OGLE-2014-BLG-1112LB: a microlensing brown dwarf detected through the channel of a gravitational binary-lens event

C. Han; A. Udalski; V. Bozza; M. K. Szymański; I. Soszyński; J. Skowron; P. Mróz; R. Poleski; P. Pietrukowicz; S. Kozłowski; K. Ulaczyk; Ł. Wyrzykowski; S. Calchi Novati; G. D’Ago; M. Dominik; M. Hundertmark; U. G. Jorgensen; G. Scarpetta

doi:10.3847/1538-4357/aa762f

OGLE-2014-BLG-1112LB: a microlensing brown dwarf detected through the channel of a gravitational binary-lens event

C. Han, A. Udalski, V. Bozza, M. K. Szymański, I. Soszyński, J. Skowron, P. Mróz, R. Poleski, P. Pietrukowicz, S. Kozłowski, K. Ulaczyk, Ł. Wyrzykowski, S. Calchi Novati, G. D’Ago, M. Dominik, M. Hundertmark, U. G. Jorgensen, G. Scarpetta

Research output: Contribution to journal › Article › peer-review

Abstract

Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object. In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of (3.03 ± 0.78) × 10^-2 M_⊙ and it is orbiting a solar-type primary star with a mass of 1.07 ± 0.28 M_⊙. The estimated projected separation between the lens components is 9.63 ± 1.33 au and the distance to the lens is 4.84 ± 0.67 kpc. We discuss the usefulness of space-based microlensing observations for detecting brown dwarfs through the channel of binary-lens events.

Original language	English
Article number	87
Number of pages	8
Journal	Astrophysical Journal
Volume	843
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/aa762f
Publication status	Published - 6 Jul 2017

Keywords

Binaries: general
Brown dwarfs
Gravitational lensing: micro

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Dominik_2017_AJ_Microlensing_FinalPubVersion
© 2017 The American Astronomical Society. All rights reserved. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://doi.org/10.3847/1538-4357/aa762f
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Han, C., Udalski, A., Bozza, V., Szymański, M. K., Soszyński, I., Skowron, J., Mróz, P., Poleski, R., Pietrukowicz, P., Kozłowski, S., Ulaczyk, K., Wyrzykowski, Ł., Novati, S. C., D’Ago, G., Dominik, M., Hundertmark, M., Jorgensen, U. G., & Scarpetta, G. (2017). OGLE-2014-BLG-1112LB: a microlensing brown dwarf detected through the channel of a gravitational binary-lens event. Astrophysical Journal, 843(2), Article 87. https://doi.org/10.3847/1538-4357/aa762f

@article{add2c5ebfc014fc8a924ae18f30221dd,

title = "OGLE-2014-BLG-1112LB: a microlensing brown dwarf detected through the channel of a gravitational binary-lens event",

abstract = "Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object. In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of (3.03 ± 0.78) × 10-2 M⊙ and it is orbiting a solar-type primary star with a mass of 1.07 ± 0.28 M⊙. The estimated projected separation between the lens components is 9.63 ± 1.33 au and the distance to the lens is 4.84 ± 0.67 kpc. We discuss the usefulness of space-based microlensing observations for detecting brown dwarfs through the channel of binary-lens events.",

keywords = "Binaries: general, Brown dwarfs, Gravitational lensing: micro",

author = "C. Han and A. Udalski and V. Bozza and Szyma{\'n}ski, {M. K.} and I. Soszy{\'n}ski and J. Skowron and P. Mr{\'o}z and R. Poleski and P. Pietrukowicz and S. Koz{\l}owski and K. Ulaczyk and {\L}. Wyrzykowski and Novati, {S. Calchi} and G. D{\textquoteright}Ago and M. Dominik and M. Hundertmark and Jorgensen, {U. G.} and G. Scarpetta",

note = "Work by C. Han was supported by the grant 2017R1A4A1015178 of the National Research Foundation of Korea. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A. Udalski.",

year = "2017",

month = jul,

day = "6",

doi = "10.3847/1538-4357/aa762f",

language = "English",

volume = "843",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Han, C, Udalski, A, Bozza, V, Szymański, MK, Soszyński, I, Skowron, J, Mróz, P, Poleski, R, Pietrukowicz, P, Kozłowski, S, Ulaczyk, K, Wyrzykowski, Ł, Novati, SC, D’Ago, G, Dominik, M, Hundertmark, M, Jorgensen, UG & Scarpetta, G 2017, 'OGLE-2014-BLG-1112LB: a microlensing brown dwarf detected through the channel of a gravitational binary-lens event', Astrophysical Journal, vol. 843, no. 2, 87. https://doi.org/10.3847/1538-4357/aa762f

TY - JOUR

T1 - OGLE-2014-BLG-1112LB

T2 - a microlensing brown dwarf detected through the channel of a gravitational binary-lens event

AU - Han, C.

AU - Udalski, A.

AU - Bozza, V.

AU - Szymański, M. K.

AU - Soszyński, I.

AU - Skowron, J.

AU - Mróz, P.

AU - Poleski, R.

AU - Pietrukowicz, P.

AU - Kozłowski, S.

AU - Ulaczyk, K.

AU - Wyrzykowski, Ł.

AU - Novati, S. Calchi

AU - D’Ago, G.

AU - Dominik, M.

AU - Hundertmark, M.

AU - Jorgensen, U. G.

AU - Scarpetta, G.

N1 - Work by C. Han was supported by the grant 2017R1A4A1015178 of the National Research Foundation of Korea. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A. Udalski.

PY - 2017/7/6

Y1 - 2017/7/6

N2 - Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object. In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of (3.03 ± 0.78) × 10-2 M⊙ and it is orbiting a solar-type primary star with a mass of 1.07 ± 0.28 M⊙. The estimated projected separation between the lens components is 9.63 ± 1.33 au and the distance to the lens is 4.84 ± 0.67 kpc. We discuss the usefulness of space-based microlensing observations for detecting brown dwarfs through the channel of binary-lens events.

AB - Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs. However, the number of identified brown dwarfs is limited due to the difficulty of the lens mass measurement that is needed to check the substellar nature of the lensing object. In this work, we report a microlensing brown dwarf discovered from an analysis of the gravitational binary-lens event OGLE-2014-BLG-1112. We identify the brown dwarf nature of the lens companion by measuring the lens mass from the detections of both microlens-parallax and finite-source effects. We find that the companion has a mass of (3.03 ± 0.78) × 10-2 M⊙ and it is orbiting a solar-type primary star with a mass of 1.07 ± 0.28 M⊙. The estimated projected separation between the lens components is 9.63 ± 1.33 au and the distance to the lens is 4.84 ± 0.67 kpc. We discuss the usefulness of space-based microlensing observations for detecting brown dwarfs through the channel of binary-lens events.

KW - Binaries: general

KW - Brown dwarfs

KW - Gravitational lensing: micro

U2 - 10.3847/1538-4357/aa762f

DO - 10.3847/1538-4357/aa762f

M3 - Article

SN - 0004-637X

VL - 843

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 87

ER -

OGLE-2014-BLG-1112LB: a microlensing brown dwarf detected through the channel of a gravitational binary-lens event

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Keywords

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