Gaia21blx: Complete resolution of a binary microlensing event in the Galactic disk Article Swipe
P. Rota
,
V. Bozza
,
M. Hundertmark
,
E. Bachelet
,
R. A. Street
,
Y. Tsapras
,
A. Cassan
,
M. Dominik
,
R. Figuera Jaimes
,
Krzysztof A. Rybicki
,
J. Wambsganß
,
Ł. Wyrzykowski
,
Paweł Zieliński
,
M. Bonavita
,
T. C. Hinse
,
U. G. Jørgensen
,
Elahe Khalouei
,
H. Korhonen
,
Penélope Longa-Peña
,
N. Peixinho
,
S. Rahvar
,
Sedighe Sajadian
,
J. Skottfelt
,
C. Snodgrass
,
J. Tregolan-Reed
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1051/0004-6361/202347807
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1051/0004-6361/202347807
Context . Gravitational microlensing is a method that is used to discover planet-hosting systems at distances of several kiloparsec in the Galactic disk and bulge. We present the analysis of a microlensing event reported by the Gaia photometric alert team that might have a bright lens. Aims . In order to infer the mass and distance to the lensing system, the parallax measurement at the position of Gaia21blx was used. In this particular case, the source and the lens have comparable magnitudes and we cannot attribute the parallax measured by Gaia to the lens or source alone. Methods . Since the blending flux is important, we assumed that the Gaia parallax is the flux-weighted average of the parallaxes of the lens and source. Combining this assumption with the information from the microlensing models and the finite source effects we were able to resolve all degeneracies and thus obtained the mass, distance, luminosities and projected kinematics of the binary lens and the source. Results . According to the best model, the lens is a binary system at 2.18 ± 0.07 kpc from Earth. It is composed of a G star with 0.95 ± 0.17 M ⊙ and a K star with 0.53 ± 0.07 M ⊙ . The source is likely to be an F subgiant star at 2.38 ± 1.71 kpc with a mass of 1.10 ± 0.18 M ⊙ . Both lenses and the source follow the kinematics of the thin-disk population. We also discuss alternative models, that are disfavored by the data or by prior expectations, however.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://doi.org/10.1051/0004-6361/202347807
- OA Status
- hybrid
- References
- 77
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4394672844
All OpenAlex metadata
Raw OpenAlex JSON
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https://openalex.org/W4394672844Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1051/0004-6361/202347807Digital Object Identifier
- Title
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Gaia21blx: Complete resolution of a binary microlensing event in the Galactic diskWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-04-15Full publication date if available
- Authors
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P. Rota, V. Bozza, M. Hundertmark, E. Bachelet, R. A. Street, Y. Tsapras, A. Cassan, M. Dominik, R. Figuera Jaimes, Krzysztof A. Rybicki, J. Wambsganß, Ł. Wyrzykowski, Paweł Zieliński, M. Bonavita, T. C. Hinse, U. G. Jørgensen, Elahe Khalouei, H. Korhonen, Penélope Longa-Peña, N. Peixinho, S. Rahvar, Sedighe Sajadian, J. Skottfelt, C. Snodgrass, J. Tregolan-ReedList of authors in order
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https://doi.org/10.1051/0004-6361/202347807Publisher landing page
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://doi.org/10.1051/0004-6361/202347807Direct OA link when available
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Gravitational microlensing, Event (particle physics), Binary number, Astrophysics, Resolution (logic), Physics, Astronomy, Computer science, Mathematics, Galaxy, Artificial intelligence, ArithmeticTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
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77Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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