Roman’s long-term sky monitoring, which will enable these results, represents a boon to what scientists call time-domain astronomy, which studies how the
A simulated image of Roman’s observations toward the center of our galaxy, spanning only less than 1 percent of the total area of Roman’s galactic bulge time-domain survey. The simulated stars were drawn from the Besançon Galactic Model.NASA’s Nancy Grace Roman Space Telescope will provide one of the deepest-ever views into the heart of our Milky Way galaxy.
“Roman will be an incredible discovery machine, pairing a vast view of space with keen vision,” said Julie McEnery, the Roman senior project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Its time-domain surveys will yield a treasure trove of new information about the cosmos.”, which occur when an object such as a star or planet comes into near-perfect alignment with an unrelated background star from our viewpoint.
This artist’s concept shows the region of the Milky Way Roman’s galactic bulge time-domain survey will cover. The higher density of stars in this direction will yield more than 50,000 microlensing events, which will reveal planets, black holes, neutron stars, trans-Neptunian objects, and enable exciting stellar science. The survey will also cover relatively uncharted territory when it comes to planet-finding.
This animation compares signals from two planet detection methods: microlensing and transit for both high- and low-mass planets. Microlensing creates spikes in a star’s brightness, while transits have the opposite effect. Since both methods involve tracking the amount of light we receive from stars over time, astronomers will be able to use the same data set for both methods. Credit: NASA’s Goddard Space Flight Center/CI Labbetween Earth and the center of the galaxy.
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