ROSES 2025: D.10 Astrophysics Theory

The Astrophysics Theory Program (ATP) supports efforts to develop the basic theory for NASA's space astrophysics programs. Abstracts of previously selected ATP projects may be found online by clicking on "CLOSED/PAST" at https://nspires.nasaprs.com/external/ searching on "Astrophysics Theory" and downloading the PDF file under the heading "Selections" on the page of the year of interest. The periods of performance of investigations for this research element may range from one to four years. Most awards will have a duration of three years, but four-year awards may be made if the need for the longer duration is sufficiently well justified in the proposal.

The Astrophysics Theory Program does not permit multiple Principal Investigators (PIs). Each proposed investigation must be led by a single PI. The PI institution is expected to fund Co-Investigator(s) (Co-Is) participating via subawards, except where the Co-Is at a Government laboratory, including the Jet Propulsion Laboratory.

The proposed work submitted for this program must both:

• Be directly relevant to NASA space astrophysics goals by facilitating the interpretation of data from space astrophysics missions or by leading to predictions that can be tested with space astrophysics observations; and

• Consist predominantly of theoretical astrophysics studies or the development of theoretical astrophysics models.

ATP proposals satisfying both of the above requirements may involve development of data analysis methods for astrophysics missions and may incidentally include actual data analysis as a test of the theory or the method.