Using Euclid Galactic Bulge Survey Data to Enhance Roman’s GBTDS and GPS Surveys
| Program ID | 19052 |
|---|---|
| Science Category | Exoplanets & Exoplanet Formation |
| Program Type | Analysis |
| Category | Small |
| Principal Investigator | Matthew Penny |
| PI Institution | Louisiana State University |
| Co-Investigators |
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| Abstract | The first year of data from the Roman Galactic Bulge Time Domain Survey (GBTDS) and Galactic Plane Survey (GPS) will be deep and wide enough to far outstrip Gaia's ability to provide proper motions. The Euclid Galactic Bulge Survey, a ~5 deg^2 survey of the inner Galactic bulge covering most of the GBTDS and several deg^2 of the GPS with its VIS instrument provides a precursor data set at the same resolution as Roman. We propose to combine the images from this survey into a high-resolution drizzled stack, measure deep PSF photometry and astrometry of all stars in the area, and cross match these with the first Roman catalogs, as well as compute completeness corrections. With these data we will measure proper motions that will allow us to separate bulge stars from the disk down the main sequence, and measure completeness corrected luminosity functions of the separated bulge and disk populations. We will use the proper motions to select a pure sample of bulge stars that can be searched for transiting planets, and produce maps of of relative bulge-disk proper motion separations and bulge-disk star count ratios that are important for constraining population synthesis Galactic models. |