OGLE-2007-BLG-224L: A Direct Test of Terrestrial Parallax

Yutong Shan; Jennifer C. Yee; Vanessa P. Bailey; Laird M. Close; Phil M. Hinz; Jared R. Males; Katie M. Morzinski

doi:10.3847/1538-4357/abd6c3

OGLE-2007-BLG-224L: A Direct Test of Terrestrial Parallax

Yutong Shan, Jennifer C. Yee, Vanessa P. Bailey, Laird M. Close, Phil M. Hinz, Jared R. Males, Katie M. Morzinski

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

2 Scopus citations

Abstract

We present limits on the lens flux of OGLE-2007-BLG-224 based on MagAO imaging taken seven years after the microlensing event. At the time of the observations, the lens should have been separated from the microlensing source by 292 mas. However, no new sources are detected with MagAO. We place an upper limit on the lens flux of H > 20.57. This measurement supports the conclusion of Gould et al. that the lens in this event should be a brown dwarf. This is the first test of a prediction based on the terrestrial microlens parallax effect and the first AO confirmation of a substellar/dark microlens.

Original language	English (US)
Article number	240
Journal	Astrophysical Journal
Volume	908
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/abd6c3
State	Published - Feb 20 2021

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "OGLE-2007-BLG-224L: A Direct Test of Terrestrial Parallax",

abstract = "We present limits on the lens flux of OGLE-2007-BLG-224 based on MagAO imaging taken seven years after the microlensing event. At the time of the observations, the lens should have been separated from the microlensing source by 292 mas. However, no new sources are detected with MagAO. We place an upper limit on the lens flux of H > 20.57. This measurement supports the conclusion of Gould et al. that the lens in this event should be a brown dwarf. This is the first test of a prediction based on the terrestrial microlens parallax effect and the first AO confirmation of a substellar/dark microlens.",

author = "Yutong Shan and Yee, {Jennifer C.} and Bailey, {Vanessa P.} and Close, {Laird M.} and Hinz, {Phil M.} and Males, {Jared R.} and Morzinski, {Katie M.}",

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language = "English (US)",

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TY - JOUR

T1 - OGLE-2007-BLG-224L

T2 - A Direct Test of Terrestrial Parallax

AU - Shan, Yutong

AU - Yee, Jennifer C.

AU - Bailey, Vanessa P.

AU - Close, Laird M.

AU - Hinz, Phil M.

AU - Males, Jared R.

AU - Morzinski, Katie M.

PY - 2021/2/20

Y1 - 2021/2/20

N2 - We present limits on the lens flux of OGLE-2007-BLG-224 based on MagAO imaging taken seven years after the microlensing event. At the time of the observations, the lens should have been separated from the microlensing source by 292 mas. However, no new sources are detected with MagAO. We place an upper limit on the lens flux of H > 20.57. This measurement supports the conclusion of Gould et al. that the lens in this event should be a brown dwarf. This is the first test of a prediction based on the terrestrial microlens parallax effect and the first AO confirmation of a substellar/dark microlens.

AB - We present limits on the lens flux of OGLE-2007-BLG-224 based on MagAO imaging taken seven years after the microlensing event. At the time of the observations, the lens should have been separated from the microlensing source by 292 mas. However, no new sources are detected with MagAO. We place an upper limit on the lens flux of H > 20.57. This measurement supports the conclusion of Gould et al. that the lens in this event should be a brown dwarf. This is the first test of a prediction based on the terrestrial microlens parallax effect and the first AO confirmation of a substellar/dark microlens.

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M3 - Article

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VL - 908

JO - Astrophysical Journal

JF - Astrophysical Journal

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M1 - 240

ER -

OGLE-2007-BLG-224L: A Direct Test of Terrestrial Parallax

Abstract

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