Jongho Park

Jongho Park

Observational Astronomer specializing in observations of supermassive black holes and relativistic jets. Member of the Event Horizon Telescope Collaboration. An assistant professor at KHU.

jparkastro@khu.ac.kr

Room 534, College of Applied Science, Kyung Hee University, 1732 Deogyeong-daero Giheung-gu, Yongin-si, Gyeonggi-Do 17104, Republic of Korea

Publications

You can find my papers on ADS.

First Author Papers

16. Discovery of Limb-Brightening in the Parsec-Scale Jet of NGC 315 through Global VLBI Observations and Its Implications for Jet Models
Park, J.; Zhao, Guang-Yao; Nakamura, Masanori; et al. 2024, ApJL, 973, L45
ADShttps://ui.adsabs.harvard.edu/abs/2024ApJ…973L..45P/abstract | arXiv

15. Observational Evidence for a Dense Ambient Medium Shaping the Jet in 3C 84
Park, J.; Kino, M.; Nagai, H.; et al. 2024, A&A, 685, 115
ADS | arXiv

14. Calibrating VLBI Polarization Data Using GPCAL. II. Time-dependent Calibration
Park, J.; Asada, K.; Byun, D.-Y. 2023, ApJ, 958, 28
ADS | arXiv

13. Calibrating VLBI Polarization Data Using GPCAL. I. Frequency-dependent Calibration
Park, J.; Asada, K.; Byun, D.-Y. 2023, ApJ, 958, 27
ADS | arXiv

12. Polarization Observations of AGN Jets: Past and Future
Park, J.; Algaba, J. C. 2022, Galaxies, 10(5), 102
ADS | arXiv

11. A revised view of the linear polarization in the subparsec core of M87 at 7 mm
Park, J.; Asada, K.; Nakamura, M.; et al. 2021, ApJ, 922, 180
ADS | arXiv

10. Jet collimation and acceleration in the giant radio galaxy NGC 315
Park, J.; Hada, K.; Nakamura, M.; et al. 2021, ApJ, 909, 76
ADS | arXiv

9. GPCAL: a generalized calibration pipeline for instrumental polarization in VLBI data
Park, J.; Byun, D.-Y.; Asada, K.; Yun, Y. 2021, ApJ, 906, 85
ADS | arXiv

8. Kinematics of the M87 Jet in the Collimation Zone: Gradual Acceleration and Velocity Stratification
Park, J.; Hada, K.; Kino, M.; et al. 2019, ApJ, 887, 147
ADS | arXiv

7. Ejection of Double knots from the radio core of PKS 1510-089 during the strong gamma-ray flares in 2015
Park, J.; Lee, S.-S.; Kim, J.-Y.; et al. 2019, ApJ, 877, 106
ADS | arXiv

6. Faraday Rotation in the Jet of M87 Inside the Bondi Radius: Indication of Winds from Hot Accretion Flows Confining the Relativistic Jet
Park, J.; Hada, K.; Kino, M.; et al. 2019, ApJ, 871, 257
ADS | arXiv

5. Revealing the Nature of Blazar Radio Cores through Multifrequency Polarization Observations with the Korean VLBI Network
Park, J.; Kam, M.; Trippe, S.; et al. 2018, ApJ, 860, 112
ADS | arXiv

4. The Long-Term Centimeter Variability of Active Galactic Nuclei: a New Relation between Variability Timescale and Accretion Rate
Park, J.; Trippe, S. 2017, ApJ, 834, 157
ADS | arXiv

3. No asymmetric outflows from Sagittarius A* during the pericenter passage of the gas cloud G2
Park, J.; Trippe, S.; Krichbaum, T. P.; et al. 2015, A&A, 576, L16
ADS | arXiv

2. Radio Variability and Random Walk Noise Properties of Four Blazars
Park, J.; Trippe, S. 2014, ApJ, 785, 76
ADS | arXiv

