inside Out. the Lorentz Center workshop. Leiden University, Netherlands. Lorentz Center.
  • Luo, J.; Pen, U.; Van Kerkwijk, M.; Demorest, P.; Main, R. (2020). Is the Black Widow Pulsar Eclipsed by its Companion?. Bulletin of the American Astronomical Society. 235th American Astronomical Society meeting, Honolulu, United States. American Astronomical Society.
  • Pen. Ue-Li. (2019). The CHIME Telescope. Arecibo IPS Workshop. Puerto Rico.
  • Pen. Ue-Li. (2019). Cosmology and fundamental physics with FRBs. Cosmological Frontiers in Fundamental Physics 2019. Waterloo, Canada. Perimeter Institute.
  • Pen. Ue-Li. (2019). Synergy of Plasma Lensing and Gravitational Lensing. Gravity meets Plasma workshop. South-Western Institute for Astronomy Research, China.
  • Pen. Ue-Li. (2019). Interstellar Scintillation Theory and Experimentation: the Potential of 1-D Scintillation Screens in the Interstellar Medium. Scintillating Science: Cutting-Edge Science Achieved Through the Observations of Radio Scintillation Conference. South Africa National Space Agency , South Africa.
  • Pen. Ue-Li. (2019). 21cm intensity mapping: current results and future potential. Future of Canadian Radio Astronomy Workshop. the Dominion Radio Astrophysical Observatory, British Columbia, Canada.
  • "FRBs: Coherent probes of space-time". FRB 2021(Virtual), International Conference. August.,4. 20 minutes. Plenary.
  • "FRBs: Coherent probes of space-time".CITA, Toronto, Canada. July.,22. 60 minutes.
  • "Wave Optics Lensing: cosmology and fundamental physics from gravitational and plasma lensing of FRBs and other coherent sources". Heidelberg Institute for Theoretical Physics (virtual), Heidelberg, Germany. May.,18. 60 minutes
  • "Is the Black Widow Pulsar Eclipsed by its Companion?". Bulletin of the American Astronomical Society, Honolulu, United States, January.
  • "Cosmic fossils: Galaxy Directional Spin". Edinburgh"s Royal Observatory (virtual), Edinburgh, United Kingdom. October., 28. 60 minutes.
  • "The Stockert Teleskop." , Germany, June.
  • "the Stockert Radioteleskop upgrade". Dunlap Institute for Astronomy and Astrophysics, University of Toronto. Toronto, Canada. Apr., 20. 20 mins.
  • "Galaxy spin: a cosmic fossil". Albert-Einstein-Institute and the Leibniz-Institute for Astrophysics. Potsdam, Germany. Feb., 20. 45 mins.
  • "Gravitational Waves: Resolution, Sources, Confusion". Max Planck Institute for Radio Astronomy. Bonn, Germany. Feb., 19. 60 mins
  • "Fast Radio Bursts: CHIME and beyond". Academia Sinica. Taipei, Taiwan. Jan., 16. 45 mins.
  • "CHIME and beyond". Laboratoire d'Annecy-le-Vieux de Physique Théorique. Annecy, France. Nov., 14. 60 mins.
  • "Fast Radio Bursts: present and future". Oxford University. The United Kingdom. Nov., 25. 45 mins.
  • "Gravitational Waves".Max Planck Institute for Theoretical Astrophysics. Bonn, Germany. Oct., 16. 30 mins.
  • "Probing cosmic initial conditions with galaxy spin vector."Academia Sinica Institute of Astronomy and Astrophysics, National Taiwan University, Taiwan. Jun., 3. 60 mins.
  • "the Stockert Radioteleskop upgrade". Dunlap Institute for Astronomy and Astrophysics, University of Toronto. Toronto, Canada. Apr., 20. 20 mins.