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The Korean Astronomical Society (한국천문학회)
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OGLE-2019-BLG-0362Lb: A SUPER-JOVIAN-MASS PLANET AROUND A LOW-MASS STAR

  • Chung, Sun-Ju (Korea Astronomy and Space Science Institute) ;
  • Yee, Jennifer C. (Center for Astrophysics | Harvard & Smithsonian) ;
  • Udalski, Andrej (Astronomical Observatory, University of Warsaw) ;
  • Gould, Andrew (Department of Astronomy, Ohio State University) ;
  • Albrow, Michael D. (Department of Physics and Astronomy, University of Canterbury) ;
  • Jung, Youn Kil (Korea Astronomy and Space Science Institute) ;
  • Hwang, Kyu-Ha (Korea Astronomy and Space Science Institute) ;
  • Han, Cheongho (Department of Physics, Chungbuk National University) ;
  • Ryu, Yoon-Hyun (Korea Astronomy and Space Science Institute) ;
  • Shin, In-Gu (Center for Astrophysics | Harvard & Smithsonian) ;
  • Shvartzvald, Yossi (Department of Particle Physics and Astrophysics, Weizmann Institute of Science) ;
  • Zang, Weicheng (Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University) ;
  • Cha, Sang-Mok (Korea Astronomy and Space Science Institute) ;
  • Kim, Dong-Jin (Korea Astronomy and Space Science Institute) ;
  • Kim, Seung-Lee (Korea Astronomy and Space Science Institute) ;
  • Lee, Chung-Uk (Korea Astronomy and Space Science Institute) ;
  • Lee, Dong-Joo (Korea Astronomy and Space Science Institute) ;
  • Lee, Yongseok (Korea Astronomy and Space Science Institute) ;
  • Park, Byeong-Gon (Korea Astronomy and Space Science Institute) ;
  • Pogge, Richard W. (Department of Astronomy, Ohio State University) ;
  • Poleski, Radek (Astronomical Observatory, University of Warsaw) ;
  • Mroz, Przemek (Astronomical Observatory, University of Warsaw) ;
  • Pietrukowicz, Pawel (Astronomical Observatory, University of Warsaw) ;
  • Skowron, Jan (Astronomical Observatory, University of Warsaw) ;
  • Szymanski, Michal K. (Astronomical Observatory, University of Warsaw) ;
  • Soszynski, Igor (Astronomical Observatory, University of Warsaw) ;
  • Kozlowski, Szymon (Astronomical Observatory, University of Warsaw) ;
  • Rybicki, Krzysztof A. (Astronomical Observatory, University of Warsaw) ;
  • Iwanek, Patryk (Astronomical Observatory, University of Warsaw) ;
  • Wrona, Marcin (Astronomical Observatory, University of Warsaw) ;
  • Gromadzki, Mariusz (Astronomical Observatory, University of Warsaw) ;
  • Ulaczyk, Krzysztof (Department of Physics, University of Warwick)
  • Received : 2022.04.08
  • Accepted : 2022.07.24
  • Published : 2022.08.31
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Abstract

We present the analysis of a planetary microlensing event OGLE-2019-BLG-0362 with a shortduration anomaly (~0.4 days) near the peak of the light curve, which is caused by the resonant caustic. The event has a severe degeneracy with ∆𝜒2 = 0.9 between the close and the wide binary lens models both with planet-host mass ratio q ≃ 0.007. We measure the angular Einstein radius but not the microlens parallax, and thus we perform a Bayesian analysis to estimate the physical parameters of the lens. We find that the OGLE-2019-BLG-0362L system is a super-Jovian-mass planet $M_p=3.26^{+0.83}_{-0.58}M_J $ orbiting an M dwarf $M_h=0.42^{+0.34}_{-0.23}M_{\odot}$ at a distance $D_L=5.83^{+1.04}_{-1.55}kpc$. The projected star-planet separation is ${\alpha}_{\bot}= 2.18^{+0.58}_{-0.72}AU$, which indicates that the planet lies beyond the snow line of the host star.

Keywords

Acknowledgement

Work by S.-J. Chung was was supported by the Korea Astronomy and Space Science Institute under the R&D program (Project No. 2022-1-830-04) supervised by the Ministry of Science and ICT. J.C.Y. acknowledges support from N.S.F Grant No. AST-2108414. Work by C.H. was supported by the grants of National Research Foundation of Korea (2020R1A4A2002885 and 2019R1A2C2085965). This research has made use of the KMTNet system operated by the KASI and the data were obtained at three sites of CTIO in Chile, SAAO in South Africa, and SSO in Australia.