1. Multiple Emission States in Active Galactic Nuclei
Park, J.; Trippe, S. 2012, JKAS, 45, 147
ADS | arXiv

Papers written by Students I mentored (Corresponding Author Papers)

1. Jet Collimation and Acceleration in the Flat Spectrum Radio Quasar 1928+738
Yi, Kunwoo; Park, Jongho; Nakamura, Masanori; et al. 2024, A&A, in press
ADS | arXiv

Co-Author Papers

68. Mapping the Distribution of the Magnetic Field Strength along the NGC 315 Jet
Kino, Motoki; Ro, Hyunwook; Takahashi, Masaaki; …; Park, Jongho; et al. 2024, ApJ, 973, 100
ADS | arXiv

67. First Very Long Baseline Interferometry Detections at 870 μm
Raymond, Alexander W.; Doeleman, Sheperd S.; Asada, Keiichi; Event Horizon Telescope Collaboration; et al. 2024, AJ, 168, 130
ADS

66. Evolution of the Termination Region of the Parsec-Scale Jet of 3C 84 Over the Past 20 Years
Kam, Minchul; Hodgson, Jeffrey A.; Park, Jongho; et al. 2024, ApJ, 970, 176
ADS | arXiv

65. First Sagittarius A* Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized Ring
Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; et al. 2024, ApJ Letters, 964, 26
ADS

64. First Sagittarius A* Event Horizon Telescope Results. VII. Polarization of the Ring
Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; et al. 2024, ApJ Letters, 964, 25
ADS

63. Ordered magnetic fields around the 3C 84 central black hole
Paraschos, G. F.; Kim, J. -Y.; Wielgus, M.; Event Horizon Telescope Collaboration; et al. 2024, A&A, 682, 3
ADS | arXiv

62. The persistent shadow of the supermassive black hole of M 87. I. Observations, calibration, imaging, and analysis
Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; et al. 2024, A&A, 681, 79
ADS

61. A search for pulsars around Sgr A* in the first Event Horizon Telescope dataset
Torne, Pablo; Liu, Kuo; Eatough, Ralph P.; Event Horizon Telescope Collaboration; et al. 2023, ApJ, in press
ADS | arXiv

60. Polarimetric Geometric Modeling for mm-VLBI Observations of Black Holes
Roelofs, Freek; Johnson, Michael D.; Chael, Andrew; Event Horizon Telescope Collaboration; et al. 2023, ApJL, 957, 21
ADS | arXiv

59. First M87 Event Horizon Telescope Results. IX. Detection of Near-horizon Circular Polarization
Event Horizon Telescope Collaboration; et al. 2023, ApJL, 957, 20
ADS

58. The Greenland Telescope-Construction, Commissioning, and Operations in Pituffik
Chen, Ming-Tang; Asada, Keiichi; Matsushita, Satoki; …; Park, J.; et al. 2023, PASP, 135, 5001
ADS | arXiv

57. Precessing jet nozzle connecting to a spinning black hole in M87
Cui, Yuzhu; Hada, Kazuhiro; Kawashima, Tomohisa; …; Park, J.; et al. 2023, Nature, 621, 711
ADS | arXiv

56. Double SSA spectrum and magnetic field strength of the FSRQ 3C 454.3
Jeong, Hyeon-Woo; Lee, Sang-Sung; Cheong, Whee Yeon; …; Park, J.; et al. 2023, MNRAS, 523, 5703
ADS | arXiv

55. Probing the Heart of Active Narrow-line Seyfert 1 Galaxies with VERA Wideband Polarimetry
Takamura, Mieko; Hada, Kazuhiro; Honma, Mareki; …; Park, J.; et al. 2023, ApJ, 952, 47
ADS | arXiv

54. Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration
Prather, Ben S.; Dexter, Jason; Moscibrodzka, Monika; Event Horizon Telescope Collaboration; et al. 2023, ApJ, 950, 35
ADS | arXiv

