Ogle-2018-blg-0677lb: A super earth near the galactic bulge
| العنوان: | Ogle-2018-blg-0677lb: A super earth near the galactic bulge |
|---|---|
| المؤلفون: | Antonio Herrera-Martín, Y. K. Jung, C.-U. Lee, M. Wrona, Sang-Mok Cha, Yoon-Hyun Ryu, Andrew Gould, P. Pietrukowicz, Radosław Poleski, S. J. Chung, Igor Soszyński, S. Kozlowski, Jennifer C. Yee, In-Gu Shin, Andrzej Udalski, Michał K. Szymański, Krzysztof A. Rybicki, Patryk Iwanek, Shinyoung Kim, Przemek Mróz, Byeong-Gon Park, Jan Skowron, Kyu-Ha Hwang, Hong-Seok Kim, Richard W. Pogge, C. Han, Krzysztof Ulaczyk, Weicheng Zang, Yossi Shvartzvald, D.-J. Kim, Yongseok Lee, Michael D. Albrow, Duk-Hang Lee |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Earth and Planetary Astrophysics (astro-ph.EP), Super-Earth, 010504 meteorology & atmospheric sciences, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Mass ratio, Light curve, Gravitational microlensing, 01 natural sciences, Astrophysics - Astrophysics of Galaxies, Exoplanet, Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Bulge, Planet, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences, Astrophysics - Earth and Planetary Astrophysics |
| الوصف: | We report the analysis of the microlensing event OGLE-2018-BLG-0677. A small feature in the light curve of the event leads to the discovery that the lens is a star-planet system. Although there are two degenerate solutions that could not be distinguished for this event, both lead to a similar planet-host mass ratio. We perform a Bayesian analysis based on a Galactic model to obtain the properties of the system and find that the planet corresponds to a super-Earth/sub-Neptune with a mass $M_{\mathrm{planet}} = {3.96}^{+5.88}_{-2.66}\mathrm{M_\oplus}$. The host star has a mass $ M_{\mathrm{host}} = {0.12}^{+0.14}_{-0.08}\mathrm{M_\odot}$. The projected separation for the inner and outer solutions are ${0.63}^{+0.20}_{-0.17}$~AU and ${0.72}^{+0.23}_{-0.19}$~AU respectively. At $\Delta\chi^2=\chi^2({\rm 1L1S})-\chi^2({\rm 2L1S})=46$, this is by far the lowest $\Delta\chi^2$ for any securely-detected microlensing planet to date, a feature that is closely connected to the fact that it is detected primarily via a "dip" rather than a "bump". Comment: 15 page, 12 figures, Published in AJ |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e0190cb34be300acc43321ec2a97f0f http://arxiv.org/abs/2003.02983 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....8e0190cb34be300acc43321ec2a97f0f |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |