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Predictions of the WFIRST Microlensing Survey. I. Bound Planet Detection Rates — The Astrophysical Journal Supplement Series

Revision f677337a-b3b1-45ff-a05b-a4adce080c60 · 11/5/2026, 11:06:35 PM UTC
Key
penny2019roman
Authors
Penny, Matthew T.; Gaudi, B. Scott; Kerins, Eamonn; Rattenbury, Nicholas J.; Mao, Shude; Calchi Novati, Sebastiano
Issued
2019
Type
article-journal
Container
The Astrophysical Journal Supplement Series
Volume
241
Pages
3
Raw CSL JSON
{
  "DOI": "10.3847/1538-4365/aafb69",
  "URL": "https://arxiv.org/abs/1808.02490",
  "note": "WFIRST was renamed the Nancy Grace Roman Space Telescope in 2020.",
  "page": "3",
  "type": "article-journal",
  "title": "Predictions of the WFIRST Microlensing Survey. I. Bound Planet Detection Rates",
  "author": [
    {
      "given": "Matthew T.",
      "family": "Penny"
    },
    {
      "given": "B. Scott",
      "family": "Gaudi"
    },
    {
      "given": "Eamonn",
      "family": "Kerins"
    },
    {
      "given": "Nicholas J.",
      "family": "Rattenbury"
    },
    {
      "given": "Shude",
      "family": "Mao"
    },
    {
      "given": "Sebastiano",
      "family": "Calchi Novati"
    }
  ],
  "issued": {
    "date-parts": [
      [
        2019
      ]
    ]
  },
  "volume": "241",
  "accessed": {
    "date-parts": [
      [
        2026,
        11,
        6
      ]
    ]
  },
  "container-title": "The Astrophysical Journal Supplement Series"
}

Claims

  1. The Roman (formerly WFIRST) microlensing survey is predicted to detect about 1,400 bound exoplanets, targeting cold, low-mass planets on orbits beyond roughly 1 AU, with sensitivity down to about 0.02 Earth masses, roughly the mass of Ganymede.
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