Investigating the Binary Source Degeneracy for Wide-orbit Planets
Wide-orbit planets are particularly sensitive to detection by the Roman Galactic Bulge Time Domain Survey (GBTDS). This study investigates the degeneracy of these events with binary sources, focusing on how observation cadence affects the resolution of these degeneracies. We analyzed the impact of v...
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IOP Publishing
2025-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/adeb76 |
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| author | Parisa Sangtarash Jennifer C. Yee |
| author_facet | Parisa Sangtarash Jennifer C. Yee |
| author_sort | Parisa Sangtarash |
| collection | DOAJ |
| description | Wide-orbit planets are particularly sensitive to detection by the Roman Galactic Bulge Time Domain Survey (GBTDS). This study investigates the degeneracy of these events with binary sources, focusing on how observation cadence affects the resolution of these degeneracies. We analyzed the impact of various cadences from ${(3.6\,{\mathrm{minutes}})}^{-1}$ to (5 hr) ^−1 , which encompasses planned cadences for both the GBTDS and cadences used by ground-based surveys like KMTNet. The results show that a $\sim {(15\,{\mathrm{minutes}})}^{-1}$ cadence is generally sufficient to resolve this degeneracy unless the source star is a giant ( ρ ≳ 0.01). |
| format | Article |
| id | doaj-art-b139dd9c347d4e99a6a2bdd90266a194 |
| institution | DOAJ |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj-art-b139dd9c347d4e99a6a2bdd90266a1942025-08-20T03:07:37ZengIOP PublishingThe Astronomical Journal1538-38812025-01-01170314110.3847/1538-3881/adeb76Investigating the Binary Source Degeneracy for Wide-orbit PlanetsParisa Sangtarash0https://orcid.org/0009-0007-4190-1269Jennifer C. Yee1https://orcid.org/0000-0001-9481-7123Department of Physics, Isfahan University of Technology , Isfahan 84156-83111, IranCenter for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA ; jyee@cfa.harvard.eduWide-orbit planets are particularly sensitive to detection by the Roman Galactic Bulge Time Domain Survey (GBTDS). This study investigates the degeneracy of these events with binary sources, focusing on how observation cadence affects the resolution of these degeneracies. We analyzed the impact of various cadences from ${(3.6\,{\mathrm{minutes}})}^{-1}$ to (5 hr) ^−1 , which encompasses planned cadences for both the GBTDS and cadences used by ground-based surveys like KMTNet. The results show that a $\sim {(15\,{\mathrm{minutes}})}^{-1}$ cadence is generally sufficient to resolve this degeneracy unless the source star is a giant ( ρ ≳ 0.01).https://doi.org/10.3847/1538-3881/adeb76Gravitational microlensing exoplanet detectionBinary source microlensing |
| spellingShingle | Parisa Sangtarash Jennifer C. Yee Investigating the Binary Source Degeneracy for Wide-orbit Planets The Astronomical Journal Gravitational microlensing exoplanet detection Binary source microlensing |
| title | Investigating the Binary Source Degeneracy for Wide-orbit Planets |
| title_full | Investigating the Binary Source Degeneracy for Wide-orbit Planets |
| title_fullStr | Investigating the Binary Source Degeneracy for Wide-orbit Planets |
| title_full_unstemmed | Investigating the Binary Source Degeneracy for Wide-orbit Planets |
| title_short | Investigating the Binary Source Degeneracy for Wide-orbit Planets |
| title_sort | investigating the binary source degeneracy for wide orbit planets |
| topic | Gravitational microlensing exoplanet detection Binary source microlensing |
| url | https://doi.org/10.3847/1538-3881/adeb76 |
| work_keys_str_mv | AT parisasangtarash investigatingthebinarysourcedegeneracyforwideorbitplanets AT jennifercyee investigatingthebinarysourcedegeneracyforwideorbitplanets |