References

  1. Albrow, M. D. 2017, MichaelDAlbrow/pyDIA: Initial Release on Github (v1.0.0), Zenodo:268049
  2. Albrow, M. D., Horne, K., Bramich, D. M., et al. 2009, Difference Imaging Photometry of Blended Gravitational Microlensing Events with a Numerical Kernel, MNRAS, 397, 2099
  3. Alard, C., & Lupton, R. H. 1998, A Method for Optimal Image Subtraction, ApJ, 503, 325
  4. An, J. H., Albrow, M. D., Beaulieu, J.-P., et al. 2002, First Microlens Mass Measurement: Planet Photometry of EROS BLG-2000-5, ApJ, 572, 521
  5. Batista, V., Gould, A., Dieters, S., et al. 2011, MOA-2009-BLG-387Lb: A Massive Planet Orbiting an M Dwarf, A&A, 529, A102
  6. Bennett, D. P., Batista, V., Bond, I. A., et al. 2014, MOA-2011-BLG-262Lb: A Sub-Earth-Mass Moon Orbiting A Gas Giant Primary or A High Velocity Planetary System in the Galactic Bulge, ApJ, 785, 155
  7. Bensby, T., Aden, D., Melendez, J., et al. 2011, Chemical Evolution of the Galactic Bulge as Traced by Microlensed Dwarf and Subgiant Stars. IV. Two Bulge Populations, A&A, 533, A134
  8. Bessell, M. S., & Brett, J. M. 1988, JHKLM Photometry-Standard Systems, Passbands, and Intrinsic Colors, PASP, 100, 1134
  9. Bhattacharya, A., Bennett, D. P., Beaulieu, J. P., et al. 2021, MOA-2007-BLG-400 A Super-Jupiter-Mass Planet Orbiting a Galactic Bulge K-dwarf Revealed by Keck Adaptive Optics Imaging, AJ, 162, 60
  10. Boss, Alan P. 2006, Rapid Formation of Gas Giant Planets around M Dwarf Stars, ApJ, 643, 501
  11. Chung, S.-J., Gould, A., Skowron, J., et al. 2019, Spitzer Microlensing of MOA-2016-BLG-231L: A Counter-Rotating Brown Dwarf Binary in the Galactic Disk, ApJ, 871, 179
  12. Claret, A. 2000, A New Non-Linear Limb-Darkening Law for LTE Stellar Atmosphere Models. Calculations for -5.0 ≤ log [M/H] ≤ +1, 2000 K ≤ Teff ≤ 50000 K at Several Surface Gravities, A&A, 363, 1081
  13. Dominik, M. 1999, The binary gravitational lens and its extreme cases, A&A, 349, 108
  14. Gaudi, B. S. 1998, Distinguishing Between Binary-Source and Planetary Microlensing Perturbations, ApJ, 506, 533
  15. Gould, A. 1992, Extending the MACHO Search to Approximately 106 M⊙, ApJ, 392, 442
  16. Gould, A. 2000, A Natural Formalism for Microlensing, ApJ, 542, 785
  17. Gould, A., Miralda-Escude, J., & Bahcall, J. N. 1994, Microlensing Events: Thin Disk, Thick Disk, or Halo?, ApJ, 423, L105
  18. Gould, A., Ryu, Y.-H., Calchi Novati, S., et al. 2020, KMT-2018-BLG-0029Lb: A Very Low Mass-Ratio Spitzer Microlens Planet, JKAS, 53, 9
  19. Griest, K., & Hu, W. 1992, Effect of Binary Sources on the Search for Massive Astrophysical Compact Halo Objects via Microlensing, ApJ, 397, 362
  20. Griest, K., & Safizadeh, N. 1998, The Use of High-Magnification Microlensing Events in Discovering Extrasolar Planets, ApJ, 500, 37
  21. Han, C., Bond, I. A., Yee, J. C., et al. 2022, KMT-2021-BLG-0912Lb: A Microlensing Super Earth Around a K-type Star, A&A, 658, A94
  22. Han, C., Hirao, Y., Udalski, A., et al. 2018, OGLE-2017-BLG-0482Lb: A Microlensing Super-Earth Orbiting a Low-mass Host Star, AJ, 155, 211
  23. Han, C., & Gould, A. 1997, Einstein Radii from Binary-Source Lensing Events, ApJ, 480, 196
