Mass Measurements of Isolated Objects from Space-based Microlensing
Research output: Contribution to journal › Journal article › Research › peer-review
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}⊙ star
at 6.9 ± 1.0 kpc. We show that the probability to definitively
measure the mass of isolated microlenses is dramatically increased once
simultaneous ground- and space-based observations are conducted.
Original language | English |
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Article number | 60 |
Journal | Astrophysical Journal |
Volume | 825 |
Issue number | 1 |
ISSN | 0004-637X |
DOIs | |
Publication status | Published - 1 Jul 2016 |
- brown dwarfs, gravitational lensing: micro, stars: fundamental parameters
Research areas
ID: 170455659