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Zhu, W, Novati, SC, Gould, A, Udalski, A, Han, C, Shvartzvald, Y, Ranc, C, Jorgensen, UG, Poleski, R, Bozza, V, Beichman, C, Bryden, G, Carey, S, Gaudi, BS, Henderson, CB, Pogge, RW, Porritt, I, Wibking, B, Yee, JC, Pawlak, M et al (2016) MASS MEASUREMENTS OF ISOLATED OBJECTS FROM SPACE-BASED MICROLENSING. ASTROPHYSICAL JOURNAL, 825 (1). ISSN 0004-637X
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Abstract
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 MJ 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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 0201 Astronomical And Space Sciences, 0305 Organic Chemistry, 0306 Physical Chemistry (Incl. Structural) |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Astrophysics Research Institute |
| Publisher: | IOP PUBLISHING LTD |
| Related URLs: | |
| Date of acceptance: | 21 April 2016 |
| Date of first compliant Open Access: | 7 October 2016 |
| Date Deposited: | 07 Oct 2016 09:05 |
| Last Modified: | 02 Aug 2022 14:27 |
| DOI or ID number: | 10.3847/0004-637X/825/1/60 |
| URI: | https://ljmu-9.eprints-hosting.org/id/eprint/4263 |
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