  24. Han, C., Gould, A., Albrow, M. D., et al. 2022, KMT-2018-BLG-1988Lb: Microlensing Super-Earth Orbiting a Low-Mass Disk Dwarf, A&A, 658, A62
  25. Han, C., Udalski, A., Lee, C.-U., et al. 2021, KMT-2018-BLG-1025Lb: Microlensing Super-Earth Planet Orbiting a Low-Mass Star, A&A, 649, A90
  26. Herrera-Martin, A., Albrow, M. D., Udalski, A., et al. 2020, OGLE-2018-BLG-0677Lb: A Super-Earth Near the Galactic Bulge, AJ, 159, 256
  27. Holtzman, J. A., Watson, A. M., Baum, W. A., et al. 1998, The Luminosity Function and Initial Mass Function in the Galactic Bulge, AJ, 115, 1946
  28. Hwang, K.-H., Choi, J.-Y., Bond, I. A., et al. 2013, Interpretation of a Short-term Anomaly in the Gravitational Microlensing Event MOA-2012-BLG-486, ApJ, 778, 55
  29. Hwang, K.-H., Kim, H.-W., Kim, D.-J., et al. 2018, KMT-2016-BLG-0212: First KMTNet-Only Discovery of A Substellar Companion, JKAS, 51, 197
  30. Hwang, K.-H., Udalski, A., Shvartzvald, Y., et al. 2018, OGLE-2017-BLG-0173Lb: Low-Mass-Ratio Planet in a "Hollywood" Microlensing Event, AJ, 155, 20
  31. Hwang, K.-H., Zang, W., Gould, A., et al. 2022, Systematic KMTNet Planetary Anomaly Search. II. Six New q < 2 × 10-4 Mass-Ratio Planets, AJ, 163, 43
  32. Jung, Y. K., Han, C., Udalski, A., et al. 2021, OGLE-2018-BLG-0567Lb and OGLE-2018-BLG-0962Lb: Two Microlensing Planets through the Planetary-Caustic Channel, AJ, 161, 293
  33. Jung, Y. K., Udalski, A., Gould, A., et al. 2018, OGLE-2017-BLG-1522: A Giant Planet around a Brown Dwarf Located in the Galactic Bulge, AJ, 155, 219
  34. Jung, Y. K., Udalski, A., Yee, J. C. et al. 2017, Binary Source Microlensing Event OGLE-2016-BLG-0733: Interpretation of a Long-term Asymmetric Perturbation, AJ, 153, 129
  35. Kennedy, G. M., & Kenyon, S. J. 2008, Planet Formation around Stars of Various Masses: The Snow Line and the Frequency of Giant Planets, AJ, 673, 502
  36. Kervella, P., Thevenin, F., Di Folco, E., & Segransan, D. 2004, The Angular Sizes of Dwarf Stars and Subgiants. Surface Brightness Relations Calibrated by Interferometry, A&A, 426, 297
  37. Kim, S.-L., Lee, C.-U., Park, B.-G., et al. 2016, KMTNET: A Network of 1.6 m Wide-Field Optical Telescopes Installed at Three Southern Observatories, JKAS, 49, 37
  38. Kim, Y. H., Chung, S.-J, Udalski, A., et al. 2020, OGLE-2017-BLG-1049: Another Giant Planet Microlensing Event, JKAS, 53, 161
  39. Kim, Y. H., Chung, S.-J, Udalski, A., et al. 2021, OGLE-2018-BLG-1428Lb: a Jupiter-Mass Planet beyond the Snow Line of a Dwarf Star, MNRAS, 503, 2706
  40. Kim, Y. H., Chung, S.-J, Yee, J. C., et al. 2021, KMT-2019-BLG-0371 and the Limits of Bayesian Analysis, AJ, 162, 17
  41. Kondo, I., Yee, J. C., Bennett, D. P., et al. 2021, OGLE-2018-BLG-1185b: A Low-Mass Microlensing Planet Orbiting a Low-Mass Dwarf, AJ, 162, 77
  42. Mroz, P., Udalski, A., Skowron, J., et al. 2017, No Large Population of Unbound or Wide-Orbit Jupiter-Mass Planets, Nature, 548, 183
  43. Nataf, D. M., Gould, A., Fouque, P., et al. 2013, Reddening and Extinction toward the Galactic Bulge from OGLE-III: The Inner Milky Way's RV ~ 2.5 Extinction Curve, ApJ, 769, 88
