Systematic KMTNet Planetary Anomaly Search. X. Complete Sample of 2017 Prime-field Planets

March 2024 • 2024AJ....167...88R

Authors • Ryu, Yoon-Hyun • Udalski, Andrzej • Yee, Jennifer C. • Zang, Weicheng • Shvartzvald, Yossi • Han, Cheongho • Gould, Andrew • Albrow, Michael D. • Chung, Sun-Ju • Hwang, Kyu-Ha • Jung, Youn Kil • Shin, In-Gu • Yang, Hongjing • Cha, Sang-Mok • Kim, Dong-Jin • Kim, Seung-Lee • Lee, Chung-Uk • Lee, Dong-Joo • Lee, Yongseok • Park, Byeong-Gon • Pogge, Richard W. • Wang, Hanyue • KMTNet Collaboration • Mróz, Przemek • Szymański, Michał K. • Skowron, Jan • Poleski, Radek • Soszyński, Igor • Pietrukowicz, Paweł • Kozłowski, Szymon • Ulaczyk, Krzysztof • Rybicki, Krzysztof A. • Iwanek, Patryk • Wrona, Marcin • OGLE Collaboration • Beichman, Charles • Bryden, Geoffry • Carey, Sean • Henderson, Calen B. • Calchi Novati, Sebastiano • Zhu, Wei • SPITZER Team • Jacklin, Savannah • Penny, Matthew T. • UKIRT Team

Abstract • We complete the analysis of planetary candidates found by the KMT AnomalyFinder for the 2017 prime fields that cover ∼13 deg². We report three unambiguous planets: OGLE-2017-BLG-0640, OGLE-2017-BLG-1275, and OGLE-2017-BLG-1237. The first two of these were not previously identified, while the last was not previously published due to technical complications induced by a nearby variable. We further report that a fourth anomalous event, the previously recognized OGLE-2017-BLG-1777, is very likely to be planetary, although its light curve requires unusually complex modeling because the lens and source both have orbiting companions. One of the three unambiguous planets, OGLE-2017-BLG-1275, is the first AnomalyFinder discovery that has a Spitzer microlens parallax measurement, π _E ≃ 0.045 ± 0.015, implying that this planetary system almost certainly lies in the Galactic bulge. In the order listed, the four planetary events have planet-host mass ratios q and normalized projected separations s of $(\mathrm{log}q,s)=(-2.31,0.61)$ , (‑2.06, 0.63/1.09), (‑2.10, 1.04), and (‑2.86, 0.72). Combined with previously published events, the 2017 prime fields contain 11 unambiguous planets with well-measured q and one very likely candidate, of which three are AnomalyFinder discoveries. In addition to these 12, there are three other unambiguous planets with large uncertainties in q.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2024AJ....167...88R
• PREPRINT http://arxiv.org/abs/2307.13359
• ELECTR https://doi.org/10.3847%2F1538-3881%2Fad1888