OGLE-2018-BLG-1269Lb: A Jovian Planet With A Bright, $I=16$ Host

Autor: Jung, Youn Kil, Gould, Andrew, Udalski, Andrzej, Sumi, Takahiro, Yee, Jennifer C., Han, Cheongho, Albrow, Michael D., Chung, Sun-Ju, Hwang, Kyu-Ha, Ryu, Yoon-Hyun, Shin, In-Gu, Shvartzvald, Yossi, Zhu, Wei, Zang, Weicheng, Cha, Sang-Mok, Kim, Dong-Jin, Kim, Hyoun-Woo, Kim, Seung-Lee, Lee, Chung-Uk, Lee, Dong-Joo, Lee, Yongseok, Park, Byeong-Gon, Pogge, Richard W., Mróz, Przemek, Szymański, Michał K., Skowron, Jan, Poleski, Radek, Soszyński, Igor, Pietrukowicz, Paweł, Kozłowski, Szymon, Ulaczyk, Krzystof, Rybicki, Krzysztof A., Iwanek, Patryk, Wrona, Marcin, Abe, Fumio, Barry, Richard, Bennett, David P., Bond, Ian A., Bhattacharya, Aparna, Donachie, Martin, Fukui, Akihiko, Hirao, Yuki, Itow, Yoshitaka, Kondo, Iona, Koshimoto, Naoki, Li, Man Cheung Alex, Matsubara, Yutaka, Miyazaki, Shota, Muraki, Yasushi, Nagakane, Masayuki, Ranc, Clément, Rattenbury, Nicholas~J., Suematsu, Haruno, Sullivan, Denis J., Suzuki, Daisuke, Tristram, Paul J., Yonehara, Atsunori

We report the discovery of a planet in the microlensing event OGLE-2018-BLG-1269, with planet-host mass ratio $q \sim 6\times10^{-4}$, i.e., $0.6$ times smaller than the Jupiter/Sun mass ratio. Combined with the $Gaia$ parallax and proper motion, a s

Externí odkaz: http://arxiv.org/abs/2006.15774

Candidate Brown-dwarf Microlensing Events with Very Short Timescales and Small Angular Einstein Radii

Autor: Han, Cheongho, Lee, Chung-Uk, Udalski, Andrzej, Gould, Andrew, Bond, Ian A., Bozza, Valerio, Albrow, Michael D., Chung, Sun-Ju, Hwang, Kyu-Ha, Jung, Youn Kil, 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, Lee, Dong-Joo, Lee, Yongseok, Park, Byeong-Gon, Pogge, Richard W., Jee, M. James, Kim, Doeon, Mróz, Przemek, Szymański, Michał K., Skowron, Jan, Poleski, Radek, Soszyński, Igor, Pietrukowicz, Paweł, Kozłowski, Szymon, Ulaczyk, Krzysztof, Rybicki, Krzysztof A., Iwanek, Patryk, Wrona, Marcin, Abe, Fumio, Barry, Richard, Bennett, David P., Bhattacharya, Aparna, Donachie, Martin, Fujii, Hirosane, Fukui, Akihiko, Itow, Yoshitaka, Hirao, Yuki, Kamei, Yuhei, Kondo, Iona, Koshimoto, Naoki, Li, Man Cheung Alex, Matsubara, Yutaka, Muraki, Yasushi, Miyazaki, Shota, Nagakane, Masayuki, Ranc, Clément, Rattenbury, Nicholas J., Satoh, Yuki, Shoji, Hikaru, Suematsu, Haruno, Sullivan, Denis J., Sumi, Takahiro, Suzuki, Daisuke, Tristram, Paul J., Yamakawa, Takeharu, Yamawaki, Tsubasa, Yonehara, Atsunori

Short-timescale microlensing events are likely to be produced by substellar brown dwarfs (BDs), but it is difficult to securely identify BD lenses based on only event timescales $t_{\rm E}$ because short-timescale events can also be produced by stell

Externí odkaz: http://arxiv.org/abs/1910.10974

$Spitzer$ Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M-dwarf

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

We report the discovery of a $Spitzer$ microlensing planet OGLE-2018-BLG-0596Lb, with preferred planet-host mass ratio $q \sim 2\times10^{-4}$. The planetary signal, which is characterized by a short $(\sim 1~{\rm day})$ "bump" on the rising side of

Externí odkaz: http://arxiv.org/abs/1905.05873

Spectroscopic Mass and Host-star Metallicity Measurements for Newly Discovered Microlensing Planet OGLE-2018-BLG-0740Lb

