Description
Following the discovery of the first exoplanets around PSR B1257+12 in 1992 via the pulsar timing method (Wolszczan & Frail, 1992), the detection of 51 Pegasi b in 1995 (Mayor & Queloz, 1995) switched the search for exoplanets to those around sun-like stars in a concrete manner. Via the radial velocity method, astronomers had evidenced the existence of confirmed exoplanets around sun-like stars. In 2014, the transit method became responsible for a much higher proportion of these detections than all other methods (NASA, 2025). The following upcoming space mission will combine its precisely engineered capabilities with the capacity of the transit method, to increase the number of exoplanets detected by a minimum order of magnitude of 30.
The Nancy Grace Roman Space Telescope (Roman) will survey the galactic bulge through the transit and microlensing detection methods. It will do so through a wide field of view of 0.281 square degrees. Ahead of this mission's launch window of October 2026 to May 2027, the distribution of key parameters, the separation, eccentricity, planet to star mass ratio and mutual inclination, are calculated, which will be used to simulate the Galactic Buldge Time Domain Survey transit yield.
