SPITZER AS A MICROLENS PARALLAX SATELLITE: MASS AND DISTANCE MEASUREMENTS OF BINARY LENS SYSTEM OGLE-2014-BLG-1050L Academic Article uri icon

abstract

  • 2015. The American Astronomical Society. All rights reserved. We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method. Spitzer captured the second caustic crossing of the event, which occurred 10 days before that seen from Earth. Due to the coincidence that the source-lens relative motion was almost parallel to the direction of the binary-lens axis, the fourfold degeneracy, which was known before only to occur in single-lens events, persists in this case, leading to either a lower-mass (0.2 and 0.07 M) binary at 1.1 kpc or a higher-mass (0.9 and 0.35M) binary at 3.5 kpc. However, the latter solution is strongly preferred for reasons including blending and lensing probability. OGLE-2014-BLG-1050 L demonstrates the power of microlens parallax in probing stellar and substellar binaries.

published proceedings

  • ASTROPHYSICAL JOURNAL

altmetric score

  • 9.25

author list (cited authors)

  • Zhu, W., Udalski, A., Gould, A., Dominik, M., Bozza, V., Han, C., ... Jeong, J.

citation count

  • 47

complete list of authors

  • Zhu, Wei||Udalski, A||Gould, A||Dominik, M||Bozza, V||Han, C||Yee, JC||Novati, S Calchi||Beichman, CA||Carey, S||Poleski, R||Skowron, J||Kozlowski, S||Mroz, P||Pietrukowicz, P||Pietrzynski, G||Szymanski, MK||Soszynski, I||Ulaczyk, K||Wyrzykowski, L||Gaudi, BS||Pogge, RW||DePoy, DL||Jung, YK||Choi, J-Y||Hwang, K-H||Shin, I-G||Park, H||Jeong, J

publication date

  • May 2015