Autor: Han, Cheongho, Yee, Jennifer C., Udalski, Andrzej, Bond, Ian A., Bozza, Valerio, Cassan, Arnaud, Hirao, Yuki, Dong, Subo, Kollmeier, Juna A., Morrell, Nidia, Boutsia, Konstantina, Albrow, Michael D., Chung, Sun-Ju, Gould, Andrew, Hwang, Kyu-Ha, Lee, Chung-Uk, Ryu, Yoon-Hyun, Shin, In-Gu, Shvartzvald, Yossi, Jung, Youn Kil, Kim, Doeon, Kim, Woong-Tae, Cha, Sang-Mok, Kim, Dong-Jin, Kim, Hyoun-Woo, Hong, Kyeongsoo, Kim, Seung-Lee, Lee, Dong-Joo, Lee, Yongseok, Park, Byeong-Gon, Pogge, Richard W., Zang, Weicheng, Mróz, Przemek, Szymański, Michał K., Skowron, Jan, Poleski, Radek, Soszyński, Igor, Pietrukowicz, Paweł, Kozłowski, Szymon, Ulaczyk, Krzysztof, Rybicki, Krzysztof A., Iwanek, Patryk, Wrona, Marcin, Abe, Fumio, Barry, Richard, Bennett, David P., Bhattacharya, Aparna, Donachie, Martin, Fukui, Akihiko, 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

We report the discovery of the microlensing planet OGLE-2018-BLG-0740Lb. The planet is detected with a very strong signal of $\Delta\chi^2\sim 4630$, but the interpretation of the signal suffers from two types of degeneracies. One type is caused by t

Externí odkaz: http://arxiv.org/abs/1905.00155

OGLE-2017-BLG-1186: first application of asteroseismology and Gaussian processes to microlensing

Autor: Li, Shun-Sheng, Zang, Weicheng, Udalski, Andrzej, Shvartzvald, Yossi, Huber, Daniel, Lee, Chung-Uk, Sumi, Takahiro, Gould, Andrew, Mao, Shude, Fouqué, Pascal, Wang, Tianshu, Dong, Subo, Jørgensen, Uffe G., Cole, Andrew, Mróz, Przemek, Szymański, Michał K., Skowron, Jan, Poleski, Radosław, Soszyński, Igor, Pietrukowicz, Paweł, Kozłowski, Szymon, Ulaczyk, Krzysztof, Rybicki, Krzysztof A., Iwanek, Patryk, Yee, Jennifer C., Novati, Sebastiano Calchi, Beichman, Charles A., Bryden, Geoffery, Carey, Sean, Gaudi, B. Scott, Henderson, Calen B., Zhu, Wei, Albrow, Michael D., Chung, Sun-Ju, Han, Cheongho, Hwang, Kyu-Ha, Jung, Youn Kil, Ryu, Yoon-Hyun, Shin, In-Gu, Cha, Sang-Mok, Kim, Dong-Jin, Kim, Hyoun-Woo, Kim, Seung-Lee, Lee, Dong-Joo, Lee, Yongseok, Park, Byeong-Gon, Pogge, Richard W., Bond, Ian A., Abe, Fumio, Barry, Richard, Bennett, David P., Bhattacharya, Aparna, Donachie, Martin, Fukui, Akihiko, Hirao, Yuki, Itow, Yoshitaka, 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., Suzuki, Daisuke, Tristram, Paul J., Yonehara, Atsunori, Christie, Grant, Drummond, John, Green, Jonathan, Hennerley, Steve, Natusch, Tim, Porritt, Ian, Bachelet, Etienne, Maoz, Dan, Street, Rachel A., Tsapras, Yiannis, Bozza, Valerio, Dominik, Martin, Hundertmark, Markus, Peixinho, Nuno, Sajadian, Sedighe, Burgdorf, Martin J., Evans, Daniel F., Jaimes, Roberto Figuera, Fujii, Yuri I., Haikala, Lauri K., Helling, Christiane, Henning, Thomas, Hinse, Tobias C., Mancini, Luigi, Longa-Peña, Penelope, Rahvar, Sohrab, Rabus, Markus, Skottfelt, Jesper, Snodgrass, Colin, Southworth, John, Unda-Sanzana, Eduardo, von Essen, Carolina, Beaulieu, Jean-Phillipe, Blackman, Joshua, Hill, Kym

We present the analysis of the event OGLE-2017-BLG-1186 from the 2017 Spitzer microlensing campaign. This is a remarkable microlensing event because its source is photometrically bright and variable, which makes it possible to perform an asteroseismi

Externí odkaz: http://arxiv.org/abs/1904.07718