OGLE-2013-BLG-0911Lb: A Secondary on the Brown-Dwarf Planet Boundary around an M-dwarf

Autor: Miyazaki, Shota, Sumi, Takahiro, Bennett, David P., Udalski, Andrzej, Shvartzvald, Yossi, Street, Rachel, Bozza, Valerio, Yee, Jennifer C., Bond, Ian A., Rattenbury, Nicholas, Koshimoto, Naoki, Suzuki, Daisuke, Fukui, Akihiko, Abe, F., Bhattacharya, A., Barry, R., Donachie, M., Fujii, H., Hirao, Y., Itow, Y., Kamei, Y., Kondo, I., Li, M. C. A., Ling, C. H., Matsubara, Y., Matsuo, T., Muraki, Y., Nagakane, M., Ohnishi, K., Ranc, C., Saito, T., Sharan, A., Shibai, H., Suematsu, H., Sullivan, D. J., Tristram, P. J., Yamakawa, T., Yonehara, A., Skowron, J., Poleski, R., Mr'oz, P., Szyma'nski, M. K., Soszy'nski, I., Pietrukowicz, P., KozLowski, S., Ulaczyk, K., Wyrzykowski, L., Friedmann, Matan, Kaspi, Shai, Maoz, Dan, Albrow, M., Christie, G., DePoy, D. L., Gal-Yam, A., Gould, A., Lee, C. -U., Manulis, I., McCormick, J., Natusch, T., Ngan, H., Pogge, R. W., Porritt, I., Tsapras, Y., Bachelet, E., Hundertmark, M. P. G., Dominik, M., Bramich, D. M., Cassan, A., Jaimes, R. Figuera, Horne, K., Schmidt, R., Snodgrass, C., Wambsganss, J., Steele, I. A., Menzies, J., Mao, S., Jorgensen, U. G., Burgdorf, M. J., Ciceri, S., Novati, S. Calchi, D'Ago, G., Evans, D. F., Hinse, T. C., Kains, N., Kerins, E., Korhonen, H., Mancini, L., Popovas, A., Rabus, M., Rahvar, S., Scarpetta, G., Skottfelt, J., Southworth, J., Peixinho, N., Verma, P.

We present the analysis of the binary-lens microlensing event OGLE-2013-BLG-0911. The best-fit solutions indicate the binary mass ratio of q~0.03 which differs from that reported in Shvartzvald+2016. The event suffers from the well-known close/wide d

Externí odkaz: http://arxiv.org/abs/1912.09613

The 2L1S/1L2S Degeneracy for Two Microlensing Planet Candidates Discovered by the KMTNet Survey in 2017

Autor: Shin, I. -G., Yee, J. C., Gould, A., Penny, M. T., Bond, I. A., Albrow, M. D., Chung, S. -J., Han, C., Hwang, K. -H., Jung, Y. K., Ryu, Y. -H., Shvartzvald, Y., 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., Abe, F., Barry, R., Bennett, D. P., Bhattacharya, A., Donachie, M., Fujii, H., Fukui, A., Hirao, Y., Itow, Y., Kamei, Y., Kondo, Iona, Koshimoto, N., Li, M. C. A., Matsubara, Y., Miyazaki, S., Muraki, Y., Nagakane, M., Ranc, C., Rattenbury, N. J., Suematsu, Harmon, Sullivan, D. J., Sumi, T., Suzuki, Daisuke, Tristram, P. J., Yamakawa, T., Yonehara, A., Fouqué, P., Zang, W.

We report two microlensing planet candidates discovered by the KMTNet survey in $2017$. However, both events have the 2L1S/1L2S degeneracy, which is an obstacle to claiming the discovery of the planets with certainty unless the degeneracy can be reso

Externí odkaz: http://arxiv.org/abs/1902.10945

Two new free-floating or wide-orbit planets from microlensing

Autor: Mroz, P., Udalski, A., Bennett, D. P., Ryu, Y. -H., Sumi, T., Shvartzvald, Y., Skowron, J., Poleski, R., Pietrukowicz, P., Kozlowski, S., Szymanski, M. K., Wyrzykowski, L., Soszynski, I., Ulaczyk, K., Rybicki, K., Iwanek, P., Albrow, M. D., Chung, S. -J., Gould, A., Han, C., Hwang, K. -H., Jung, Y. K., Shin, I. -G., 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., Abe, F., Barry, R., Bhattacharya, A., Bond, I. 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., Suzuki, D., Tristram, P. J., Yonehara, A., Maoz, D., Kaspi, S., Friedmann, M.

Publikováno v: A&A 622, A201 (2019)

Planet formation theories predict the existence of free-floating planets that have been ejected from their parent systems. Although they emit little or no light, they can be detected during gravitational microlensing events. Microlensing events cause

Externí odkaz: http://arxiv.org/abs/1811.00441

A study of light travel time effect in short-period MOA eclipsing binaries via eclipse timing

Autor: Li, M. C. A., Rattenbury, N. J., Bond, I. A., Sumi, T., Bennett, D. P., Koshimoto, N., Abe, F., Asakura, Y., Barry, R., Bhattacharya, A., Donachie, M., Evans, P., Fukui, A., Hirao, Y., Itow, Y., Masuda, K., Matsubara, Y., Muraki, Y., Nagakane, M., Ohnishi, K., Saito, To., Sharan, A., Sullivan, D. J., Suzuki, D., Tristram, P. J., Yonehara, A.

Publikováno v: MNRAS, Volume 480, Issue 4, 11 November 2018, Pages 4557-4577

A sample of 542 eclipsing binaries (EBs) with periods shorter than 2 d were selected from the Microlensing Observations in Astrophysics (MOA) EB catalogue (Li et al. 2017) for eclipse-time variation analysis. For this sample we were able to obtain th

Externí odkaz: http://arxiv.org/abs/1804.11272

OGLE-2017-BLG-0482Lb: A Microlensing Super-Earth Orbiting a Low-mass Host Star

Autor: Han, C., Hirao, Y., Udalski, A., Lee, C. -U., Bozza, V., Gould, A., Abe, F., Barry, R., Bond, I. A., Bennett, D. P., Bhattacharya, A., Donachie, M., Evans, P., Fukui, A., Itow, Y., Kawasaki, K., Koshimoto, N., Li, M. C. A., Ling, C. H., Matsubara, Y., Miyazaki, S., Munakata, H., Muraki, Y., Nagakane, M., Ohnishi, K., Ranc, C., Rattenbury, N., Saito, T., Sharan, A., Sullivan, D. J., Sumi, T., Suzuki, D., Tristram, P. J., Yamada, T., Yonehara, A., Mróz, P., Poleski, R., Kozłowski, S., Soszyński, I., Pietrukowicz, P., Skowron, J., Szymańsk, M. K., Ulaczyk, K., Pawlak, M., Rybicki, K., Iwanek, P., Albrow, M. D., Chung, S. -J., Hwang, K. -H., Jung, Y. K., Kim, D., Kim, W. -T., Kim, H. -W., Ryu, Y. -H., Shin, I. -G., Shvartzvald, Y., Yee, J. C., Zhu, W., Cha, S. -M., Kim, S. -L., Kim, D. -J., Lee, D. -J., Lee, Y., Park, B. -G., Pogge, R. W.

We report the discovery of a planetary system in which a super-earth orbits a late M-dwarf host. The planetary system was found from the analysis of the microlensing event OGLE-2017-BLG-0482, wherein the planet signal appears as a short-term anomaly

Externí odkaz: http://arxiv.org/abs/1803.10830