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 Online-Ressource | |
| Verfasst von: | Wang, Tianyu [VerfasserIn]  |
| Tsapras, Yiannis [VerfasserIn] | |
| Hundertmark, Markus [VerfasserIn] | |
| Wambsganß, Joachim [VerfasserIn] | |
| Schmidt, Robert W. [VerfasserIn] | |
| Titel: | Ground-based parallax confirmed by Spitzer |
| Titelzusatz: | binary microlensing event MOA-2015-BLG-020 |
| Verf.angabe: | Tianshu Wang, Wei Zhu, Shude Mao, I.A. Bond, A. Gould, A. Udalski, T. Sumi, V. Bozza, C. Ranc, A. Cassan, J.C. Yee, C. Han, F. Abe, Y. Asakura, R. Barry, D.P. Bennett, A. Bhattacharya, M. Donachie, P. Evans, A. Fukui, Y. Hirao, Y. Itow, K. Kawasaki, N. Koshimoto, M.C.A. Li, C.H. Ling, K. Masuda, Y. Matsubara, S. Miyazaki, Y. Muraki, M. Nagakane, K. Ohnishi, N. Rattenbury, To Saito, A. Sharan, H. Shibai, D.J. Sullivan, D. Suzuki, P.J. Tristram, T. Yamada, A. Yonehara, M. Pawlak, P. Pietrukowicz, R. Poleski, J. Skowron, I. Soszynski, S. KozLowski, P. Mroz, K. Ulaczyk, M.K. Szymanski, C. Beichman, G. Bryden, S. Calchi Novati, S. Carey, M. Fausnaugh, B.S. Gaudi, C.B. Henderson, Y. Shvartzvald, B. Wibking, M.D. Albrow, S.-J. Chung, K.-H. Hwang, Y.K. Jung, Y.-H. Ryu, I.-G. Shin, S.-M. Cha, D.-J. Kim, H.-W. Kim, S.-L. Kim, C.-U. Lee, Y. Yee, B.-G. Park, R.W. Pogge, R.A. Street, Y. Tsapras, M. Hundertmark, E. Bachelet, M. Dominik, K. Horne, R. Figuera Jaimes, J. Wambsganss, D.M. Bramich,R. Schmidt, C. Snodgrass, I.A. Steele, and J. Menzies |
| Fussnoten: | Gesehen am 18.10.2017 |
| Titel Quelle: | Enthalten in: De.arxiv.org |
| Jahr Quelle: | 2017 |
| Band/Heft Quelle: | (2017) Artikel-Nummer 1707.07737, 16 Seiten |
| Abstract: | We present the analysis of the binary gravitational microlensing event MOA-2015-BLG-020. The event has a fairly long timescale (about 63 days) and thus the light curve deviates significantly from the lensing model that is based on the rectilinear lens-source relative motion. This enables us to measure the microlensing parallax through the annual parallax effect. The microlensing parallax parameters constrained by the ground-based data are confirmed by the Spitzer observations through the satellite parallax method. By additionally measuring the angular Einstein radius from the analysis of the resolved caustic crossing, the physical parameters of the lens are determined. It is found that the binary lens is composed of two dwarf stars with masses $M_1 = 0.606 \pm 0.028M_\odot$ and $M_2 = 0.125 \pm 0.006M_\odot$ in the Galactic disk. Assuming the source star is at the same distance as the bulge red clump stars, we find the lens is at a distance $D_L = 2.44 \pm 0.10 kpc$. In the end, we provide a summary and short discussion of all published microlensing events in which the annual parallax effect is confirmed by other independent observations. |
| DOI: | doi:10.3847/1538-4357/aa813b |
| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt. Kostenfrei: Verlag: http://arxiv.org/abs/1707.07737 |
| DOI: https://doi.org/10.3847/1538-4357/aa813b | |
| Datenträger: | Online-Ressource |
| Sprache: | eng |
| K10plus-PPN: | 1564524906 |
| Verknüpfungen: | → Sammelwerk |
