Mass Measurements of Isolated Objects from Space-Based Microlensing

  title={Mass Measurements of Isolated Objects from Space-Based Microlensing},
  author={Wei Zhu and Sebastiano Calchi Novati and Andrew Gould and Andrzej Udalski and Changhwa Han and Yossi Shvartzvald and Cl'ement Ranc and Uffe Graae Jorgensen and Rados law Poleski and Valerio Bozza and C. Beichman and Geoffery Bryden and S. Carey and B. Scott Gaudi and C. Michael B. Henderson and Richard W. Pogge and Ian Porritt and Benjamin D. Wibking and J. C. Yee and Mariusz Pawlak and Michał K Szymański and Jan Skowron and Przemek Mr{\'o}z and Szymon Kozłowski and Lukasz Wyrzykowski and Paweł Pietrukowicz and Grzegorz Pietrzy'nski and Igor Soszyński and K. Ulaczyk and J. Y. Choi and H. Park and Y. K. Jung and I.-G. Shin and Michael D. Albrow and B.-G. Park and S. Kim and C.-U. Lee and Dj Kim and Y. Lee and Matan Friedmann and Shai Kaspi and Dani Maoz and M. P. G. Hundertmark and Rachel A. Street and Y. Tsapras and Daniel M. Bramich and Arnaud Cassan and M. Dominik and Etienne Bachelet and Subo Dong and Roberto Figuera Jaimes and Keith Horne and S. Mao and Jd Menzies and Ralf Schmidt and C Snodgrass and Iain A. Steele and Joachim Wambsganss and Jesper Skottfelt and Michael Andersen and Martin Burgdorf and Simona Ciceri and Giuseppe D'ago and D. Fennell Evans and S.-H. Gu and Tobias Cornelius Hinse and Eamonn Kerins and Heidi Korhonen and Michael Kuffmeier and Luigi Mancini and Nuno Peixinho and Andrius Popovas and Markus Rabus and Sohrab Rahvar and Ren{\'e} Tronsgaard Rasmussen and Gaetano Scarpetta and John Southworth and Jean Surdej and Carolina von Essen and Y.-B. Wang and Olivier Wertz},
  journal={The Astrophysical Journal},
  • Wei Zhu, Sebastiano Calchi Novati, +78 authors Olivier Wertz
  • Published 2016
  • Physics
  • The Astrophysical Journal
  • We report on the mass and distance measurements of two single-lens events from the 2015 Spitzer microlensing campaign. With both finite-source effect and microlens parallax measurements, we find that the lens of OGLE-2015-BLG-1268 is very likely a brown dwarf (BD). Assuming that the source star lies behind the same amount of dust as the Bulge red clump, we find the lens is a 45 ± 7 M_J BD at 5.9 ± 1.0 kpc. The lens of of the second event, OGLE-2015-BLG-0763, is a 0.50 ± 0.04 M_M☉ star at 6.9… CONTINUE READING

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