تقرير
OGLE-2014-BLG-0962 and a Comparison of Galactic Model Priors to Microlensing Data
| العنوان: | OGLE-2014-BLG-0962 and a Comparison of Galactic Model Priors to Microlensing Data |
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| المؤلفون: | Yutong Shan, Jennifer C. Yee, Andrzej Udalski, Ian A. Bond, Yossi Shvartzvald, In-Gu Shin, Youn-Kil Jung, Sebastiano Calchi Novati, Charles A. Beichman, Sean Carey, B. Scott Gaudi, Andrew Gould, Richard W. Pogge, Radoslaw Poleski, Jan Skowron, Szymon Kozłowski, Przemyslaw Mroz, Pawel Pietrukowicz, Michal K. Szymanski, Igor Soszynski, Krzysztof Ulaczyk, Lukasz Wyrzykowski, Fumio Abe, Richard K Barry, David P Pearson, Aparna Bhattacharya, Martin Donachie, Akihiko Fukui, Yuki Hirao, Yoshitaka Itow, Kohei Kawasaki, Iona Kondo, Naoki Koshimoto, Man Cheung Alex Li, Yutaka Matsubara, Yasushi Muraki, Shota Miyazaki, Masayuki Nagakane, Clement Ranc, Nicholas J. Rattenbury, Haruno Suematsu, Denis J. Sullivan, Takahiro Sumi, Daisuke Suzuki, Paul J. Tristram, Atsunori Yonehara, Dan Maoz, Shai Kaspi, Matan Friedmann |
| المصدر: | The Astrophysical Journal. 873(30) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Astrophysics |
| الوصف: | OGLE-2014-BLG-0962 (OB140962) is a stellar binary microlensing event that was well covered by observations from the Spitzer satellite as well as ground-based surveys. Modeling yields a unique physical solution: a mid-M+M-dwarf binary with M(prim) = 0.20 ± 0.01 M(☉) and M(sec) = 0.16 ± 0.01 M(☉), with projected separation of 2.0 ± 0.3 au. The lens is only D(LS) = 0.41 ± 0.06 kpc in front of the source, making OB140962 a bulge lens and the most distant Spitzer binary lens to date. In contrast, because the Einstein radius (θ(E) = 0.143 ± 0.007 mas) is unusually small, a standard Bayesian analysis, conducted in the absence of parallax information, would predict a brown dwarf binary. We compare the results of Bayesian analysis using two commonly used Galactic model priors to the measured values for a set of Spitzer lenses. We find all models tested predict lens properties consistent with the Spitzer data. Furthermore, we illustrate the methodology for probing the Galactic distribution of planets by comparing the cumulative distance distribution of the Spitzer two-body lenses to that of the Spitzer single lenses. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1538-4357 0004-637X |
| DOI: | 10.3847/1538-4357/ab0021 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20205002361 |
| ملاحظات: | 134180.04.04.01 JSPS24253004 JSPS26247023 JSPS23340064 JSPS15H00781 I-CORE-ISF 1829/12 |
| رقم الأكسشن: | edsnas.20205002361 |
| قاعدة البيانات: | NASA Technical Reports |
| تدمد: | 15384357 0004637X |
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| DOI: | 10.3847/1538-4357/ab0021 |