53. Surveying Flux Density in Galaxies with Apparent Large Black Holes at Millimeter/Submillimeter Wavelengths
Lo, Wen-Ping; Asada, Keiichi; Matsushita, Satoki; Park, J.; et al. 2023, ApJ, 950, 10
ADS

52. Spectral analysis of a parsec-scale jet in M 87: Observational constraint on the magnetic field strengths in the jet
Ro, Hyunwook; Kino, Motoki; Sohn, Bong Won; …; Park, J.; et al. 2023, A&A, 673, 159
ADS | arXiv

51. A ring-like accretion structure in M87 connecting its black hole and jet
Lu, Ru-Sen; Asada, Keiichi; Krichbaum, Thomas P.; Park, J.; et al. 2023, Nature, 616, 686
ADS | arXiv

50. The Event Horizon Telescope Image of the Quasar NRAO 530
Jorstad, Svetlana; Wielgus, Maciek; Lico, Rocco; Event Horizon Telescope Collaboration; et al. 2023, ApJ, 943, 170
ADS | arXiv

49. Using the Crab Nebula as Polarization Angle Calibrator for the Korean VLBI Network
Kam, Minchul; Trippe, Sascha; Byun, Do-Young; Park, J.; et al. 2023, JKAS, 56, 1
ADS | arXiv

48. Overview of the Observing System and Initial Scientific Accomplishments of the East Asian VLBI Network (EAVN)
Akiyama, Kazunori; Algaba, Juan-Carlos; An, Tao; …; Park, J.; et al. 2022, Galaxies, 10, 113
ADS | arXiv

47. Implications from the Velocity Profile of the M87 Jet: A Possibility of a Slowly Rotating Black Hole Magnetosphere
Kino, Motoki; Takahashi, Masaaki; Kawashima, Tomohisa; Park, J.; et al. 2022, ApJ, 939, 83
ADS | arXiv

46. The Photon Ring in M87*
Broderick, Avery E.; Pesce, Dominic W.; Gold, Roman; …; Event Horizon Telescope Collaboration; et al. 2022, ApJ, 935, 61
ADS | arXiv

45. Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope
Issaoun, Sara; Wielgus, Maciek; Jorstad, Svetlana; …; Event Horizon Telescope Collaboration; et al. 2022, ApJ, 934, 145
ADS | arXiv

44. Unraveling the Innermost Jet Structure of OJ 287 with the First GMVA + ALMA Observations
Zhao, Guang-Yao; Gómez, José L.; Fuentes, Antonio; …; Park, J.; et al. 2022, ApJ, 932, 72
ADS | arXiv

43. Characterizing and Mitigating Intraday Variability: Reconstructing Source Structure in Accreting Black Holes with mm-VLBI
Broderick, Avery E.; Gold, Roman; Georgiev, Boris; …; Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 21
ADS

42. A Universal Power-law Prescription for Variability from Synthetic Images of Black Hole Accretion Flows
Georgiev, Boris; Pesce, Dominic W.; Broderick, Avery E.; …; Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 20
ADS

41. Millimeter Light Curves of Sagittarius A* Observed during the 2017 Event Horizon Telescope Campaign
Wielgus, Maciek; Marchili, Nicola; Martí-Vidal, Iván; …; Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 19
ADS | arXiv

40. Selective Dynamical Imaging of Interferometric Data
Farah, Joseph; Galison, Peter; Akiyama, Kazunori; …; Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 18
ADS

39. First Sagittarius A* Event Horizon Telescope Results. VI. Testing the Black Hole Metric
Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 17
ADS

38. First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 16
ADS

37. First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass
Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 15
ADS

36. First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole
Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 14
ADS

35. First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multiwavelength Observations, Data Processing, and Calibration
Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 13
ADS

34. First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
Event Horizon Telescope Collaboration; et al. 2022, ApJ, 930, 12
ADS

33. The Intrinsic Structure of Sagittarius A* at 1.3 cm and 7 mm
Cho, Ilje; Zhao, Guang-Yao; Kawashima, Tomohisai; …; Park, J.; et al. 2022, ApJ, 926, 108
ADS | arXiv

32. East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA+Tianma+Nanshan
Cui, Yu-Zhu; Hada, Kazuhiro; Kino, Motoki; …; Park, J.; et al. 2021, RAA, 21, 205
ADS | arXiv

31. Event Horizon Telescope observations of the jet launching and collimation in Centaurus A
Janssen, Michael; Falcke, Heino; Kadler, Matthias; …; Event Horizon Telescope Collaboration; et al. 2021, Nature Astronomy, 5, 1017
ADS | arXiv

30. A Detailed Kinematic Study of 3C 84 and Its Connection to Gamma-Rays
Hodgson, Jeffrey A.; Rani, Bindu; Oh, Junghwan; …; Park, J.; et al. 2021, ApJ, 914, 43
ADS | arXiv

29. Interferometric Monitoring of Gamma-ray Bright AGNs: Measuring the Magnetic Field Strength of 4C +29.45
Kang, S.; Lee, S. -S.; Hodgson, J.; …; Park, J.; et al. 2021, A&A, 651, A74
ADS | arXiv

28. Constraints on Black-hole Charges with the 2017 EHT Observations of M87*
Kocherlakota, Prashant; Rezzolla, Luciano; Falcke, Heino; …; Event Horizon Telescope Collaboration; et al. 2021, PhRvD, 103, 4047
ADS | arXiv

27. The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole
Narayan, Ramesh; Palumbo, Daniel C. M.; Johnson, Michael D.; …; Event Horizon Telescope Collaboration; et al. 2021, ApJ, 912, 35
ADS | arXiv

26. East Asian VLBI Network Observations of Active Galactic Nuclei Jets: Imaging with KaVA+Tianma+Nanshan
Cui, Yuzhu; Hada, Kazuhiro; Kino, Motoki; …; Park, J.; et al. 2021, RAA, 21, 205
ADS | arXiv

25. Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
EHT MWL Science Working Group; et al. 2021, ApJ, 911, 11
ADS | arXiv

24. Polarimetric Properties of Event Horizon Telescope Targets from ALMA
Goddi, Ciriaco; Marti-Vidal, Ivan; Messias, H.; …; Event Horizon Telescope Collaboration; et al. 2021, ApJ, 910, 14
ADS | arXiv

23. First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near the Event Horizon
Event Horizon Telescope Collaboration; et al. 2021, ApJ, 910, 13
ADS | arXiv

22. First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
Event Horizon Telescope Collaboration; et al. 2021, ApJ, 910, 12
ADS | arXiv

21. Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
Psaltis, Dimitrios; Medeiros, Lia; Christian, Pierre; …; Event Horizon Telescope Collaboration; et al. 2020, PhRvL, 125, 1104
ADS | arXiv

20. Interferometric Monitoring of Gamma-Ray Bright AGNs: OJ 287
Lee, Jee Won; Lee, Sang-Sung; Algaba, Juan-Carlos; …; Park, J.; et al. 2020, ApJ, 902, 104
ADS | arXiv

19. Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope
Wielgus, Maciek; Akiyama, Kazunori; Blackburn, Lindy; …; Event Horizon Telescope Collaboration; et al. 2020, ApJ, 901, 67
ADS | arXiv

18. Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution
Kim, Jae-Young; Krichbaum, Thomas P.; Broderick, Avery E.; …; Event Horizon Telescope Collaboration; et al. 2020, A&A, 640, 69
ADS

17. Verification of Radiative Transfer Schemes for the EHT
Gold, Roman; Broderick, Avery E.; Younsi, Ziri; …; Event Horizon Telescope Collaboration; et al. 2020, ApJ, 897, 148
ADS

16. THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope
Broderick, Avery E.; Gold, Roman; Karami, Mansour; …; Event Horizon Telescope Collaboration; et al. 2020, ApJ, 897, 139
ADS

