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学術論文

KMT-2018-BLG-1990Lb: A Nearby Jovian Planet From A Low-cadence Microlensing Field

MPS-Authors

Ryu,  Yoon-Hyun
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hwang,  Kyu-Ha
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gould,  Andrew
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Albrow,  Michael D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Chung,  Sun-Ju
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Han,  Cheongho
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jung,  Youn Kil
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Shin,  In-Gu
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Shvartzvald,  Yossi
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yee,  Jennifer C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zang,  Weicheng
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cha,  Sang-Mok
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kim,  Dong-Jin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kim,  Hyoun-Woo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kim,  Seung-Lee
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lee,  Chung-Uk
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lee,  Dong-Joo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lee,  Yongseok
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Park,  Byeong-Gon
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pogge,  Richard W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019AJ....158..151R
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引用

Ryu, Y.-H., Hwang, K.-H., Gould, A., Albrow, M. D., Chung, S.-J., Han, C., Jung, Y. K., Shin, I.-G., Shvartzvald, Y., Yee, J. C., Zang, W., Cha, S.-M., Kim, D.-J., Kim, H.-W., Kim, S.-L., Lee, C.-U., Lee, D.-J., Lee, Y., Park, B.-G., & Pogge, R. W. (2019). KMT-2018-BLG-1990Lb: A Nearby Jovian Planet From A Low-cadence Microlensing Field. The Astronomical Journal, 158.


引用: https://hdl.handle.net/21.11116/0000-0005-D270-F
要旨
We report the discovery of KMT-2018-BLG-1990Lb, a Jovian planet ({m}p={0.57}-0.25+0.79 {M}J) orbiting a late M dwarf (M={0.14}-0.06+0.20 {M}ȯ ) at a distance of ({D}L={1.23}-0.43+1.06 {kpc}), and projected at 2.6 ± 0.6 times the snow line distance, i.e., {a}snow}\equiv 2.7 {au}(M/{M}ȯ ). This is the second Jovian planet discovered by the Korea Microlensing Telescope Network (KMTNet) in its low-cadence (0.4 hr−1) fields, demonstrating that this population can be probed based on relatively low-cadence survey-only microlensing data. However, while many Jovian- planet microlensing events will not have caustic crossings (e.g., the previous case, KMT-2016-BLG-1397) and some that do will be well characterized by low-cadence survey observations (e.g., the current case), in general higher-cadence follow-up observations of the caustic crossings are preferable. Such follow-up observations require microlensing alerts, which KMTNet now provides.