  44. Rhie, S. H., Becker, A. C., & Bennett, D. P. 1999, Observations of the Binary Microlens Event MACHO 98-SMC-1 by the Microlensing Planet Search Collaboration, ApJ, 522, 1037
  45. Ryu, Y.-H., Udalski, A., Yee, J. C., et al. 2020, OGLE-2018-BLG-0532Lb: Cold Neptune with Possible Jovian Sibling, AJ, 160, 183
  46. Shan, Y., Yee, J. C., Udalski, A., et al. 2019, OGLE-2014-BLG-0962 and a Comparison of Galactic Model Priors to Microlensing Data, ApJ, 873, 30
  47. Shin, I.-G., Ryu, Y.-H., Udalski, A., et al. 2016, A Super-Jupiter Microlens Planet Characterized by High-Cadence KMTNet Microlensing Survey Observations of OGLE-2015-BLG-0954, JKAS, 49, 73
  48. Shvartzvald, Y., Maoz, D., Udalski, A., et al. 2016, The Frequency of Snowline-Region Planets from Four Years of OGLE-MOA-Wise Second-Generation Microlensing, MNRAS, 457, 4089
  49. Shvartzvald, Y., Yee, J. C., Calchi Novati, S., et al. 2017, An Earth-Mass Planet in a 1 au Orbit around an Ultracool Dwarf, ApJ, 840, L3
  50. Skowron, J., Udalski, A., Gould, A., et al. 2011, Binary Microlensing Event OGLE-2009-BLG-020 Gives Verifiable Mass, Distance, and Orbit Predictions,ApJ, 738, 87
  51. Skowron, J., Udalski, A., Kozlowski, S., et al. 2016, Analysis of Photometric Uncertainties in the OGLE-IV Galactic Bulge Microlensing Survey Data, AcA, 66, 1
  52. Sumi, T., Udalski, A., Bennett, D. P., et al. 2016, The First Neptune Analog or Super-Earth with a Neptune-like Orbit: MOA-2013-BLG-605Lb, ApJ, 825, 112
  53. Suzuki, D., Bennett, D. P., Sumi, T., et al. 2016, The Exoplanet Mass-Ratio Function from the MOA-II Survey Discovery of a Break and Likely Peak at a Neptune Mass, ApJ, 833, 145
  54. Udalski, A., 2003, The Optical Gravitational Lensing Experiment. Real Time Data Analysis Systems in the OGLE-III Survey, AcA, 53, 291
  55. Udalski, A., Ryu, Y.-H., Sajadian, S., et al. 2018, OGLE-2017-BLG-1434Lb: Eighth q < 1 × 10-4 Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function, AcA, 68, 1
  56. Vandorou, A., Bennett, D. P., Beaulieu, J. P., et al. 2020, Revisiting MOA 2013-BLG-220L: A Solar-Type Star with a Cold Super-Jupiter Companion, AJ, 160, 121
  57. Wang, H., Zang, W., Zhu, W., et al. 2022, Systematic Korea Microlensing Telescope Network Planetary Anomaly Search - III. One Wide-Orbit Planet and Two Stellar Binaries, MNRAS, 510, 1778
  58. Wozniak, P. R. 2000, Difference Image Analysis of the OGLE-II Bulge Data. I. The Method, AcA, 50, 421
  59. Yee, J. C., Shvartzvald, Y., Gal-Yam, A., et al. 2012, MOA-2011-BLG-293Lb: A Testbed for Pure Survey Microlensing Planet Detections, ApJ, 755, 102
  60. Yee, J. C., Zang, W., Udalski, A., et al. 2021, OGLE-2019-BLG-0960 Lb: the Smallest Microlensing Planet, AJ, 162, 180
  61. Yoo, J., DePoy, D. L., Gal-Yam, A., et al. 2004, OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens, ApJ, 603, 139
  62. Zang, W., Han, C., Kondo, I., et al. 2021, An Earth-Mass Planet in a Time of COVID-19: KMT-2020-BLG-0414Lb, RAA, 21, 239
  63. Zang, W., Hwang, K.-H., Udalski, A., et al. 2021, Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet, AJ, 162, 163
  64. Zhu, W., & Dong, S. 2021, Exoplanet Statistics and Theoretical Implications, ARA&A, 59, 291