15. Linear Polarization in the Nucleus of M87 at 7 mm and 1.3 cm
Kravchenko, E.; Giroletti, M.; Hada, K.; Meier, D. L.; Nakamura, M.; Park, J.; Walker, R. C. 2020, A&A, 637, 6
ADS | arXiv

14. Exploring the Morphology and Origins of the 4C 38.41 Jet
Algaba, J. C.; Rani, B.; Lee, S.-S.; Kino, M.; Park, J.; Kim, J.-Y. 2019, ApJ, 886, 85
ADS | arXiv

13. Jet Kinematics of the Quasar 4C+21.35 from Observations with the KaVA Very Long Baseline Interferometry Array
Lee, T.; Trippe, S.; Kino, M.; …; Park, J.; et al. 2019, MNRAS, 486, 2412
ADS | arXiv

12. Source-Frequency Phase-Referencing Observation of AGNs with KaVA using Simultaneous Dual-Frequency Receiving
Zhao, G.-Y.; Jung, T.; Sohn, B. W.; …; Park, J.; et al. 2019, JKAS, 52, 23
ADS | arXiv

11. Exploring the Nature of the 2016 gamma-­ray Emission in the Blazar 1749+096
Kim, D.; Trippe, S.; Lee, S.-S.; …; Park, J.; et al. 2018, MNRAS, 480, 2324
ADS | arXiv

10. Exploring the Variability of the Flat-spectrum Radio Source 1633+382. II. Physical Properties
Algaba, J.-C.; Lee, S.-S.; Rani, B.; …; Park, J.; et al. 2018, ApJ, 859, 128
ADS | arXiv

9. KVN Observations Reveal Multiple gamma-ray Emission Regions in 3C 84?
Hodgson, J. A.; Rani, B.; Lee, S.-S.; …; Park, J.; et al. 2018, MNRAS, 475, 368
ADS | arXiv

8. Exploring the Variability of the Flat-spectrum Radio Source 1633+382. I. Phenomenology of the Light Curves
Algaba, J.-C.; Lee, S.-S.; Kim, D.; …; Park, J.; et al. 2018, ApJ, 852, 30
ADS | arXiv

7. The Power of Simultaneous Multi-frequency Observations for mm-VLBI: Beyond Frequency Phase Transfer
Zhao, G.-Y.; Algaba, J.-C.; Lee, S.-S.; …; Park, J.; et al. 2018, AJ, 155, 26
ADS | arXiv

6. The Millimeter-Radio Emission of BL Lacertae during Two gamma-ray Outbursts
Kim, D.; Trippe, S.; Lee, S.-S.; Park, J.; et al. 2017, JKAS, 50, 167
ADS | arXiv

5. Pilot KaVA monitoring on the M 87 jet: Confirming the inner jet structure and superluminal motions at sub-pc scales
Hada, K.; Park, J.; Kino, M.; et al. 2017, PASJ, 69, 71
ADS | arXiv

4. Interferometric Monitoring of gamma-ray Bright AGNs. I. The Results of Single-epoch Multifrequency Observations
Lee, S.-S.; Wajima, K.; Algaba, J.-C.; …; Park, J.; et al. 2016, ApJS, 227, 8
ADS | arXiv

3. PAGaN II: The Evolution of AGN Jets on Sub-Parsec Scales
Oh, J.; Trippe, S.; Kang, S.; …; Park, J.; et al. 2015, JKAS, 48, 299
ADS | arXiv

2. PAGaN I: Multi-Frequency Polarimetry of AGN Jets with KVN
Kim, J.; Trippe, S.; Sohn, B. W.; …; Park, J.; et al. 2015, JKAS, 48, 285
ADS | arXiv

1. Interferometric Monitoring of gamma-ray Bright Active Galactic Nuclei II: Frequency Phase Transfer
Algaba, J.-C.; Zhao, G.-Y.; Lee, S.-S.; …; Park, J.; et al. 2015, JKAS, 48, 237
ADS | arXiv