Spitzer Microlensing of MOA-2016-BLG-231L: A Counter-rotating Brown Dwarf 
Binary in the Galactic Disk

Chung, Sun-Ju; Gould, Andrew; Skowron, Jan; Bond, Ian A.; Zhu, Wei; Albrow, Michael D.; Jung, Youn Kil; Han, Cheongho; Hwang, Kyu-Ha; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Yee, Jennifer C.; Zang, Weicheng; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Hyoun-Woo; Kim, Seung-Lee; Kim, Yun-Hak; Lee, Chung-Uk; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard W.; Collaboration, KMTNet; Udalski, Andrzej; Poleski, Radek; Mróz, Przemek; Pietrukowicz, Paweł; Szymański, Michał K.; Soszyński, Igor; Kozłowski, Szymon; Ulaczyk, Krzysztof; Pawlak, Michał; Collaboration, The OGLE; Beichman, Charles A.; Bryden, Geoffery; Calchi Novati, Sebastiano; Carey, Sean; Gaudi, B. Scott; Henderson, Calen B.; Team, The Spitzer; Abe, Fumio; Barry, Richard; Bennett, David P.; Bhattacharya, Aparna; Donachie, Martin; Fukui, Akihiko; Hirao, Yuki; Itow, Yoshitaka; Kawasaki, Kohei; Kondo, Iona; Koshimoto, Naoki; Li, Man Cheung Alex; Matsubara, Yutaka; Muraki, Yasushi; Miyazaki, Shota; Nagakane, Masayuki; Ranc, Clément; Rattenbury, Nicholas J.; Suematsu, Haruno; Sullivan, Denis J.; Sumi, Takahiro; Suzuki, Daisuke; Tristram, Paul J.; Yonehara, Atsunori; MOA colllaboration, The

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学術論文

Spitzer Microlensing of MOA-2016-BLG-231L: A Counter-rotating Brown Dwarf Binary in the Galactic Disk

MPS-Authors

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

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

Skowron, Jan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bond, Ian A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zhu, Wei
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;

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

Han, Cheongho
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;

Ryu, Yoon-Hyun
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;

Kim, Yun-Hak
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;

Collaboration, KMTNet
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Udalski, Andrzej
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Poleski, Radek
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mróz, Przemek
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pietrukowicz, Paweł
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Szymański, Michał K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Soszyński, Igor
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kozłowski, Szymon
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ulaczyk, Krzysztof
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pawlak, Michał
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Collaboration, The OGLE
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Beichman, Charles A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bryden, Geoffery
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Calchi Novati, Sebastiano
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Carey, Sean
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gaudi, B. Scott
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henderson, Calen B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Team, The Spitzer
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Abe, Fumio
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Barry, Richard
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bennett, David P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bhattacharya, Aparna
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Donachie, Martin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fukui, Akihiko
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hirao, Yuki
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Itow, Yoshitaka
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kawasaki, Kohei
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kondo, Iona
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Koshimoto, Naoki
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Li, Man Cheung Alex
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Matsubara, Yutaka
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Muraki, Yasushi
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Miyazaki, Shota
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Nagakane, Masayuki
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ranc, Clément
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rattenbury, Nicholas J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Suematsu, Haruno
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sullivan, Denis J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sumi, Takahiro
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Suzuki, Daisuke
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tristram, Paul J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yonehara, Atsunori
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

MOA colllaboration, The
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019ApJ...871..179C
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引用

Chung, S.-J., Gould, A., Skowron, J., Bond, I. A., Zhu, W., Albrow, M. D., Jung, Y. K., Han, C., Hwang, K.-H., Ryu, Y.-H., Shin, I.-G., Shvartzvald, Y., Yee, J. C., Zang, W., Cha, S.-M., Kim, D.-J., Kim, H.-W., Kim, S.-L., Kim, Y.-H., Lee, C.-U., Lee, D.-J., Lee, Y., Park, B.-G., Pogge, R. W., Collaboration, K., Udalski, A., Poleski, R., Mróz, P., Pietrukowicz, P., Szymański, M. K., Soszyński, I., Kozłowski, S., Ulaczyk, K., Pawlak, M., Collaboration, T. O., Beichman, C. A., Bryden, G., Calchi Novati, S., Carey, S., Gaudi, B. S., Henderson, C. B., Team, T. S., Abe, F., Barry, R., Bennett, D. P., Bhattacharya, A., Donachie, M., Fukui, A., Hirao, Y., Itow, Y., Kawasaki, K., Kondo, I., Koshimoto, N., Li, M. C. A., Matsubara, Y., Muraki, Y., Miyazaki, S., Nagakane, M., Ranc, C., Rattenbury, N. J., Suematsu, H., Sullivan, D. J., Sumi, T., Suzuki, D., Tristram, P. J., Yonehara, A., & MOA colllaboration, T. (2019). Spitzer Microlensing of MOA-2016-BLG-231L: A Counter-rotating Brown Dwarf Binary in the Galactic Disk. The Astrophysical Journal, 871.

引用: https://hdl.handle.net/21.11116/0000-0005-D3DB-6

要旨

We analyze the binary microlensing event MOA-2016-BLG-231, which was observed from the ground and from Spitzer. The lens is composed of very- low-mass brown dwarfs (BDs) with {M}₁={21}_-5⁺¹² {M}_J and {M}₂={9}_-2⁺⁵ {M}_J, and it is located in the Galactic disk {D}_{{L}}={2.85}_-0.50^+0.88 {kpc}. This is the fifth binary brown dwarf discovered by microlensing, and the BD binary is moving counter to the orbital motion of disk stars. Constraints on the lens physical properties come from late-time, non- caustic-crossing features of the Spitzer light curve. Thus, MOA-2016-BLG-231 shows how Spitzer plays a crucial role in resolving the nature of BDs in binary BD events with short timescales (‚â≤10 days).